{"id":92391,"date":"2026-08-10T08:41:45","date_gmt":"2026-08-10T00:41:45","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/92391.html"},"modified":"2026-08-10T08:41:45","modified_gmt":"2026-08-10T00:41:45","slug":"c%e8%af%ad%e8%a8%80%e5%85%a5%e9%97%a8-%e5%88%86%e6%94%af%e5%92%8c%e5%be%aa%e7%8e%af%e7%9f%a5%e8%af%86%e8%ae%b2%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/92391.html","title":{"rendered":"C\u8bed\u8a00\u5165\u95e8--\u5206\u652f\u548c\u5faa\u73af\u77e5\u8bc6\u8bb2\u89e3"},"content":{"rendered":"

\u524d\u8a00<\/h2>\n

C\u8bed\u8a00\u662f\u4e00\u95e8\u7ed3\u6784\u578b\u8bed\u8a00，\u90a3\u4e48\u5728C\u8bed\u8a00\u4e2d\u6709\u54ea\u4e9b\u7ed3\u6784\u5462？\u5176\u5b9e\u5305\u542b\u987a\u5e8f\u7ed3\u6784\u3001\u5faa\u73af\u7ed3\u6784\u3001\u9009\u62e9\u7ed3\u6784\u3002\u5176\u4e2dif\u3001swtich\u8bed\u53e5\u5b9e\u73b0\u5206\u652f\u7ed3\u6784，while\u3001for\u3001do-while\u8bed\u53e5\u5b9e\u73b0\u5faa\u73af\u7ed3\u6784\u3002\u4eca\u5929\u6211\u4eec\u5c31\u5bf9\u5206\u652f\u548c\u5faa\u73af\u7684\u77e5\u8bc6\u8fdb\u884c\u8bb2\u89e3\u3002<\/p>\n

1.if\u8bed\u53e5<\/h2>\n

1.if<\/h3>\n

\u8bed\u6cd5\u5f62\u5f0f：（\u4e66\u5199\u683c\u5f0f）<\/p>\n

if<\/span>(<\/span>\u8868\u8fbe\u5f0f)<\/span>
\n \u8bed\u53e5<\/p>\n

\u8868\u8fbe\u5f0f\u4f5c\u4e3a\u4e00\u4e2a\u5224\u65ad\u6807\u51c6（\u5728C\u8bed\u8a00\u4e2d，0\u4e3a\u5047，\u975e0\u4e3a\u771f）
\n\u00b7 \u82e5\u8868\u8fbe\u5f0f\u5224\u65ad\u4e3a\u771f，\u5219\u6267\u884c\u4e0b\u9762\u7684\u8bed\u53e5，\u4e3a\u5047，\u5219\u8df3\u8fc7\u4e0d\u6267\u884c\u4e0b\u9762\u7684\u8bed\u53e5
\n\u00b7 \u8868\u8fbe\u5f0f\u8ba1\u7b97\u7ed3\u679c\u4e3a0，\u5219\u4e3a\u5047，\u4e0d\u6267\u884c\u8bed\u53e5，\u7ed3\u679c\u4e0d\u4e3a\u96f6，\u5219\u6267\u884c\u4e0b\u9762\u8bed\u53e5<\/p>\n

\u4f8b\u5b50：\u8f93\u5165\u4e00\u4e2a\u6574\u6570，\u5224\u65ad\u662f\u5426\u4e3a\u5947\u6570<\/p>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span>
\nint<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\n int<\/span> a =<\/span> 0<\/span>;<\/span>
\n printf<\/span>(<\/span>"\u8bf7\u8f93\u5165\u4e00\u4e2a\u6574\u6570："<\/span>)<\/span>;<\/span>
\n scanf<\/span>(<\/span>"%d"<\/span>,<\/span> &<\/span>a)<\/span>;<\/span>
\n if<\/span> (<\/span>a %<\/span> 2<\/span> ==<\/span> 1<\/span>)<\/span> \/\/ ==\u662f\u5224\u65ad==\u5de6\u53f3\u4e24\u8fb9\u7684\u503c\u662f\u5426\u76f8\u7b49，\u76f8\u7b49\u4e3a\u771f，\u4e0d\u76f8\u7b49\u4e3a\u5047； =\u662f\u8d4b\u503c\u8fd0\u7b97\u7b26<\/span>
\n printf<\/span>(<\/span>"%d\u662f\u5947\u6570"<\/span>,<\/span>a)<\/span>;<\/span>
\n return<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

2.else<\/h3>\n

\u4ece\u4e0a\u9762\u4f8b\u5b50\u6765\u8bf4，\u4e00\u4e2a\u6574\u6570\u5224\u65ad\u4e4b\u540e\u4e0d\u662f\u5947\u6570，\u90a3\u4e0d\u5c31\u4e0d\u5c31\u662f\u5076\u6570\u4e86，\u73b0\u5728\u6211\u4eec\u8981\u5bf9\u4e0a\u8ff0\u4ee3\u7801\u8fdb\u4e00\u6b65\u4f18\u5316，
\n\u8fd9\u5c31\u8981\u4f7f\u7528\u5230if-else\u8bed\u53e5\u4e86，\u4e0b\u9762\u662f\u4e66\u5199\u683c\u5f0f：<\/p>\n

if<\/span>(<\/span>\u8868\u8fbe\u5f0f)<\/span>
\n \u8bed\u53e51<\/span>
\n else<\/span>
\n \u8bed\u53e52<\/span><\/p>\n

else\u7684\u4e2d\u6587\u610f\u601d\u662f\u5426\u5219，\u4e5f\u5c31\u662f\u8bf4，\u5728if-else\u8bed\u53e5\u4e2d，\u8981\u4e48\u662fif\u8bed\u53e5\u6267\u884c，\u8981\u4e48\u662felse\u8bed\u53e5\u6267\u884c，\u4e24\u8005\u5fc5\u987b\u6709\u4e00\u65b9\u8981\u6267\u884c
\n\u90a3\u6211\u4eec\u5c06\u4e0a\u9762\u4ee3\u7801\u8fdb\u884c\u6539\u9020<\/p>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span>
\nint<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> a =<\/span> 0<\/span>;<\/span>
\nprintf<\/span>(<\/span>"\u8bf7\u8f93\u5165\u4e00\u4e2a\u6574\u6570："<\/span>)<\/span>;<\/span>
\nscanf<\/span>(<\/span>"%d"<\/span>,<\/span> &<\/span>a)<\/span>;<\/span>
\nif<\/span> (<\/span>a %<\/span> 2<\/span> ==<\/span> 1<\/span>)<\/span>
\nprintf<\/span>(<\/span>"%d\u662f\u5947\u6570"<\/span>,<\/span> a)<\/span>;<\/span>
\nelse<\/span> \/\/\u82e5\u4e0d\u662f\u5947\u6570，\u90a3\u5c31\u662f\u5076\u6570<\/span>
\nprintf<\/span>(<\/span>"%d\u662f\u5076\u6570"<\/span>,<\/span>a)<\/span>;<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u7ec3\u4e60：\u8f93\u5165\u4e00\u4e2a\u5e74\u9f84，>=18\u5c31\u8f93\u51fa：\u6210\u5e74，\u5426\u5219\u8f93\u51fa\u672a\u6210\u5e74<\/p>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span>
\nint<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> age =<\/span> 0<\/span>;<\/span>
\nprintf<\/span>(<\/span>"\u8bf7\u8f93\u5165\u4e00\u4e2a\u5e74\u9f84："<\/span>)<\/span>;<\/span>
\nscanf<\/span>(<\/span>"%d"<\/span>,<\/span> &<\/span>age)<\/span>;<\/span>
\nif<\/span> (<\/span>age>=<\/span>18<\/span>)<\/span>
\nprintf<\/span>(<\/span>"\u6210\u5e74"<\/span>)<\/span>;<\/span>
\nelse<\/span>
\nprintf<\/span>(<\/span>"\u672a\u6210\u5e74"<\/span>)<\/span>；
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

3.\u5206\u652f\u5185\u5305\u542b\u591a\u6761\u8bed\u53e5<\/h3>\n

\u7531\u4e0a\u9762\u5e74\u9f84\u5224\u65ad\u7684\u4ee3\u7801\u5f15\u5165，\u53bb\u6389\u672a\u6210\u5e74\u7684\u5224\u65ad，\u90a3\u5982\u679c\u6211\u60f3\u5728\u5224\u65ad\u6210\u5e74\u540e\u9762\u518d\u52a0\u4e0a\u4e00\u53e5\u8f93\u51fa：\u53ef\u4ee5\u8c08\u604b\u7231
\n\u4ee3\u7801\u6539\u8fdb\u5982\u4e0b：<\/p>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span>
\nint<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> age =<\/span> 0<\/span>;<\/span>
\nprintf<\/span>(<\/span>"\u8bf7\u8f93\u5165\u4e00\u4e2a\u5e74\u9f84："<\/span>)<\/span>;<\/span>
\nscanf<\/span>(<\/span>"%d"<\/span>,<\/span> &<\/span>age)<\/span>;<\/span>
\nif<\/span> (<\/span>age>=<\/span>18<\/span>)<\/span>
\nprintf<\/span>(<\/span>"\u6210\u5e74"<\/span>)<\/span>;<\/span>
\nprintf<\/span>(<\/span>"\u53ef\u4ee5\u8c08\u604b\u7231"<\/span>)<\/span>;<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u4f60\u60f3\u7684\u6539\u8fdb\u65b9\u6848\u662f\u4e0d\u662f\u8fd9\u79cd？\u6765\u770b\u4ee3\u7801\u8fd0\u884c\u7684\u7ed3\u679c
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\n\u7ed3\u679c\u662f\u4e0d\u662f\u4e0e\u6211\u4eec\u60f3\u8c61\u7684\u5b8c\u5168\u4e0d\u4e00\u6837，\u65e0\u8bba\u662f\u4e0d\u662f>=18,\u7ed3\u679c\u90fd\u8f93\u51fa\u53ef\u4ee5\u8c08\u604b\u7231，\u8fd9\u662f\u4e3a\u4ec0\u4e48\u5462？
\n\u5728C\u8bed\u8a00\u4e2d，\u9ed8\u8ba4if\u540e\u9762\u53ea\u80fd\u8ddf1\u6761\u8bed\u53e5，\u8981\u662f\u60f3\u63a7\u5236\u591a\u6761\u8bed\u53e5，\u5c31\u5f97\u6709{ }\u5c06\u591a\u6761\u8bed\u53e5\u90fd\u62ec\u8d77\u6765，else\u7c7b\u4f3c<\/p>\n

\u7ed3\u5408\u8fd9\u4e2a\u6761\u4ef6，if\u9ed8\u8ba4\u53ea\u80fd\u63a7\u5236\u8f93\u51fa\u6210\u5e74\u7684\u8fd9\u6761\u8bed\u53e5，\u53ef\u4ee5\u8c08\u604b\u7231\u8fd9\u6761\u8bed\u53e5\u5c31\u4f5c\u4e3a\u72ec\u7acb\u8bed\u53e5，\u65e0\u8bba\u662f\u5426\u6210\u5e74，\u8be5\u8bed\u53e5\u90fd\u4f1a\u8f93\u51fa，
\n\u6240\u4ee5\u6539\u8fdb\u65b9\u6848\u662f\u5c06\u8fd92\u6761\u8bed\u53e5\u7528{ }\u62ec\u8d77\u6765，\u5c31\u53ef\u4ee5\u5f97\u5230\u60f3\u8981\u8f93\u51fa\u7684\u7ed3\u679c\u5566！\u8fd9\u91cc\u6211\u5c31\u4e0d\u505a\u8fc7\u591a\u7684\u6f14\u793a\u4e86，\u6839\u636e\u63d0\u793a\u5b8c\u6210\u6539\u8fdb\u4ee3\u7801\u3002<\/p>\n

4.\u5d4c\u5957if<\/h3>\n

\u5728if-else\u8bed\u53e5\u4e2d，else\u8fd8\u53ef\u4ee5\u548c\u53e6\u4e00\u4e2aif\u8bed\u53e5\u6784\u6210 \u591a\u91cd\u5224\u65ad
\n\u4f8b\u5b50：\u8f93\u5165\u4e00\u4e2a\u6574\u6570，\u5224\u65ad\u8fd9\u4e2a\u6570\u662f\u6b63\u6570\u3001\u8d1f\u6570\u8fd8\u662f0<\/p>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span>
\nint<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> a =<\/span> 0<\/span>;<\/span>
\nprintf<\/span>(<\/span>"\u8bf7\u8f93\u5165\u4e00\u4e2a\u6574\u6570："<\/span>)<\/span>;<\/span>
\nscanf<\/span>(<\/span>"%d"<\/span>,<\/span> &<\/span>a)<\/span>;<\/span>
\nif<\/span> (<\/span>a ><\/span> 0<\/span>)<\/span>
\nprintf<\/span>(<\/span>"%d\u662f\u6b63\u6570"<\/span>,<\/span> a)<\/span>;<\/span>
\n \/\/\u5728a>0\u5224\u65ad\u540e，\u8fd8\u5269a<0\u548ca=0,\u5728else\u91cc\u7ee7\u7eed\u8fdb\u4e00\u6b65\u5224\u65ad，\u6240\u4ee5\u8bf4if-else\u8bed\u53e5\u91cc\u5d4c\u5957if<\/span>
\nelse<\/span> if<\/span> (<\/span>a <<\/span> 0<\/span>)<\/span>
\nprintf<\/span>(<\/span>"%d\u662f\u8d1f\u6570"<\/span>,<\/span> a)<\/span>;<\/span>
\nelse<\/span>
\nprintf<\/span>(<\/span>"0"<\/span>)<\/span>;<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u5176\u5b9eif\u8bed\u53e5\u4e0d\u4ec5\u53ef\u4ee5\u5d4c\u5957\u5728else\u8bed\u53e5\u91cc，\u8fd8\u53ef\u4ee5\u5d4c\u5957\u5728if\u8bed\u53e5\u91cc<\/p>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span>
\nint<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> a =<\/span> 0<\/span>;<\/span>
\nprintf<\/span>(<\/span>"\u8bf7\u8f93\u5165\u4e00\u4e2a\u6574\u6570："<\/span>)<\/span>;<\/span>
\nscanf<\/span>(<\/span>"%d"<\/span>,<\/span> &<\/span>a)<\/span>;<\/span>
\nif<\/span> (<\/span>a >=<\/span> 0<\/span>)<\/span>
\n{<\/span>
\nif<\/span> (<\/span>a ><\/span> 0<\/span>)<\/span>
\nprintf<\/span>(<\/span>"%d\u662f\u6b63\u6570"<\/span>,<\/span> a)<\/span>;<\/span>
\nelse<\/span>
\nprintf<\/span>(<\/span>"0"<\/span>)<\/span>;<\/span>
\n}<\/span>
\nelse<\/span>
\nprintf<\/span>(<\/span>"%d\u662f\u8d1f\u6570"<\/span>,<\/span>a)<\/span>;<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u6211\u4e2a\u4eba\u66f4\u63a8\u8350 \u7b2c\u4e00\u79cd \u4ee3\u7801\u5f62\u5f0f，\u66f4\u4e3a\u7b80\u6d01，\u82e5\u903b\u8f91\u66f4\u6e05\u6670，\u4f7f\u7528{ }\u5c06\u6bcf\u90e8\u5206\u4ee3\u7801\u5757\u62ec\u8d77\u6765<\/p>\n

5.\u60ac\u7a7aelse\u95ee\u9898<\/h3>\n

\u6709\u4e86\u524d\u9762\u7684\u77e5\u8bc6\u7684\u5b66\u4e60，\u6211\u4eec\u4e0b\u9762\u6765\u505a\u4e00\u4e2a\u7ec3\u4e60<\/p>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span>
\nint<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> a =<\/span> 0<\/span>;<\/span>
\nint<\/span> b =<\/span> 2<\/span>;<\/span>
\nif<\/span> (<\/span>a ==<\/span> 1<\/span>)<\/span>
\nif<\/span> (<\/span>b ==<\/span> 2<\/span>)<\/span>
\nprintf<\/span>(<\/span>"hehe\\\\n"<\/span>)<\/span>;<\/span>
\nelse<\/span>
\nprintf<\/span>(<\/span>"haha\\\\n"<\/span>)<\/span>;<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u4ee3\u7801\u7684\u8fd0\u884c\u7ed3\u679c\u662f\u4ec0\u4e48？
\n\u662f\u4e0d\u662f\u5c31\u8ba4\u4e3a\u4e0a\u6765\u5c31\u5224\u65ada=0,0\u4e0d\u7b49\u4e8e1，\u6267\u884celse\u8bed\u53e5，\u8f93\u51fa：haha<\/p>\n

\u4f46\u662f\u8fd0\u884c\u4ee3\u7801\u540e，\u53d1\u73b0\u5565\u4e5f\u6ca1\u6709\u8f93\u51fa，\u4f60\u53ef\u80fd\u4f1a\u8bf4\u7b2c1\u4e2aif\u548c\u540e\u9762\u7684else\u90fd\u5bf9\u9f50\u4e86，\u4e3a\u4ec0\u4e48\u5b83\u4eec\u6784\u6210\u7684if-else\u8bed\u53e5\u6ca1\u6709\u53d1\u6325\u4f5c\u7528？<\/p>\n

\u4e00\u6761\u91cd\u8981\u89c4\u5219 ：else \u603b\u8ddf\u6700\u63a5\u8fd1\u7684if\u8fdb\u884c\u5339\u914d （\u591a\u6761if\u548celse\u7684\u60c5\u51b5\u4f7f\u7528）<\/p>\n

\u901a\u8fc7\u4ee5\u4e0a\u91cd\u8981\u89c4\u5219，\u4f60\u5c31\u660e\u767d\u4e86，\u5176\u5b9eelse\u662f\u4e0e\u7b2c2\u4e2aif\u8fdb\u884c\u5339\u914d\u7684，\u4e0d\u80fd\u5c40\u9650\u4e8e\u4ee3\u7801\u7684\u683c\u5f0f，\u5b83\u53ef\u80fd\u4f1a\u5f71\u54cd\u4f60\u7684\u5224\u65ad
\n\u6240\u4ee5，\u5728\u7b2c1\u4e2aif\u5224\u65ad\u4e3a\u5047\u65f6，\u4e0d\u6267\u884cif\u91cc\u9762\u7684\u8bed\u53e5，\u540c\u65f6\u6ca1\u6709\u4e0e\u7b2c1\u4e2a\u8bed\u53e5\u5339\u914d\u7684else，\u5373\u7a0b\u5e8f\u8fd0\u884c\u7ed3\u675f\u3002<\/p>\n

2.\u5173\u7cfb\u64cd\u4f5c\u7b26<\/h2>\n

\u5728C\u8bed\u8a00\u4e2d，\u6bd4\u8f83\u5173\u7cfb\u7684\u8868\u8fbe\u5f0f\u4e2d\u7528\u7684\u8fd0\u7b97\u7b26\u5c31\u53eb\u201c\u5173\u7cfb\u64cd\u4f5c\u7b26\u201d,\u7528\u4e8e\u5224\u65ad\u5927\u5c0f\u5173\u7cfb，\u5e38\u7528\u4e8eif\u6216while\u7ed3\u6784
\n\u4e3b\u8981\u6709\u4ee5\u4e0b6\u4e2a：<\/p>\n

><\/span> \u5927\u4e8e \u3001 <<\/span> \u5c0f\u4e8e
\n >=<\/span> \u5927\u4e8e\u7b49\u4e8e\u3001<=<\/span>\u5c0f\u4e8e\u7b49\u4e8e
\n ==<\/span> \u76f8\u7b49\u3001!=<\/span> \u4e0d\u60f3\u7b49<\/p>\n

\u901a\u8fc7\u5173\u7cfb\u8868\u8fbe\u5f0f\u5224\u65ad 0 \u4e3a\u5047，\u975e0\u6570\u4e3a\u771f（\u901a\u5e38\u53d61）<\/p>\n

\u4e00\u4e9b\u53ef\u80fd\u5e38\u72af\u7684\u9519\u8bef<\/p>\n

1.==\u8bef\u5199=，\u5bfc\u81f4\u8ba1\u7b97\u51fa\u7684\u7ed3\u679c\u51fa\u9519<\/p>\n

if<\/span>(<\/span>x=<\/span>3<\/span>)<\/span>
\n printf<\/span>(<\/span>"yes"<\/span>)<\/span>;<\/span><\/p>\n

\u7b2c1\u4e2a\u4ee3\u7801\u62ec\u53f7\u91cc\u662f\u8d4b\u503c\u8fd0\u7b97，\u5c063\u8d4b\u7ed9x，\u5bfc\u81f4\u5f97\u5230\u7684\u7ed3\u679c\u4e3a3（\u975e0\u6570），\u7ed3\u679c\u6c38\u8fdc\u4e3a\u771f，\u5373yes\u65e0\u8bba\u5728\u4ec0\u4e48\u60c5\u51b5\u4e0b，\u90fd\u4f1a\u8f93\u51fa<\/p>\n

if<\/span>(<\/span>x==<\/span>3<\/span>)<\/span>
\n printf<\/span>(<\/span>"yes"<\/span>)<\/span>;<\/span><\/p>\n

\u7b2c2\u4e2a\u4ee3\u7801\u62ec\u53f7\u91cc\u662f\u5173\u7cfb\u8fd0\u7b97，\u5224\u65adx\u7684\u503c\u662f\u5426\u4e0e3\u76f8\u7b49，\u82e5\u76f8\u7b49，\u8fd4\u56de1，\u8f93\u51fayes；\u82e5\u4e0d\u76f8\u7b49，\u8fd4\u56de0，\u4e0d\u6267\u884c\u8bed\u53e5<\/p>\n

\u5173\u4e8e\u8fd9\u4e2a\u9519\u8bef，\u6709\u4e00\u4e2a\u5efa\u8bae，\u5c06\u53d8\u91cf\u5199\u5728\u8868\u8fbe\u5f0f\u7684\u53f3\u8fb9，\u4e3a\u4ec0\u4e48\u5462？<\/p>\n

\/\/ if(3=x)<\/span>
\n\/\/ if(3==x)<\/span><\/p>\n

\u5bf9\u4e8e\u5173\u7cfb\u8fd0\u7b97\u4e0d\u4f1a\u6709\u4ec0\u4e48\u5f71\u54cd，\u4e07\u4e00\u5c11\u5199\u4e86\u4e00\u4e2a=，\u53d8\u6210\u8d4b\u503c\u8868\u8fbe\u5f0f，\u7a0b\u5e8f\u4f1a\u51fa\u73b0\u62a5\u9519，\u53d8\u91cfx\u4e0d\u80fd\u8d4b\u503c\u7ed93，\u63d0\u9192\u4f60\u5c11\u4e86\u4e00\u4e2a=<\/p>\n

2.\u591a\u4e2a\u5173\u7cfb\u8fd0\u7b97\u7b26\u4e0d\u9002\u5408\u8fde\u7528
\n\u4e3e\u4f8b：\u5224\u65ad\u5e74\u9f84\u572818~36\u5c81，\u8f93\u51fa\u201c\u9752\u5e74\u201d<\/p>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span>
\nint<\/span> main
\n{<\/span>
\n if<\/span>(<\/span>18<\/span><=<\/span>age<=<\/span>36<\/span>)<\/span>
\n printf<\/span>(<\/span>"\u9752\u5e74"<\/span>)<\/span>;<\/span>
\n return<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u4f60\u662f\u4e0d\u662f\u60f3\u5230\u5199\u4e00\u4e2a\u8ddf\u4e0a\u9762\u5dee\u4e0d\u591a\u7684\u4ee3\u7801，\u4f46\u662f\u4f60\u8fd0\u884c\u540e\u4f60\u4f1a\u53d1\u73b0，\u5b83\u53ea\u8981\u8f93\u5165\u5927\u4e8e18\u7684\u4efb\u4f55\u6570，\u90fd\u80fd\u8f93\u51fa\u9752\u5e74，\u8fd9\u662f\u4e3a\u4ec0\u4e48\u5462？<\/p>\n

\u4e00\u6761\u8fd0\u7b97\u89c4\u5219： \u5173\u7cfb\u8fd0\u7b97\u7b26\u6309\u7167\u4ece\u5de6\u5230\u53f3\u7684\u987a\u5e8f\u8fd0\u7b97
\n\u62ec\u53f7\u91cc18<=age<=36,\u5148\u8f93\u5165\u4e00\u4e2a\u5927\u4e8e18\u7684\u6570，\u5148\u8fdb\u884c18<=age\u7684\u5224\u65ad，\u7ed3\u679c\u4e3a\u771f，\u8fd4\u56de1，1<=36，\u4f7f\u5f97\u8fd9\u4e2a\u5173\u7cfb\u8868\u8fbe\u5f0f\u5728\u8f93\u5165\u6bd418\u5927\u7684\u6570\u65f6，\u6c38\u8fdc\u4e3a\u771f，\u8f93\u51fa\u201c\u9752\u5e74\u201d，\u8fd9\u662f\u8ddf\u4f60\u60f3\u8981\u7684\u7ed3\u679c\u5b8c\u5168\u4e0d\u4e00\u6837\u4e86\u3002\u600e\u4e48\u6539\u8fdb\u5462？
\n\u6539\u8fdb\u4e4b\u540e\u7684\u4ee3\u7801<\/p>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span>
\nint<\/span> main
\n{<\/span>
\n if<\/span>(<\/span>18<\/span><=<\/span>age &&<\/span> age<=<\/span>36<\/span>)<\/span> \/\/ &&\u8868\u793a\u548c\u7684\u610f\u601d，\u5c06\u4e24\u4e2a\u5173\u7cfb\u5224\u65ad\u5206\u5f00，\u5c31\u53ef\u4ee5\u5f97\u5230\u60f3\u8981\u7684\u7ed3\u679c\u4e86，\u4e0b\u9762\u4f1a\u5c06\u5230\u903b\u8f91\u8fd0\u7b97\u7b26<\/span>
\n printf<\/span>(<\/span>"\u9752\u5e74"<\/span>)<\/span>;<\/span>
\n return<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

3.\u6761\u4ef6\u64cd\u4f5c\u7b26<\/h2>\n

\u6761\u4ef6\u64cd\u4f5c\u7b26\u4e5f\u53eb\u201c\u4e09\u76ee\u64cd\u4f5c\u7b26\u201d，\u662f\u9700\u8981\u4e09\u4e2a\u64cd\u4f5c\u6570\u53c2\u4e0e\u8fd0\u7b97
\n\u4e66\u5199\u683c\u5f0f\u5982\u4e0b：<\/p>\n

exp1?<\/span>exp2:<\/span>exp3<\/p>\n

\u5b83\u7684\u8ba1\u7b97\u89c4\u5219\u662f\u5148\u5bf9\u8868\u8fbe\u5f0f1\u8fdb\u884c\u8ba1\u7b97，\u5224\u65ad\u5176\u771f\u5047，\u82e5\u4e3a\u771f，\u5219\u6267\u884c\u8868\u8fbe\u5f0f2，\u4e0d\u6267\u884c\u8868\u8fbe\u5f0f3，\u8868\u8fbe\u5f0f2\u8ba1\u7b97\u51fa\u7684\u7ed3\u679c\u4e3a\u6574\u4e2a\u8868\u8fbe\u5f0f\u7684\u7ed3\u679c；\u82e5\u4e3a\u5047，\u5219\u6267\u884c\u8868\u8fbe\u5f0f3，\u4e0d\u6267\u884c\u8868\u8fbe\u5f0f2，\u8868\u8fbe\u5f0f3\u8ba1\u7b97\u51fa\u7684\u7ed3\u679c\u4e3a\u6574\u4e2a\u8868\u8fbe\u5f0f\u7684\u7ed3\u679c\u3002<\/p>\n

\u4e3a\u4e86\u5e2e\u52a9\u7406\u89e3，\u5c06\u6761\u4ef6\u64cd\u4f5c\u7b26\u6240\u8868\u8fbe\u7684\u610f\u601d\u8f6c\u5316\u4e3aif\u7684\u5f62\u5f0f<\/p>\n

if<\/span>(<\/span>exp1)<\/span>
\n {<\/span>exp2;<\/span>}<\/span>
\nelse<\/span>
\n {<\/span>exp3;<\/span>}<\/span><\/p>\n

\u770b\u5b8c\u4e4b\u540e，\u6761\u4ef6\u64cd\u4f5c\u7b26\u5176\u5b9e\u5c31\u662f\u5bf9if\u4ee3\u7801\u7684\u4e00\u79cd\u7b80\u5316\u5199\u6cd5<\/p>\n

4.\u903b\u8f91\u64cd\u4f5c\u7b26：&&，||，！<\/h2>\n

&&\u3001||\u90fd\u4e3a\u53cc\u76ee\u64cd\u4f5c\u7b26，！\u4e3a\u5355\u76ee\u64cd\u4f5c\u7b26
\n&&：\u8868\u793a\u5e76\u4e14\u3001\u548c\u7684\u610f\u601d\u3002\u8fd0\u7b97\u89c4\u5219：\u5f53&&\u4e24\u4fa7\u7684\u8868\u8fbe\u5f0f\u90fd\u4e3a\u771f\u65f6，\u6574\u4e2a\u8868\u8fbe\u5f0f\u624d\u4e3a\u771f，\u5426\u5219\u4e3a\u5047
\n||：\u8868\u793a\u6216\u8005\u7684\u610f\u601d\u3002\u8fd0\u7b97\u89c4\u5219：\u5f53||\u4e24\u4fa7\u7684\u8868\u8fbe\u5f0f\u81f3\u5c11\u6709\u4e00\u4e2a\u662f\u771f\u65f6，\u6574\u4e2a\u8868\u8fbe\u5f0f\u624d\u4e3a\u771f，\u5426\u5219\u4e3a\u5047
\n！：\u8868\u793a\u53d6\u53cd\u7684\u610f\u601d\u3002\u8fd0\u7b97\u89c4\u5219：\u5f53\u8868\u8fbe\u5f0f\u4e3a\u771f\u65f6，\u53d6\u53cd\u540e\u7ed3\u679c\u4e3a\u5047；\u8868\u8fbe\u5f0f\u4e3a\u5047\u65f6，\u53d6\u53cd\u540e\u7ed3\u679c\u4e3a\u771f<\/p>\n

1.\u903b\u8f91\u53d6\u53cd\u8fd0\u7b97\u7b26 !<\/h3>\n

\u6839\u636e\u4e0a\u9762\u5bf9 **！**\u7684\u63cf\u8ff0，\u53ef\u4ee5\u753b\u51fa\u56fe\u7684\u5f62\u5f0f\u8fdb\u4e00\u6b65\u7406\u89e3
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\n\u4e3e\u4e00\u4e2a\u4ee3\u7801\u4f8b\u5b50，\u5e2e\u52a9\u7406\u89e3<\/p>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span>
\nint<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> flag =<\/span> 0<\/span>;<\/span>
\nif<\/span> (<\/span>!<\/span>flag)<\/span>
\nprintf<\/span>(<\/span>"do something"<\/span>)<\/span>;<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u4e0a\u9762\u4ee3\u7801 if\u62ec\u53f7\u91cc\u9762\u7684\u8868\u8fbe\u5f0f\u8981\u4e3a\u771f\u65f6，\u624d\u4f1a\u6267\u884c\u4e0b\u9762\u8bed\u53e5，!flag\u4e3a\u771f，\u90a3\u4e48flag\u5c31\u8981\u4e3a\u5047，\u4e0b\u9762\u8bed\u53e5\u624d\u4f1a\u88ab\u6267\u884c<\/p>\n

2.\u903b\u8f91\u4e0e\u8fd0\u7b97\u7b26 &&<\/h3>\n

\u6839\u636e\u4e0a\u9762\u5bf9 **&&**\u7684\u63cf\u8ff0，\u53ef\u4ee5\u753b\u51fa\u56fe\u7684\u5f62\u5f0f\u8fdb\u4e00\u6b65\u7406\u89e3
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\n\u4e3e\u4e00\u4e2a\u4ee3\u7801\u4f8b\u5b50，\u5e2e\u52a9\u7406\u89e3<\/p>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span>
\nint<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> month =<\/span> 0<\/span>;<\/span>
\nscanf<\/span>(<\/span>"%d"<\/span>,<\/span> &<\/span>month)<\/span>;<\/span>
\nif<\/span> (<\/span>month >=<\/span> 3<\/span> &&<\/span> month <=<\/span> 5<\/span>)<\/span>
\nprintf<\/span>(<\/span>"\u6625\u5929"<\/span>)<\/span>;<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u4e0a\u9762\u4ee3\u7801\u4e2d，3~5\u6708\u662f\u6625\u5929，\u8981\u6ee1\u8db3\u8f93\u5165\u7684\u6708\u4efd\u65e2\u8981>=3,\u53c8\u8981<=5,\u4e24\u4e2a\u6761\u4ef6\u7f3a\u4e00\u4e0d\u53ef，\u5fc5\u987b\u540c\u65f6\u6ee1\u8db3\u624d\u80fd\u8f93\u51fa\u6625\u5929<\/p>\n

3.\u903b\u8f91\u6216\u8fd0\u7b97\u7b26 ||<\/h3>\n

\u6839\u636e\u4e0a\u9762\u5bf9 **||**\u7684\u63cf\u8ff0，\u53ef\u4ee5\u753b\u51fa\u56fe\u7684\u5f62\u5f0f\u8fdb\u4e00\u6b65\u7406\u89e3
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\n\u4e3e\u4e00\u4e2a\u4ee3\u7801\u4f8b\u5b50，\u5e2e\u52a9\u7406\u89e3<\/p>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span>
\nint<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> month =<\/span> 0<\/span>;<\/span>
\nscanf<\/span>(<\/span>"%d"<\/span>,<\/span> &<\/span>month)<\/span>;<\/span>
\nif<\/span> (<\/span>month ==<\/span> 12<\/span> ||<\/span> month ==<\/span> 1<\/span> ||<\/span> month ==<\/span> 2<\/span>)<\/span>
\nprintf<\/span>(<\/span>"\u51ac\u5929"<\/span>)<\/span>;<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u4e0a\u9762\u4ee3\u7801，12\u6708\u62161\u6708\u62162\u6708\u662f\u51ac\u5929，\u8f93\u5165\u7684\u6708\u4efd\u6ee1\u8db3\u8fd93\u4e2a\u5176\u4e2d1\u4e2a,\u5c31\u53ef\u4ee5\u8f93\u51fa\u51ac\u5929<\/p>\n

4.\u7ec3\u4e60：\u95f0\u5e74\u7684\u5224\u65ad<\/h3>\n

\u8f93\u5165\u4e00\u4e2a\u5e74\u4efdyear，\u5224\u65adyear\u662f\u5426\u662f\u95f0\u5e74
\n\u95f0\u5e74\u5224\u65ad\u7684\u89c4\u5219：
\n1.\u80fd\u88ab4\u6574\u9664\u5e76\u4e14\u4e0d\u80fd\u88ab100\u6574\u9664\u662f\u95f0\u5e74
\n2. \u80fd\u88ab400\u6574\u9664\u662f\u95f0\u5e74<\/p>\n

\/\/\u80fd\u88ab4\u6574\u9664\u3001\u4e0d\u80fd\u88ab100\u6574\u9664\u662f\u95f0\u5e74\u662f\u5e76\u5217\u5173\u7cfb<\/span>
\n\/\/ year % 4 == 0 && year % 100 != 0<\/span>
\n\/\/\u80fd\u88ab400\u6574\u9664\u662f\u95f0\u5e74<\/span>
\n\/\/ year % 400 == 0<\/span>
\n\/\/ 1\u548c2\u4e24\u4e2a\u5224\u65ad\u6761\u4ef6\u53ea\u8981\u6ee1\u8db3\u4efb\u4f55\u4e00\u4e2a，\u5c31\u53ef\u4ee5\u5224\u65ad\u662f\u95f0\u5e74，\u8fd9\u91cc\u662f\u7528\u201c\u6216\u201d\u7684\u5173\u7cfb\u8fdb\u884c\u6761\u4ef6\u8fde\u63a5<\/span>
\n#<\/span>include<\/span> <stdio.h><\/span><\/span>
\nint<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> year =<\/span> 0<\/span>;<\/span>
\nscanf<\/span>(<\/span>"%d"<\/span>,<\/span> &<\/span>year)<\/span>;<\/span>
\nif<\/span> (<\/span>(<\/span>year %<\/span> 4<\/span> ==<\/span> 0<\/span> &&<\/span> year %<\/span> 100<\/span> !=<\/span> 0<\/span>)<\/span> ||<\/span> year %<\/span> 400<\/span> ==<\/span> 0<\/span>)<\/span>
\nprintf<\/span>(<\/span>"\u95f0\u5e74"<\/span>)<\/span>;<\/span>
\nelse<\/span>
\nprintf<\/span>(<\/span>"\u5e73\u5e74"<\/span>)<\/span>;<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

5.\u77ed\u8def<\/h3>\n

\u4ec5\u4ec5\u6839\u636e\u5de6\u64cd\u4f5c\u6570\u7684\u7ed3\u679c\u5c31\u80fd\u77e5\u9053\u6574\u4e2a\u8868\u8fbe\u5f0f\u7684\u7ed3\u679c，\u4e0d\u518d\u5bf9\u53f3\u64cd\u4f5c\u6570\u8fdb\u2f8f\u8ba1\u7b97\u7684\u8fd0\u7b97\u79f0\u4e3a\u77ed\u8def\u6c42\u503c\u3002<\/p>\n

&&\u77ed\u8def<\/h4>\n

\u6839\u636e\u4e0a\u9762**&&\u7684\u8fd0\u7b97\u89c4\u5219**：\u5f53&&\u4e24\u4fa7\u7684\u8868\u8fbe\u5f0f\u90fd\u4e3a\u771f\u65f6，\u6574\u4e2a\u8868\u8fbe\u5f0f\u624d\u4e3a\u771f，\u5426\u5219\u4e3a\u5047
\n\u5f53&&\u5de6\u4fa7\u7684\u8868\u8fbe\u5f0f\u7ed3\u679c\u4e3a0，\u53f3\u4fa7\u8868\u8fbe\u5f0f\u4e0d\u6267\u884c（\u65e0\u8bba\u53f3\u4fa7\u7684\u8868\u8fbe\u5f0f\u662f\u771f\u662f\u5047），\u6574\u4e2a\u8868\u8fbe\u5f0f\u7684\u7ed3\u679c\u90fd\u4e3a\u5047，\u5982\u4e0b\u56fe\u6240\u793a
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

||\u77ed\u8def<\/h4>\n

\u6839\u636e\u4e0a\u9762**||\u7684\u8fd0\u7b97\u89c4\u5219**：\u5f53||\u4e24\u4fa7\u7684\u8868\u8fbe\u5f0f\u81f3\u5c11\u6709\u4e00\u4e2a\u662f\u771f\u65f6，\u6574\u4e2a\u8868\u8fbe\u5f0f\u624d\u4e3a\u771f，\u5426\u5219\u4e3a\u5047
\n\u5f53||\u5de6\u4fa7\u7684\u8868\u8fbe\u5f0f\u7ed3\u679c\u4e3a1，\u53f3\u4fa7\u8868\u8fbe\u5f0f\u4e0d\u6267\u884c（\u65e0\u8bba\u53f3\u4fa7\u7684\u8868\u8fbe\u5f0f\u662f\u771f\u662f\u5047），\u6574\u4e2a\u8868\u8fbe\u5f0f\u7684\u7ed3\u679c\u90fd\u4e3a\u771f，\u5982\u4e0b\u56fe\u6240\u793a
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

5.switch\u8bed\u53e5<\/h2>\n

switch\u8bed\u53e5\u662f\u4e00\u79cd\u7279\u6b8a\u7684if-else\u7ed3\u6784，\u7528\u4e8e\u5224\u65ad\u591a\u4e2a\u7ed3\u679c\u7684\u60c5\u51b5\u3002
\n\u4e66\u5199\u683c\u5f0f：<\/p>\n

switch<\/span> (<\/span>expression)<\/span> {<\/span>
\ncase<\/span> value1:<\/span> statement
\ncase<\/span> value2:<\/span> statement
\n\u00b7\u00b7\u00b7
\ndefault<\/span>:<\/span> statement
\n}<\/span><\/p>\n

\/\/expression:\u8868\u8fbe\u5f0f, value:\u503c\u3001\u7ed3\u679c statement:\u8bed\u53e5 <\/span><\/p>\n

\u4e0a\u8ff0\u4ee3\u7801\u4e2d，\u6839\u636e\u8868\u8fbe\u5f0f\u7684\u7ed3\u679c，\u5bfb\u627e\u5bf9\u5e94\u7ed3\u679c\u7684case\u5206\u652f；\u82e5\u6ca1\u6709\u627e\u5230，\u5219\u6267\u884cdefault\u4e0b\u7684\u8bed\u53e5<\/p>\n

2\u4e2a\u6ce8\u610f
\n\u00b7 switch\u540e\u7684expression\u5fc5\u987b\u4e3a\u6574\u578b\u8868\u8fbe\u5f0f
\n\u00b7 value\u5fc5\u987b\u4e3a\u6574\u578b\u5e38\u91cf\u8868\u8fbe\u5f0f（\u5982\u6574\u6570\u3001\u5b57\u7b26） \u6ce8：\u5b57\u7b26\u7c7b\u578b\u5c5e\u4e8e\u6574\u578b<\/p>\n

1.if\u548cswitch\u8bed\u53e5\u5bf9\u6bd4<\/h3>\n

\u521a\u624d\u8bf4switch\u8bed\u53e5\u662f\u4e00\u79cd\u7279\u6b8a\u7684if-else\u7ed3\u6784，\u7528\u4e8e\u5224\u65ad\u591a\u4e2a\u7ed3\u679c\u7684\u60c5\u51b5\u3002
\n\u90a3\u4e48\u6211\u4eec\u73b0\u5728\u6765\u7528\u4e00\u4e2a\u4f8b\u5b50，\u53bb\u611f\u53d7\u5b83\u4eec\u4e4b\u95f4\u7684\u76f8\u4f3c\u70b9\u548c\u4e0d\u540c\u70b9
\n\u4f8b1：\u8f93\u5165\u4efb\u610f\u4e00\u4e2a\u6574\u6570\u503c，\u8ba1\u7b97\u96643\u540e\u7684\u4f59\u6570
\n\u4f7f\u7528if\u8bed\u53e5<\/p>\n

int<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\n\/\/ \u5b58\u653e\u6574\u6570<\/span>
\nint<\/span> a =<\/span> 0<\/span>;<\/span>
\n\/\/ \u63d0\u793a<\/span>
\nprintf<\/span>(<\/span>"\u8bf7\u8f93\u5165\u4e00\u4e2a\u6574\u6570："<\/span>)<\/span>;<\/span>
\n\/\/ \u8f93\u5165<\/span>
\nscanf<\/span>(<\/span>"%d"<\/span>,<\/span> &<\/span>a)<\/span>;<\/span>
\n\/\/\u88ab3\u9664\u540e\u7684\u4f59\u6570\u67090，1，2<\/span>
\nif<\/span> (<\/span>a %<\/span> 3<\/span> ==<\/span> 0<\/span>)<\/span>
\nprintf<\/span>(<\/span>"\u4f59\u6570\u662f0"<\/span>)<\/span>;<\/span>
\nelse<\/span> if<\/span> (<\/span>a %<\/span> 3<\/span> ==<\/span> 1<\/span>)<\/span>
\nprintf<\/span>(<\/span>"\u4f59\u6570\u662f1"<\/span>)<\/span>;<\/span>
\nelse<\/span>
\nprintf<\/span>(<\/span>"\u4f59\u6570\u662f2"<\/span>)<\/span>;<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u4f7f\u7528switch\u8bed\u53e5
\n\u4f60\u53ef\u80fd\u662f\u8fd9\u6837\u5199\u7684<\/p>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span><\/p>\n

int<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> a =<\/span> 0<\/span>;<\/span>
\nprintf<\/span>(<\/span>"\u8bf7\u8f93\u5165\u4e00\u4e2a\u6574\u6570："<\/span>)<\/span>;<\/span>
\nscanf<\/span>(<\/span>"%d"<\/span>,<\/span> &<\/span>a)<\/span>;<\/span>
\nswitch<\/span> (<\/span>a %<\/span> 3<\/span>)<\/span>
\n{<\/span>
\ncase<\/span> 0<\/span>:<\/span>
\nprintf<\/span>(<\/span>"\u4f59\u6570\u662f0\\\\n"<\/span>)<\/span>;<\/span>
\ncase<\/span> 1<\/span>:<\/span>
\nprintf<\/span>(<\/span>"\u4f59\u6570\u662f1\\\\n"<\/span>)<\/span>;<\/span>
\ncase<\/span> 2<\/span>:<\/span>
\nprintf<\/span>(<\/span>"\u4f59\u6570\u662f2\\\\n"<\/span>)<\/span>;<\/span>
\ndefault<\/span>:<\/span>
\nprintf<\/span>(<\/span>"\u8f93\u5165\u9519\u8bef\\\\n"<\/span>)<\/span>;<\/span>
\n}<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u4f46\u662f\u8fd0\u884c\u7684\u7ed3\u679c\u662f\u8fd9\u6837\u7684：
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\n\u4e3a\u4ec0\u4e48\u4f1a\u8f93\u51fa2\u53e5\u8bdd\u5462？
\n\u5728switch\u8bed\u53e5\u4e2d，\u5f53\u6267\u884c\u4e00\u4e2acase\u5206\u652f\u65f6，\u82e5\u6267\u884c\u5b8c\u6ca1\u6709\u8ba9\u5b83\u7ed3\u675f\u7684\u8bed\u53e5，\u5219\u5b83\u4f1a\u7ee7\u7eed\u5f80\u4e0b\u6267\u884c\u8bed\u53e5，\u76f4\u81f3\u6267\u884c\u5230switch\u8bed\u53e5\u672b\u5c3e\u3002\u4f46\u662f\u6211\u4eec\u60f3\u8981\u5b83\u6267\u884c\u5b8c\u4e00\u4e2a\u5206\u652f\u65f6，\u5c31\u7ed3\u675f\u5728switch\u8bed\u53e5\u7684\u8fd0\u884c，\u8fd9\u65f6\u5019\u5c31\u8981\u7528\u5230break\u8bed\u53e5\u4e86<\/p>\n

break\u8bed\u53e5 ：\u53ea\u8981\u6267\u884cbreak，\u5c31\u4f1a\u8df3\u51fa\u5faa\u73af，\u7ee7\u7eed\u5f80\u4e0b\u6267\u884c（\u7a0d\u540e\u5728\u672c\u6587\u540e\u9762\u90e8\u5206\u4f1a\u8fdb\u884c\u66f4\u8be6\u7ec6\u7684\u8bb2\u89e3，\u8fd9\u91cc\u5148\u4e86\u89e3）<\/p>\n

\u4e86\u89e3break\u7684\u4f5c\u7528\u540e，\u6211\u4eec\u5c06\u4ee3\u7801\u8fdb\u4e00\u6b65\u6539\u8fdb：<\/p>\n

\/\/\u5728\u6bcf\u4e00\u4e2acase\u540e\u90fd\u52a0\u4e0a\u4e00\u4e2abreak\u8bed\u53e5，\u7ed3\u675f\u8bed\u53e5<\/span>
\n#<\/span>include<\/span> <stdio.h><\/span><\/span><\/p>\n

int<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> a =<\/span> 0<\/span>;<\/span>
\nprintf<\/span>(<\/span>"\u8bf7\u8f93\u5165\u4e00\u4e2a\u6574\u6570："<\/span>)<\/span>;<\/span>
\nscanf<\/span>(<\/span>"%d"<\/span>,<\/span> &<\/span>a)<\/span>;<\/span>
\nswitch<\/span> (<\/span>a %<\/span> 3<\/span>)<\/span>
\n{<\/span>
\ncase<\/span> 0<\/span>:<\/span>
\nprintf<\/span>(<\/span>"\u4f59\u6570\u662f0\\\\n"<\/span>)<\/span>;<\/span>
\nbreak<\/span>;<\/span>
\ncase<\/span> 1<\/span>:<\/span>
\nprintf<\/span>(<\/span>"\u4f59\u6570\u662f1\\\\n"<\/span>)<\/span>;<\/span>
\nbreak<\/span>;<\/span>
\ncase<\/span> 2<\/span>:<\/span>
\nprintf<\/span>(<\/span>"\u4f59\u6570\u662f2\\\\n"<\/span>)<\/span>;<\/span>
\nbreak<\/span>;<\/span>
\ndefault<\/span>:<\/span>
\nprintf<\/span>(<\/span>"\u8f93\u5165\u9519\u8bef\\\\n"<\/span>)<\/span>;<\/span>
\nbreak<\/span>;<\/span>
\n}<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u4e0a\u8ff0\u4ee3\u7801\u4e2d\u7684\u6ce8\u610f\u70b9
\n\u00b7 case \u548c\u540e\u8fb9\u7684\u6570\u5b57\u4e4b\u95f4\u5fc5\u987b\u6709\u7a7a\u683c
\n\u00b7 \u6bcf\u4e00\u4e2acase \u8bed\u53e5\u4e2d\u7684\u4ee3\u7801\u6267\u884c\u5b8c\u6210\u540e，\u9700\u8981\u52a0\u4e0abreak ，\u624d\u80fd\u8df3\u51fa\u8fd9\u4e2aswitch\u8bed\u53e5<\/p>\n

2.switch\u8bed\u53e5\u7684break<\/h3>\n

\u5728switch\u8bed\u53e5\u4e2d，break\u53ef\u4ee5\u5e2e\u52a9\u5b9e\u73b0\u5206\u652f\u6548\u679c，\u4f46\u4e0d\u662f\u5728\u6bcf\u4e00\u4e2a\u5206\u652f\u90fd\u8981\u4f7f\u7528\u5230break，\u4f7f\u7528\u8981\u7ed3\u5408\u5b9e\u9645\u60c5\u51b5\u3002
\n\u5982\u4e0b\u9762\u7684\u4e00\u4e2a\u4f8b\u5b50：
\n1.\u8f93\u51651-7，\u6570\u5b57\u5206\u522b\u5bf9\u5e94\u4e86\u661f\u671f\u4e00\u5230\u661f\u671f\u65e5
\n2.\u5f53\u8f93\u51651-5\u65f6，\u8f93\u51fa\u201c\u5de5\u4f5c\u65e5\u201d； 6-7，\u5219\u8f93\u51fa\u201c\u4f11\u606f\u65e5\u201d<\/p>\n

int<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> day =<\/span> 0<\/span>;<\/span>
\nscanf<\/span>(<\/span>"%d"<\/span>,<\/span> &<\/span>day)<\/span>;<\/span>
\nswitch<\/span> (<\/span>day)<\/span>
\n{<\/span>
\ncase<\/span> 1<\/span>:<\/span>
\ncase<\/span> 2<\/span>:<\/span>
\ncase<\/span> 3<\/span>:<\/span>
\ncase<\/span> 4<\/span>:<\/span>
\ncase<\/span> 5<\/span>:<\/span>
\nprintf<\/span>(<\/span>"\u5de5\u4f5c\u65e5\\\\n"<\/span>)<\/span>;<\/span>
\nbreak<\/span>;<\/span>
\ncase<\/span> 6<\/span>:<\/span>
\ncase<\/span> 7<\/span>:<\/span>
\nprintf<\/span>(<\/span>"\u4f11\u606f\u65e5\\\\n"<\/span>)<\/span>;<\/span>
\nbreak<\/span>;<\/span>
\ndefault<\/span>:<\/span>
\nprintf<\/span>(<\/span>"\u8f93\u5165\u9519\u8bef\\\\n"<\/span>)<\/span>;<\/span>
\n}<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u56e0\u4e3a\u661f\u671f\u4e00\u5230\u4e94\u90fd\u5c5e\u4e8e\u5de5\u4f5c\u65e5，\u5728case5\u540e\u53bb\u5199\u8f93\u51fa\u5de5\u4f5c\u65e5\u7684\u8bed\u53e5，\u65e0\u8bba\u6267\u884c\u8fdb\u5165case1-5\u54ea\u4e00\u4e2a，\u7a0b\u5e8f\u90fd\u5f80\u4e0b\u5230case5\u8bed\u53e5\u5904，\u5728\u8f93\u51fa\u5de5\u4f5c\u65e5\u548c\u4f11\u606f\u65e52\u5904\u672b\u5c3e，\u52a0\u4e0abreak\u8bed\u53e5\u8fdb\u884c\u5212\u5206\u3002\u4e3a\u4ec0\u4e48\u5728default\u5904\u4e0d\u52a0\u4e0abreak\u8bed\u53e5\u5462？\u8fd9\u662f\u56e0\u4e3adefault\u8bed\u53e5\u5728switch\u8bed\u53e5\u7684\u7ed3\u5c3e\u5904，\u82e5\u6267\u884c\u5b83\u4e4b\u540e，\u4e5f\u4f1a\u81ea\u52a8\u8df3\u51faswitch\u8bed\u53e5，\u5f80\u4e0b\u7ee7\u7eed\u6267\u884c\u3002<\/p>\n

\u6839\u636e\u5b9e\u9645\u9700\u6c42，\u6070\u5f53\u53bb\u4f7f\u7528break\u8bed\u53e5\u624d\u80fd\u53d1\u6325\u51fa\u6700\u5927\u7684\u4f5c\u7528\u3002<\/p>\n

3.switch\u8bed\u53e5\u7684default<\/h3>\n

\u5728\u4f7f\u7528switch\u8bed\u53e5\u65f6，\u8fd8\u4f1a\u7ecf\u5e38\u9047\u89c1\u4e00\u79cd\u60c5\u51b5，\u5f53switch\u8868\u8fbe\u5f0f\u7ed3\u679c\u4e0ecase\u4e0d\u80fd\u5339\u914d\u4e0a，\u9700\u8981\u53bb\u8bf4\u660e\u8fd9\u79cd\u60c5\u51b5，\u5c31\u5f97\u4f7f\u7528\u5230default\u8bed\u53e5\u4e86
\n\u5728\u4e0a\u9762\u4ee3\u7801\u4e2d，\u8f93\u51651-7，\u5224\u65ad\u5de5\u4f5c\u65e5\u548c\u4f11\u606f\u65e5，\u82e5\u8f93\u5165\u4e0d\u662f1-7\u8fd9\u51e0\u4e2a\u6570\u5b57，\u7a0b\u5e8f\u4f1a\u5339\u914d\u5230default\u8bed\u53e5，\u5e76\u8f93\u51fa\u8bed\u53e5\u63d0\u9192\u4f60<\/p>\n

4.switch\u8bed\u53e5\u7684case\u548cdefault\u7684\u987a\u5e8f\u95ee\u9898<\/h3>\n

\u5728switch\u8bed\u53e5\u4e2d，case\u4e00\u5b9a\u653e\u5728\u524d\u9762，default\u4e00\u5b9a\u653e\u5728case\u7684\u540e\u9762\u5417？
\n\u7b54：\u6ca1\u6709\u987a\u5e8f\u8981\u6c42，\u6ee1\u8db3\u9700\u6c42\u5c31\u53ef\u4ee5\u3002\u901a\u5e38\u4e60\u60ef\u628adefault\u653e\u5728case\u7684\u540e\u9762\u800c\u5df2，\u663e\u5f97\u903b\u8f91\u66f4\u6e05\u6670\u3002<\/p>\n

6.while\u5faa\u73af<\/h2>\n

1.if\u548cwhile\u5bf9\u6bd4<\/h3>\n

if<\/span>(<\/span>\u8868\u8fbe\u5f0f)<\/span>
\n \u8bed\u53e5<\/p>\n

while<\/span>(<\/span>\u8868\u8fbe\u5f0f)<\/span>
\n \u8bed\u53e5 \/\/\u591a\u6761\u8bed\u53e5\u540c\u6837\u662f\u7528{}\u62ec\u8d77\u6765<\/span><\/p>\n

\u4f8b\u5b50：\u7528if\u548cwhile\u5206\u522b\u6253\u5370hehe
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\nif\u6ee1\u8db3\u6761\u4ef6，\u6253\u5370\u4e00\u6b21hehe
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\nwhile\u6ee1\u8db3\u6761\u4ef6，\u6b7b\u5faa\u73af\u6253\u5370\u65e0\u6570\u4e2ahehe<\/p>\n

2.while\u7684\u6267\u884c\u6d41\u7a0b<\/h3>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\n\u6267\u884cwhile\u8bed\u53e5\u7684\u6d41\u7a0b：\u9996\u5148\u5224\u65ad\u8868\u8fbe\u5f0f\u7684\u503c\u7684\u771f\u5047，\u82e5\u503c\u4e0d\u4e3a0，\u6267\u884c\u62ec\u53f7\u5185\u7684\u8bed\u53e5，\u6267\u884c\u5b8c\u540e，\u518d\u56de\u5230\u8868\u8fbe\u5f0f\u5224\u65ad，\u662f\u5426\u8fdb\u884c\u4e0b\u4e00\u6b21\u5faa\u73af，\u76f4\u5230\u8868\u8fbe\u5f0f\u4e3a0，\u6267\u884c\u8df3\u8fc7\u8bed\u53e5，\u6267\u884c\u7ed3\u675f；\u82e5\u4e3a0，\u7ed3\u675f\u5faa\u73af\u3002<\/p>\n

3.while\u5faa\u73af\u7684\u5b9e\u8df5<\/h3>\n

\u7ec3\u4e601：\u5728\u5c4f\u5e55\u4e0a\u6253\u53701~10\u7684\u503c<\/p>\n

\/\/ \u5728\u5c4f\u5e55\u4e0a\u6253\u53701~10\u7684\u503c<\/span>
\n#<\/span>include<\/span> <stdio.h><\/span><\/span><\/p>\n

int<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> n =<\/span> 1<\/span>;<\/span>\/\/\u521d\u59cb\u5316\u4e3a1<\/span>
\nwhile<\/span> (<\/span>n <=<\/span> 10<\/span>)<\/span>\/\/n<=10，n\u6700\u5927\u523010；\u5927\u4e8e10，\u8868\u8fbe\u5f0f\u4e3a0，\u5faa\u73af\u7ed3\u675f<\/span>
\n{<\/span>
\nprintf<\/span>(<\/span>"%d "<\/span>,<\/span> n)<\/span>;<\/span>
\nn++<\/span>;<\/span>\/\/\u6bcf\u6b21\u5728n\u7684\u57fa\u7840\u4e0a\u52a01，\u53bb\u5f62\u6210\u4e00\u4e2a\u4ece1\u9012\u589e\u523010\u7684\u53d8\u5316<\/span>
\n}<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u7ec3\u4e602：\u8f93\u5165\u4e00\u4e2a\u6b63\u7684\u6574\u6570，\u9006\u5e8f\u6253\u5370\u8fd9\u4e2a\u6574\u6570\u7684\u6bcf\u4e00\u4f4d
\n\u4f8b\u5982：
\n\u8f93\u5165：1234，\u8f93\u51fa：4 3 2 1
\n\u8f93\u5165：521，\u8f93\u51fa：1 2 5<\/p>\n

\u4ee3\u7801\u793a\u4f8b：<\/p>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span><\/p>\n

int<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> n =<\/span> 0<\/span>;<\/span>
\nprintf<\/span>(<\/span>"\u8bf7\u8f93\u5165\u4e00\u4e2a\u6b63\u6574\u6570："<\/span>)<\/span>;<\/span>
\nscanf<\/span>(<\/span>"%d"<\/span>,<\/span> &<\/span>n)<\/span>;<\/span>
\nwhile<\/span> (<\/span>n)<\/span>
\n{<\/span>
\nprintf<\/span>(<\/span>"%d "<\/span>,<\/span> n %<\/span> 10<\/span>)<\/span>;<\/span>\/\/n\u90fd\u5bf910\u53d6\u4f59，\u5c31\u53ef\u4ee5\u5f97\u5230\u4e2a\u4f4d\u4e0a\u7684\u6570\u5b57<\/span>
\nn =<\/span> n \/<\/span> 10<\/span>;<\/span>
\n\/\/ \u6267\u884c\u4e00\u6b21n\/10\u53ef\u4ee5\u53bb\u6389\u6700\u4f4e\u4f4d\u4e0a\u7684\u6570\u5b57，\u627e\u5012\u6570\u7b2c\u4e8c\u4e2a\u6570\u5b57（\u4ece\u53f3\u5f80\u5de6\u6570\u7b2c2\u4f4d）<\/span>
\n\/\/ \u5982：n = 1234 \/ 10\u5f97\u5230123，123\u76f8\u8f83\u4e8e1234\u5c31\u53bb\u6389\u4e86\u6700\u4f4e\u4f4d，123 % 10\u5c31\u5f97\u5230\u5012\u6570\u7b2c\u2f06\u4f4d3\u3002<\/span>
\n \/\/ \u5728n\u53d8\u62100\u524d，\u53ef\u4ee5\u5f97\u5230\u6240\u6709\u4f4d<\/span>
\n}<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

7.for\u5faa\u73af<\/h2>\n

1.for\u5faa\u73af\u7684\u8bed\u6cd5\u5f62\u5f0f<\/h3>\n

for<\/span>(<\/span>\u8868\u8fbe\u5f0f1<\/span>;<\/span>\u8868\u8fbe\u5f0f2<\/span>;<\/span>\u8868\u8fbe\u5f0f3<\/span>)<\/span>
\n \u8bed\u53e5 \/\/\u82e5\u6709\u591a\u6761\u8bed\u53e5，\u7528{}\u62ec\u8d77\u6765<\/span><\/p>\n

\u8868\u8fbe\u5f0f1\u7528\u4e8e\u5faa\u73af\u53d8\u91cf\u7684\u521d\u59cb\u5316
\n\u8868\u8fbe\u5f0f2\u7528\u4e8e\u5faa\u73af\u7ed3\u675f\u6761\u4ef6\u5224\u65ad
\n\u8868\u8fbe\u5f0f3\u7528\u4e8e\u5faa\u73af\u53d8\u91cf\u7684\u8c03\u6574<\/p>\n

2.for\u5faa\u73af\u7684\u6267\u884c\u6d41\u7a0b<\/h3>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\n\u8fdb\u5165for\u5faa\u73af，\u7b2c\u4e00\u6b65\u5148\u6267\u884c\u8868\u8fbe\u5f0f1，\u5bf9\u5faa\u73af\u53d8\u91cf\u505a\u4e00\u4e2a\u521d\u59cb\u5316，\u7b2c\u4e8c\u6b65\u6267\u884c\u8868\u8fbe\u5f0f2，\u5bf9\u5faa\u73af\u53d8\u91cf\u7684\u503c\u8fdb\u884c\u5224\u65ad，\u52062\u79cd\u60c5\u51b5：（1）\u8868\u8fbe\u5f0f2\u5224\u65ad\u4e3a\u5047\u6216\u4e3a0\u65f6，\u5faa\u73af\u7ed3\u675f，\u5f80\u4e0b\u6267\u884c
\n（2）\u8868\u8fbe\u5f0f2\u5224\u65ad\u4e3a\u771f\u6216\u4e3a\u975e0\u6570，\u6267\u884c\u5faa\u73af\u5185\u7684\u8bed\u53e5，\u6267\u884c\u5b8c\u540e，\u518d\u6267\u884c\u8868\u8fbe\u5f0f3，\u5bf9\u5faa\u73af\u53d8\u91cf\u8fdb\u884c\u8c03\u6574，\u8c03\u6574\u540e\u5728\u8fdb\u884c\u8868\u8fbe\u5f0f2\u7684\u5224\u65ad，\u91cd\u590d\u64cd\u4f5c，\u76f4\u5230\u5224\u65ad\u4e3a\u5047\u65f6，\u6267\u884c（1）\u64cd\u4f5c\u3002<\/p>\n

\u00b7 \u6ce8：\u8868\u8fbe\u5f0f1\u5728\u6574\u4e2a\u5faa\u73af\u8fc7\u7a0b\u53ea\u6267\u884c1\u6b21<\/p>\n

3.for\u5faa\u73af\u7684\u5b9e\u8df5<\/h3>\n

\u5b66\u4e60\u5b8cfor\u5faa\u73af\u7684\u6267\u884c\u6d41\u7a0b，\u6211\u4eec\u6765\u5b9e\u8df5\u4e00\u4e0b\u5427
\n\u7ec3\u4e60：\u5728\u5c4f\u5e55\u4e0a\u6253\u53701~10\u7684\u503c<\/p>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span>
\nint<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> n =<\/span> 0<\/span>;<\/span>
\nfor<\/span> (<\/span>n =<\/span> 1<\/span>;<\/span> n <=<\/span> 10<\/span>;<\/span> n++<\/span>)<\/span>
\n{<\/span>
\nprintf<\/span>(<\/span>"%d "<\/span>,<\/span> n)<\/span>;<\/span>
\n}<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

4.while\u5faa\u73af\u548cfor\u5faa\u73af\u7684\u5bf9\u6bd4<\/h3>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\n\u901a\u8fc7\u5bf9\u6bd4，\u6211\u4eec\u53ef\u4ee5\u53d1\u73b0，while\u5faa\u73af\u7684\u521d\u59cb\u5316\u3001\u5224\u65ad\u6761\u4ef6\u3001\u8c03\u6574\u6bd4\u8f83\u5206\u6563，\u800cfor\u5faa\u73af\u6bd4\u8f83\u96c6\u4e2d，\u4fbf\u4e8e\u4ee3\u7801\u7684\u7ef4\u62a4，
\n\u4ece\u5f62\u5f0f\u4e0a\u6765\u8bf4，for\u5faa\u73af\u66f4\u4f18<\/p>\n

5.\u7ec3\u4e60<\/h3>\n

\u8ba1\u7b971~100\u4e4b\u95f43\u7684\u500d\u6570\u7684\u6570\u5b57\u4e4b\u548c<\/p>\n

\/\/\u601d\u8def1<\/span>
\n#<\/span>include<\/span> <stdio.h><\/span><\/span>
\nint<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> n =<\/span> 0<\/span>;<\/span>
\nint<\/span> sum =<\/span> 0<\/span>;<\/span>
\nfor<\/span> (<\/span>n =<\/span> 3<\/span>;<\/span> n <=<\/span> 100<\/span>;<\/span> n +=<\/span> 3<\/span>)<\/span>
\n{<\/span>
\nsum +=<\/span> n;<\/span>
\n}<\/span>
\nprintf<\/span>(<\/span>"\\\\n%d"<\/span>,<\/span> sum)<\/span>;<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\/\/\u601d\u8def2<\/span>
\n#<\/span>include<\/span> <stdio.h><\/span><\/span>
\nint<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> i =<\/span> 0<\/span>;<\/span>
\nint<\/span> sum =<\/span> 0<\/span>;<\/span>
\nfor<\/span> (<\/span>i =<\/span> 1<\/span>;<\/span> i <=<\/span> 100<\/span>;<\/span> i++<\/span>)<\/span>
\n{<\/span>
\nif<\/span> (<\/span>i %<\/span> 3<\/span> ==<\/span> 0<\/span>)<\/span>
\n{<\/span>
\nsum +=<\/span> i;<\/span>
\n}<\/span>
\n}<\/span>
\nprintf<\/span>(<\/span>"%d\\\\n"<\/span>,<\/span> sum)<\/span>;<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

8.do-while\u5faa\u73af<\/h2>\n

1.do-while\u5faa\u73af\u7684\u8bed\u6cd5\u5f62\u5f0f<\/h3>\n

do<\/span>
\n{<\/span>
\n \u8bed\u53e5;<\/span>
\n}<\/span>while<\/span>(<\/span>\u8868\u8fbe\u5f0f)<\/span>;<\/span><\/p>\n

2.do-while\u7684\u6267\u884c\u6d41\u7a0b<\/h3>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\ndo-while\u5faa\u73af\u7684\u6267\u884c\u6d41\u7a0b：\u7b2c\u4e00\u6b65\u5148\u6267\u884c\u62ec\u53f7\u5185\u7684\u8bed\u53e5，\u6267\u884c\u5b8c\u540e，\u7b2c\u4e8c\u6b65\u8fdb\u884c\u5faa\u73af\u6761\u4ef6\u7684\u5224\u65ad，\u5224\u65ad\u8868\u8fbe\u5f0f\u662f\u5426\u4e3a\u771f\u6216\u5047，\u82e5\u8868\u8fbe\u5f0f\u4e3a\u5047，\u5faa\u73af\u7ed3\u675f，\u5f80\u4e0b\u6267\u884c；\u82e5\u4e3a\u771f，\u5219\u6267\u884c\u62ec\u53f7\u5185\u7684\u8bed\u53e5，\u91cd\u590d\u64cd\u4f5c，\u76f4\u5230\u5224\u65ad\u8868\u8fbe\u5f0f\u4e3a\u5047\u65f6，\u5faa\u73af\u7ed3\u675f\u3002<\/p>\n

\u00b7 \u6ce8：do-while\u5faa\u73af\u81f3\u5c11\u6267\u884c1\u6b21\u62ec\u53f7\u5185\u7684\u8bed\u53e5<\/p>\n

3.do-while\u5faa\u73af\u7684\u5b9e\u8df5<\/h3>\n

\u7ec3\u4e601：\u5728\u5c4f\u5e55\u4e0a\u6253\u53701~10\u7684\u503c<\/p>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span>
\nint<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> n =<\/span> 1<\/span>;<\/span> \/\/\u521d\u59cb\u5316<\/span>
\ndo<\/span>
\n{<\/span>
\nprintf<\/span>(<\/span>"%d "<\/span>,<\/span> n)<\/span>;<\/span>
\nn++<\/span>;<\/span>
\n}<\/span> while<\/span> (<\/span>n <=<\/span> 10<\/span>)<\/span>;<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u7ec3\u4e602：\u8f93\u5165\u4e00\u4e2a\u6b63\u6574\u6570，\u8ba1\u7b97\u8fd9\u4e2a\u6570\u662f\u51e0\u4f4d\u6570？
\n\u4f8b\u5982：
\n\u8f93\u5165：1234 \u8f93\u51fa：4
\n\u8f93\u5165：123 \u8f93\u51fa：3<\/p>\n

\u601d\u8def：
\n\u5982123\/10=12，\u53bb\u6389\u4e00\u4f4d3，\u4f4d\u6570\u52a01
\n12\/10=2，\u53bb\u6389\u4e00\u4f4d2，\u4f4d\u6570\u52a01
\n2\/10=0，\u53bb\u6389\u4e00\u4f4d1，\u4f4d\u6570\u52a01
\n0
\n\u4ece\u53f3\u5f80\u5de6\u6570，\u6bcf\u966410，\u4f4d\u6570\u52a01，\u6211\u4eec\u7528do-while\u5faa\u73af\u5c1d\u8bd5\u5199\u51fa\u4ee3\u7801<\/p>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span>
\nint<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> n =<\/span> 0<\/span>;<\/span> \/\/n\u4e3a\u5faa\u73af\u53d8\u91cf<\/span>
\nint<\/span> i =<\/span> 0<\/span>;<\/span> \/\/i\u4e3a\u8bb0\u5f55\u4f4d\u6570<\/span>
\nprintf<\/span>(<\/span>"\u8bf7\u8f93\u5165\u4e00\u4e2a\u6b63\u6574\u6570："<\/span>)<\/span>;<\/span>
\nscanf<\/span>(<\/span>"%d"<\/span>,<\/span> &<\/span>n)<\/span>;<\/span>
\ndo<\/span>
\n{<\/span>
\nn \/=<\/span> 10<\/span>;<\/span> \/\/\u53bb\u6389\u4e00\u4f4d<\/span>
\ni++<\/span>;<\/span> \/\/\u4f4d\u6570\u52a01<\/span>
\n}<\/span> while<\/span> (<\/span>n)<\/span>;<\/span> \/\/\u5f53n=0\u65f6，\u4f4d\u6570\u5df2\u7ecf\u5168\u90e8\u8ba1\u7b97\u5b8c，\u540c\u65f6n\u5224\u65ad\u4e3a\u5047，\u5faa\u73af\u7ed3\u675f<\/span>
\nprintf<\/span>(<\/span>"\u8be5\u6b63\u6574\u6570\u4e3a%d\u4f4d\u6570\\\\n"<\/span>,<\/span> i)<\/span>;<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

9.break\u548ccontinue\u8bed\u53e5<\/h2>\n

\u5728\u5faa\u73af\u6267\u884c\u7684\u8fc7\u7a0b\u4e2d，\u5982\u679c\u67d0\u4e9b\u72b6\u51b5\u53d1\u751f\u7684\u65f6\u5019，\u9700\u8981\u63d0\u524d\u7ec8\u6b62\u5faa\u73af，\u8fd9\u662f\u975e\u5e38\u5e38\u89c1\u7684\u73b0\u8c61\u3002C\u8bed\u8a00\u63d0\u4f9b\u4e86\u4e24\u4e2a\u7ec8\u6b62\u5faa\u73af\u7684\u5173\u952e\u5b57break\u548ccontinue\u3002
\nbreak\u8bed\u53e5：\u6c38\u4e45\u7ec8\u6b62\u5faa\u73af，\u6267\u884cbreak\u8bed\u53e5，\u7ed3\u675f\u5faa\u73af，\u5f80\u4e0b\u6267\u884c\u3002\u82e5\u5728\u591a\u5c42\u5faa\u73af\u4e2d，break\u8bed\u53e5\u4ec5\u8df3\u51fa\u5f53\u524d\u7684\u4e00\u6b21\u5faa\u73af\u3002
\ncontinue\u8bed\u53e5：\u8df3\u8fc7\u672c\u6b21\u5faa\u73afcontinue\u5faa\u73af\u540e\u9762\u7684\u4ee3\u7801\u3002<\/p>\n

\u4f8b1.
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\ni=1\u30012\u30013\u30014\u6b63\u5e38\u6267\u884c，\u5f53\u8f93\u51fa4\u540e，i++,\u5f97\u52305\u65f6，\u5224\u65ad5<=10，\u8fdb\u884cif\u5224\u65ad，\u6267\u884cbreak\u8bed\u53e5，\u8df3\u51fawhile\u5faa\u73af，\u7a0b\u5e8f\u8fd0\u884c\u7ed3\u675f\u3002<\/p>\n

\u4f8b2.
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\ni=1\u30012\u30013\u30014\u6b63\u5e38\u6267\u884c，\u5f53\u8f93\u51fa4\u540e，i++,\u5f97\u52305\u65f6，\u5224\u65ad5<=10，\u8fdb\u884cif\u5224\u65ad，\u6267\u884ccontinue\u8bed\u53e5，\u8df3\u8fc7printf\u548ci++\u7684\u4ee3\u7801\u90e8\u5206，i=5\u6ca1\u6709\u8fdb\u884c\u8c03\u6574，\u7ee7\u7eed\u5224\u65ad5<=10，\u8fdb\u884cif\u5224\u65ad，\u6267\u884ccontinue\u8bed\u53e5，\u8df3\u8fc7printf\u548ci++\u7684\u4ee3\u7801\u90e8\u5206，\u9677\u5165\u6b7b\u5faa\u73af\u3002<\/p>\n

\u4f8b3.
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\n\u5148\u8fdb\u884ci++,i=2\u30013\u30014\u6b63\u5e38\u6267\u884c，\u5f53\u8f93\u51fa4\u540e，i++,\u5f97\u52305\u65f6，\u5224\u65ad5<=10，\u8fdb\u884cif\u5224\u65ad，\u6267\u884ccontinue\u8bed\u53e5，\u8df3\u8fc7printf，\u8fdb\u884ci++,i=6\u30017\u30018\u30019\u300110\u6b63\u5e38\u6267\u884c，i=10\u8f93\u51fa\u540e，\u5224\u65ad10<=10，i++,\u5224\u65adif，\u518d\u8f93\u51fa11，11<=10，\u5faa\u73af\u7ed3\u675f\u3002
\n\u4f8b4.
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\ni=1\u30012\u30013\u30014\u6b63\u5e38\u6267\u884c\u8f93\u51fa，\u5f53i=5\u65f6，\u6267\u884cbreak\u8bed\u53e5，\u8df3\u51fafor\u5faa\u73af<\/p>\n

\u4f8b5.
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\ni=1\u30012\u30013\u30014\u6b63\u5e38\u6267\u884c\u8f93\u51fa，\u5f53i=5\u65f6，\u6267\u884ccontinue\u8bed\u53e5，\u8df3\u8fc7printf\u8bed\u53e5，i++,i\u53d8\u62106\u540e，i=6\u30017\u30018\u30019\u300110\u6b63\u5e38\u6267\u884c\u8f93\u51fa，i=10\u8f93\u51fa\u540e，i++，i=11，\u5224\u65ad11<=10，\u5faa\u73af\u7ed3\u675f\u3002<\/p>\n

\u4f8b6.
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\ni=1\u30012\u30013\u30014\u6b63\u5e38\u6267\u884c\u8f93\u51fa，\u5f53i=5\u65f6，\u6267\u884cbreak\u8bed\u53e5，\u8df3\u51fado-while\u5faa\u73af,\u5f80\u4e0b\u6267\u884c\u3002<\/p>\n

10.\u5faa\u73af\u7684\u5d4c\u5957<\/h2>\n

\u7ec3\u4e60：
\n\u627e\u51fa100~200\u4e4b\u95f4\u7684\u7d20\u6570，\u5e76\u6253\u5370\u5728\u5c4f\u5e55\u4e0a\u3002
\n\u6ce8：\u7d20\u6570\u53c8\u79f0\u8d28\u6570，\u53ea\u80fd\u88ab1\u548c\u672c\u8eab\u6574\u9664\u7684\u6570\u5b57<\/p>\n

\u601d\u8def：
\n（1）\u5148\u751f\u6210100~200\u4e4b\u95f4\u7684\u6570\u2013for\u5faa\u73af
\n（2）\u5047\u8bbe\u8981\u5224\u65adi\u662f\u5426\u4e3a\u7d20\u6570，\u9700\u8981\u62ff2\u5230i-1\u4e4b\u95f4\u7684\u6570\u5b57\u53bb\u8bd5\u9664i，\u9700\u8981\u4ea7\u751f2\u5230i-1\u4e4b\u95f4\u7684\u6570\u5b57\u2013for\u5faa\u73af
\n（3）\u5982\u679c2~i-1\u4e4b\u95f4\u6709\u6570\u5b57\u80fd\u6574\u9664i，\u5219i\u4e0d\u662f\u7d20\u6570，\u5982\u679c\u90fd\u4e0d\u80fd\u6574\u9664，\u5219i\u662f\u7d20\u6570\u2013if\u5224\u65ad<\/p>\n

\u6839\u636e\u4ee5\u4e0a\u601d\u8def，\u5199\u51fa\u4ee3\u7801<\/p>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span>
\nint<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\nint<\/span> i =<\/span> 0<\/span>;<\/span> \/\/\u5b58\u50a8100~200\u7684\u6570\u5b57\u7684\u53d8\u91cf<\/span>
\nfor<\/span> (<\/span>i =<\/span> 100<\/span>;<\/span> i <=<\/span> 200<\/span>;<\/span> i++<\/span>)<\/span> \/\/\u751f\u6210100~200\u7684\u6570\u5b57<\/span>
\n{<\/span>
\nint<\/span> flag =<\/span> 1<\/span>;<\/span> \/\/\u5148\u5047\u8bbei\u662f\u7d20\u6570<\/span>
\nint<\/span> j =<\/span> 0<\/span>;<\/span>\/\/\u5b58\u50a82~i-1\u7684\u6570\u5b57\u7684\u53d8\u91cf<\/span>
\n\/\/\u751f\u62102~i-1\u7684\u6570\u5b57<\/span>
\nfor<\/span> (<\/span>j =<\/span> 2<\/span>;<\/span> j <=<\/span> i –<\/span> 1<\/span>;<\/span> j++<\/span>)<\/span>
\n{<\/span>
\n\/\/\u5bf9\u7d20\u6570\u8fdb\u884c\u5224\u65ad<\/span>
\nif<\/span> (<\/span>i %<\/span> j ==<\/span> 0<\/span>)<\/span> \/\/\u8bf4\u660ei\u4e0d\u662f\u7d20\u6570<\/span>
\n{<\/span>
\nflag =<\/span> 0<\/span>;<\/span> \/\/i\u4e0d\u662f\u7d20\u6570,\u6539\u53d8flag\u7684\u72b6\u6001<\/span>
\nbreak<\/span>;<\/span> \/\/\u53ea\u8981i\u88ab2~i-1\u4e2d\u4e00\u4e2a\u6570\u6574\u9664\u4e86，\u5c31\u4e0d\u7528\u6d6a\u8d39\u65f6\u95f4\u5f80\u4e0b\u5224\u65ad\u4e86,\u8df3\u51fa\u5faa\u73af<\/span>
\n}<\/span>
\n}<\/span>
\nif<\/span> (<\/span>flag ==<\/span> 1<\/span>)<\/span> \/\/\u5f53flag\u72b6\u6001\u6ca1\u6709\u88ab\u6539\u53d8，\u5faa\u73af\u7ed3\u675f\u662fj>i-1\u65f6，\u8bf4\u660eif\u8bed\u53e5\u6ca1\u88ab\u6267\u884c\u8fc7，i\u662f\u7d20\u6570<\/span>
\n{<\/span>
\nprintf<\/span>(<\/span>"%d "<\/span>,<\/span> i)<\/span>;<\/span>
\n}<\/span><\/p>\n

}<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

11.goto\u8bed\u53e5<\/h2>\n

\u5728C\u8bed\u8a00\u4e2d\u6709\u4e00\u79cd\u7279\u522b\u7684\u8bed\u6cd5，\u662fgoto\u8bed\u53e5\u548c\u8df3\u8f6c\u6807\u53f7，goto\u8bed\u53e5\u53ef\u4ee5\u5b9e\u73b0\u5728\u540c\u4e00\u4e2a\u51fd\u6570\u5185\u8df3\u8f6c\u5230\u8bbe\u7f6e\u597d\u7684\u6807\u53f7\u5904
\n\u4f8b1：<\/p>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span><\/p>\n

int<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\ngoto<\/span> next;<\/span>
\nprintf<\/span>(<\/span>"hehe\\\\n"<\/span>)<\/span>;<\/span>
\nprintf<\/span>(<\/span>"haha\\\\n"<\/span>)<\/span>;<\/span>
\nnext :<\/span>
\nprintf<\/span>(<\/span>"heihei\\\\n"<\/span>)<\/span>;<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\/\/\u539f\u672c\u662f\u8981\u6253\u5370hehe\u548chaha\u7684，\u4f46\u662fgoto\u8bed\u53e5\u8df3\u8fc7\u8fd92\u53e5\u7684\u8f93\u51fa，\u76f4\u63a5\u8f93\u51faheihei<\/span>
\n\/\/goto\u8bed\u53e5\u4f7f\u7528\u5c3d\u91cf\u662fgoto\u5728\u524d，\u8df3\u8f6c\u6807\u53f7\u5728\u540e，\u5426\u5219\u53ef\u80fd\u4f1a\u9020\u6210\u6b7b\u5faa\u73af<\/span><\/p>\n

\u4e00\u822c\u4e0d\u4f7f\u7528，\u9002\u7528\u4e8e\u591a\u5c42\u5faa\u73af\u7684\u4ee3\u7801\u4e2d，\u60f3\u8981\u5feb\u901f\u8df3\u51fa\u5faa\u73af\u7684\u60c5\u51b5<\/p>\n

12. \u603b\u7ed3<\/h2>\n

\u672c\u6587\u5168\u9762\u4ecb\u7ecd\u4e86C\u8bed\u8a00\u4e2d\u7684\u5206\u652f\u548c\u5faa\u73af\u7ed3\u6784，\u8fd9\u662f\u6784\u5efa\u7a0b\u5e8f\u903b\u8f91\u63a7\u5236\u7684\u57fa\u7840\u3002\u4e3b\u8981\u5185\u5bb9\u603b\u7ed3\u5982\u4e0b：<\/p>\n

\u4e00\u3001\u5206\u652f\u7ed3\u6784<\/h3>\n
  • \n

    if\u8bed\u53e5：\u5305\u62ec\u57fa\u672cif\u3001if-else\u3001\u5d4c\u5957if\u548c\u60ac\u7a7aelse\u95ee\u9898<\/p>\n