{"id":88701,"date":"2026-08-01T16:48:52","date_gmt":"2026-08-01T08:48:52","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/88701.html"},"modified":"2026-08-01T16:48:52","modified_gmt":"2026-08-01T08:48:52","slug":"c%e8%af%ad%e8%a8%80%ef%bc%881%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/88701.html","title":{"rendered":"C\u8bed\u8a00\uff081\uff09"},"content":{"rendered":"

\u8ba1\u7b97\u673a\u57fa\u7840<\/h4>\n

\u8ba1\u7b97\u673a\u7684\u7ec4\u6210<\/h5>\n
\u8ba1\u7b97\u673a\u7684\u5b9a\u4e49<\/h6>\n

\u8ba1\u7b97\u673a：\u80fd\u8fdb\u884c\u8ba1\u7b97\u53ca\u903b\u8f91\u5904\u7406\u7684\u8bbe\u5907\u3002<\/p>\n

\u786c\u4ef6：\u7ec4\u6210\u8ba1\u7b97\u673a\u7684\u7269\u7406\u90e8\u4ef6（\u786c\u76d8，\u5185\u5b58\u6761，CPU\u7b49）<\/p>\n

\u200b\u5f00\u53d1\u4e2d\u5bf9\u4e8e\u786c\u4ef6\u7684\u8ba4\u77e5：\u786c\u4ef6\u5305\u62ec\u7535\u5b50\u8bbe\u5907\u3001\u5355\u7247\u673a\u3001\u96c6\u6210\u7535\u8def\u548c\u5d4c\u5165\u5f0f\u7cfb\u7edf\u3002<\/p>\n

\u8f6f\u4ef6：\u8ba1\u7b97\u673a\u4e2d\u8fd0\u884c\u7684\u7a0b\u5e8f\u548c\u6570\u636e<\/p>\n

\u200b\u5f00\u53d1\u4e2d\u5bf9\u4e8e\u8f6f\u4ef6\u7684\u8ba4\u77e5：\u8f6f\u4ef6\u5206\u4e3a\u7cfb\u7edf\u8f6f\u4ef6（OS）\u3001\u5e94\u7528\u8f6f\u4ef6\u3001\u7f16\u7a0b\u5de5\u5177（\u7f16\u8bd1\u5668）<\/p>\n

\u8ba1\u7b97\u673a\u7684\u516d\u5927\u90e8\u4ef6<\/h6>\n

\u4e2d\u592e\u5904\u7406\u5668（CPU）:\u8d1f\u8d23\u63a7\u5236\u6307\u4ee4\u6267\u884c\u548c\u6570\u636e\u8ba1\u7b97\u3002<\/p>\n

\u5185\u5b58：\u4e34\u65f6\u5b58\u50a8\u7a0b\u5e8f\u8fd0\u884c\u65f6\u7684\u6307\u4ee4\u548c\u6570\u636e\u3002<\/p>\n

\u8f93\u5165\u8bbe\u5907：\u5411\u8ba1\u7b97\u673a\u8f93\u5165\u6570\u636e（\u9f20\u6807，\u952e\u76d8，\u626b\u7801\u67aa\u7b49）\u3002<\/p>\n

\u8f93\u51fa\u8bbe\u5907：\u5c06\u8ba1\u7b97\u673a\u5904\u7406\u7ed3\u679c\u8f93\u51fa（\u663e\u793a\u5668，\u6253\u5370\u673a\u7b49）\u3002<\/p>\n

\u5916\u5b58\u8bbe\u5907：\u6c38\u4e45\u5b58\u50a8\u6570\u636e（\u786c\u76d8，U\u76d8\u7b49）\u3002<\/p>\n

\u7f51\u7edc：\u5b9e\u73b0\u8bbe\u5907\u95f4\u6570\u636e\u7684\u4f20\u8f93\u548c\u901a\u8baf\u3002<\/p>\n

\u8ba1\u7b97\u673a\u5de5\u4f5c\u539f\u7406<\/h6>\n

\u5b58\u50a8\u7a0b\u5e8f：\u7a0b\u5e8f\u548c\u6570\u636e\u9884\u5148\u5b58\u50a8\u5728\u5185\u5b58\u91cc\u3002<\/p>\n

\u7a0b\u5e8f\u63a7\u5236：CPU\u6309\u7167\u6307\u4ee4\u987a\u5e8f\u9010\u6761\u6267\u884c\u64cd\u4f5c\u3002<\/p>\n

\u8ba1\u7b97\u673a\u5de5\u4f5c\u8bed\u8a00<\/h6>\n\n\u8bed\u8a00\u7c7b\u578b\u7279\u70b9\u793a\u4f8b<\/tr>\n\n\n\n\n
\u673a\u5668\u8bed\u8a00<\/td>\n\u4e8c\u8fdb\u5236\u4ee3\u7801，\u53ef\u76f4\u63a5\u63a7\u5236\u786c\u4ef6，\u6267\u884c\u6548\u7387\u6700\u9ad8<\/td>\n1011110 010100010<\/td>\n<\/tr>\n
\u6c47\u7f16\u8bed\u8a00<\/td>\n\u7528\u52a9\u8bb0\u7b26\u8868\u793a\u673a\u5668\u6307\u4ee4，\u9700\u901a\u8fc7\u6c47\u7f16\u5668\u7ffb\u8bd1\u4e3a\u673a\u5668\u8bed\u8a00<\/td>\nMOV AL, 61h0\u3001<\/td>\n<\/tr>\n
\u9ad8\u7ea7\u8bed\u8a00<\/td>\n\u8d34\u8fd1\u4eba\u7c7b\u81ea\u7136\u8bed\u8a00，\u53ef\u8bfb\u6027\u5f3a，\u9700\u8981\u7f16\u8bd1\/\u89e3\u91ca\u6267\u884c<\/td>\nprintf(\u201chello world\u201d)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u8bed\u8a00\u7a0b\u5e8f\u7684\u5f00\u53d1\u8fc7\u7a0b<\/h4>\n

\u5f00\u53d1\u7684\u4e09\u4e2a\u6b65\u9aa4<\/h5>\n

\u2460\u7f16\u8f91：\u7a0b\u5e8f\u5458\u7f16\u5199\u6e90\u7a0b\u5e8f .c\u6587\u4ef6\u3002<\/p>\n

\u2461\u7f16\u8bd1：\u7f16\u8bd1\u5668\u5c06\u6e90\u4ee3\u7801\u8f6c\u6362\u4e3a\u53ef\u6267\u884c\u7684\u4e8c\u8fdb\u5236\u6307\u4ee4\u6587\u4ef6\u3002<\/p>\n

\u2462\u8fd0\u884c：\u64cd\u4f5c\u7cfb\u7edf\u52a0\u8f7d\u5e76\u6267\u884c\u53ef\u6267\u884c\u4e8c\u8fdb\u5236\u7a0b\u5e8f\u3002<\/p>\n

C\u8bed\u8a00\u7a0b\u5e8f\u7684\u7f16\u8bd1\u8fc7\u7a0b<\/h5>\n

\u4e0a\u9762\u63d0\u5230\u7f16\u8bd1\u5206\u4e3a\u56db\u4e2a\u6b65\u9aa4：<\/p>\n

\u9884\u5904\u7406<\/h6>\n

\u9884\u5904\u7406：\u8f6f\u4ef6\u5206\u4e3a\u7cfb\u7edf\u8f6f\u4ef6（OS）\u3001\u5e94\u7528\u8f6f\u4ef6\u3001\u7f16\u7a0b\u5de5\u5177（\u7f16\u8bd1\u5668）：\u5904\u7406\u5b8f\u5b9a\u4e49（#define）,\u5934\u6587\u4ef6\u5305\u542b（#include）\u3001\u6ce8\u91ca\u7b49，\u5c06\u5934\u6587\u4ef6\u5185\u5bb9\u76f4\u63a5\u62f7\u8d1d\u5230\u5f53\u524d\u6587\u4ef6\u3002\u9884\u5904\u7406\u9700\u8981\u7528\u5230\u9884\u5904\u7406\u5668\u3002<\/p>\n

\u547d\u4ee4：gcc -E *.c -o *.i<\/p>\n

\u6587\u4ef6\u7c7b\u578b\u8f6c\u6362：*.c \u2192 *.i<\/p>\n

\u8bf4\u660e：\u751f\u6210\u9884\u5904\u7406\u540e\u7684C\u4ee3\u7801（\u6587\u672c\u6587\u4ef6）<\/p>\n

yueqian@yueqian-vm:~$ gcc -E<\/span> deom1.c -o<\/span> deom1.i
\nyueqian@yueqian-vm:~$ cat<\/span> deom1.i<\/p>\n

\u7f16\u8bd1<\/h6>\n

\u7f16\u8bd1：\u5bf9\u9884\u5904\u7406\u540e\u7684\u4ee3\u7801\u8fdb\u884c\u8bed\u6cd5\u5206\u6790，\u8bed\u4e49\u68c0\u67e5，\u751f\u6210\u6c47\u7f16\u8bed\u8a00\u4ee3\u7801\u3002\u7f16\u8bd1\u8981\u7528\u5230\u7f16\u8bd1\u5668\u3002<\/p>\n

\u547d\u4ee4：gcc -S *.c -o *.s<\/p>\n

\u6587\u4ef6\u7c7b\u578b\u8f6c\u6362：.i\/.c \u2192 *.s<\/p>\n

\u8bf4\u660e：\u751f\u6210\u6c47\u7f16\u4ee3\u7801（\u6587\u672c\u6587\u4ef6）<\/p>\n

yueqian@yueqian-vm:~$ gcc -S<\/span> deom1.i -o<\/span> deom1.s
\nyueqian@yueqian-vm:~$ cat<\/span> deom1.s<\/p>\n

\u6c47\u7f16<\/h6>\n

.\u6c47\u7f16：\u5c06\u6c47\u7f16\u4ee3\u7801\u8f6c\u6362\u4e3a\u4e8c\u8fdb\u5236\u4ee3\u7801，\u751f\u6210\u76ee\u6807\u6587\u4ef6\u3002\u6c47\u7f16\u8981\u7528\u5230\u6c47\u7f16\u5668\u3002<\/p>\n

\u547d\u4ee4：gcc -c *.s -o *.o<\/p>\n

\u6587\u4ef6\u7c7b\u578b\u8f6c\u6362：*.s \u2192 *.o<\/p>\n

\u8bf4\u660e：\u5c06\u6c47\u7f16\u4ee3\u7801\u8f6c\u4e3a\u4e8c\u8fdb\u5236\u76ee\u6807\u6587\u4ef6（\u6ce8：gcc -c *.c \u7b49\u4ef7\u4e8e\u9884\u5904\u7406+\u7f16\u8bd1+\u6c47\u7f16\u4e09\u6b65）<\/p>\n

yueqian@yueqian-vm:~$ gcc -c<\/span> deom1.s -o<\/span> deom1.o
\nyueqian@yueqian-vm:~$ cat<\/span> deom1.o<\/p>\n

\u94fe\u63a5<\/h6>\n

\u94fe\u63a5：\u5c06\u76ee\u6807\u6587\u4ef6\u4e0e\u7cfb\u7edf\u5e93\u6587\u4ef6\u3001\u5176\u4ed6\u76ee\u6807\u6587\u4ef6\u5408\u5e76，\u751f\u6210\u53ef\u6267\u884c\u6587\u4ef6\u3002\u94fe\u63a5\u8981\u7528\u5230\u94fe\u63a5\u5668\u3002<\/p>\n

\u547d\u4ee4：gcc *.c -o *<\/p>\n

\u6587\u4ef6\u7c7b\u578b\u8f6c\u6362：*.o \u2192\u53ef\u6267\u884c\u6587\u4ef6<\/p>\n

\u8bf4\u660e：\u751f\u6210\u53ef\u6267\u884c\u4e8c\u8fdb\u5236\u6587\u4ef6<\/p>\n

C\u8bed\u8a00\u7a0b\u5e8f\u7684\u57fa\u672c\u7ed3\u6784<\/h4>\n

\u4e00\u4e2a\u7b80\u5355\u7684C\u8bed\u8a00\u7a0b\u5e8f<\/h5>\n

\u529f\u80fd：\u5728\u63a7\u5236\u53f0(\u7ec8\u7aef)\u8f93\u51fa\u201cHello World!\u201d<\/p>\n

\/*************************************************************************
\n > File Name: deom1.c
\n > Author: \u848b\u6587\u8f89
\n > Description:
\n > Created Time: 2026\u5e7407\u670828\u65e5 \u661f\u671f\u4e8c 19\u65f634\u520638\u79d2
\n ************************************************************************\/<\/span><\/p>\n

#<\/span>include<\/span> <stdio.h><\/span>\/\/\u5f15\u5165\u8f93\u5165\u8f93\u51fa\u6807\u51c6\u5e93\u5934\u6587\u4ef6，printf()\u9700\u8981\u8fd9\u4e2a\u5934\u6587\u4ef6<\/span><\/span><\/p>\n

\/\/\u4e3b\u51fd\u6570：\u4e00\u4e2a*.c\u6709\u4e14\u4ec5\u67091\u4e2a\u4e3b\u51fd\u6570，\u4f5c\u4e3a\u7a0b\u5e8f\u7684\u5165\u53e3，\u8fd9\u4e2a\u51fd\u6570\u5728\u7a0b\u5e8f\u8fd0\u884c\u540e\u81ea\u52a8\u6267\u884c<\/span>
\nint<\/span> main<\/span>(<\/span>int<\/span> argc,<\/span>char<\/span> *<\/span>argv[<\/span>]<\/span>)<\/span>
\n{<\/span>
\n \/\/C\u6807\u51c6\u5e93\u63d0\u4f9b\u7684\u51fd\u6570：\u5411\u63a7\u5236\u53f0\u8f93\u51faHello World，\\\\n\u662f\u6362\u884c\u7684\u610f\u601d，\u9700\u8981\u5f15\u7528<stdio.h><\/span>
\n printf<\/span>(<\/span>"Hello World\\\\n"<\/span>)<\/span>;<\/span>
\n return<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

#\u8fd0\u884c\u7ed3\u679c<\/span>
\nyueqian@yueqian-vm:~$ .\/a.out
\nHello World<\/p>\n

\u7a0b\u5e8f\u7ed3\u6784\u5206\u6790<\/h5>\n

\u2460\u6ce8\u91ca：\u7528\u4e8e\u89e3\u91ca\u4ee3\u7801\u903b\u8f91，\u4ec5\u7ed9\u7a0b\u5e8f\u5458\u9605\u8bfb\u3002\u6ce8\u91ca\u5728\u7f16\u8bd1\u7684\u65e9\u671f\u7ffb\u8bd1\u9636\u6bb5(\u9884\u5904\u7406)\u88ab\u66ff\u6362\u4e3a\u7a7a\u683c，\u4e0d\u53c2\u4e0e\u540e\u7eed\u7f16\u8bd1\u3002<\/p>\n

\u2461\u9884\u5904\u7406\u6307\u4ee4：\u4ee5 # \u5f00\u5934，\u7528\u4e8e\u5305\u542b\u5934\u6587\u4ef6\u3001\u5b8f\u5b9a\u4e49\u7b49，\u5982 #include <stdio.h> ， #define PI 3.1415926\u3002<\/p>\n

\u2462\u4e3b\u51fd\u6570（ main \u51fd\u6570）：\u7a0b\u5e8f\u7684\u552f\u4e00\u5165\u53e3，\u7531\u64cd\u4f5c\u7cfb\u7edf\u901a\u8fc7\u7a0b\u5e8f\u542f\u52a8\u673a\u5236\u81ea\u52a8\u8c03\u7528，\u4e0d\u80fd\u88ab\u7a0b\u5e8f\u5458\u81ea\u5b9a\u4e49\u51fd\u6570\u8c03\u7528\u3002<\/p>\n

\u2463\u51fd\u6570\u7ec4\u6210：<\/p>\n

\u200b\u2013 \u51fd\u6570\u5934：\u8bf4\u660e\u51fd\u6570\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u3001\u51fd\u6570\u540d\u548c\u53c2\u6570\u5217\u8868\u3002\u5728C\u8bed\u8a00\u4e2d， int main(void) \u660e\u786e\u8868\u793a\u65e0\u53c2\u6570，int main() \u8868\u793a\u53c2\u6570\u672a\u6307\u5b9a（\u4e0eC++\u4e0d\u540c，C\u4e2d\u4e8c\u8005\u8bed\u4e49\u6709\u533a\u522b）\u3002\u82e5\u65e0\u53c2\u6570，\u5efa\u8bae\u7edf\u4e00\u4f7f\u7528 intmain(void) \u6216 int main(int argc, char *argv[])<\/p>\n

\u200b\u2013 \u51fd\u6570\u4f53：\u7528 {} \u62ec\u8d77\u6765，\u5305\u542b\u53d8\u91cf\u58f0\u660e\u548c\u8bed\u53e5\u6267\u884c\u7684\u90e8\u5206（\u8bed\u53e5\u4ee5 ; \u7ed3\u5c3e）<\/p>\n

\u2464\u51fd\u6570\u8c03\u7528\u8bed\u53e5：\u8c03\u7528\u5df2\u5b9a\u4e49\u7684\u51fd\u6570（\u5982： printf ，\u662f\u6807\u51c6\u5e93\u4e2d\u7684\u8f93\u51fa\u51fd\u6570）<\/p>\n

C\u8bed\u2f94\u7f16\u7a0b\u89c4\u8303<\/h5>\n

C\u8bed\u8a00\u7f16\u7a0b\u9700\u8981\u9075\u5faa\u4ee5\u4e0b\u89c4\u8303，\u63d0\u5347\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027<\/p>\n

\u7f29\u8fdb\u683c\u5f0f<\/h6>\n

\u63a8\u8350\u7f29\u8fdb4\u4e2a\u7a7a\u683c（\u6216\u914d\u7f6e\u7f16\u8f91\u5668\u5c06Tab\u952e\u663e\u793a\u5bbd\u5ea6\u8bbe\u4e3a4\u4e2a\u5b57\u7b26），\u7edf\u4e00\u4ee3\u7801\u5c42\u7ea7\u3002<\/p>\n

\u2f9c\u591f\u6ce8\u91ca<\/h6>\n

\u5bf9\u4e8e\u5173\u952e\u4ee3\u7801（\u5982\u51fd\u6570\u529f\u80fd\u3001\u590d\u6742\u903b\u8f91\u3001\u53d8\u91cf\u542b\u4e49）\u6dfb\u52a0\u6ce8\u91ca\u3002<\/p>\n

\u5408\u9002\u7a7a\u2f8f<\/h6>\n

\u9884\u5904\u7406\u6307\u4ee4\u4e0e\u51fd\u6570\u4e4b\u95f4\u3001\u51fd\u6570\u4e0e\u51fd\u6570\u4e4b\u95f4\u3001\u5168\u5c40\u53d8\u91cf\u4e0e\u51fd\u6570\u4e4b\u95f4\u6dfb\u52a0\u7a7a\u884c，\u533a\u5206\u4ee3\u7801\u6a21\u5757：<\/p>\n

\/*************************************************************************
\n > File Name: deom1.c
\n > Author: \u848b\u6587\u8f89
\n > Description:
\n > Created Time: 2026\u5e7407\u670828\u65e5 \u661f\u671f\u4e8c 20\u65f610\u520645\u79d2
\n ************************************************************************\/<\/span>
\n\/\/ \u5305\u542b\u5934\u6587\u4ef6，\u9884\u5904\u7406\u65f6，\u4f1a\u5c06\u5bf9\u5e94\u7684.h\u6587\u4ef6\u4ee3\u7801\u5168\u90e8\u62f7\u8d1d\u5230\u5f53\u524d\u6587\u4ef6\u4f4d\u7f6e<\/span>
\n#<\/span>include<\/span> <stdio.h><\/span><\/span>
\n#<\/span>include<\/span> <stdlib.h><\/span><\/span><\/p>\n

\/\/ \u5b8f\u5b9a\u4e49：\u9884\u5904\u7406\u9636\u6bb5，\u4f1a\u4f7f\u7528\u5b8f\u503c\u66ff\u6362\u6389\u5b8f\u540d\u79f0，\u79f0\u4f5c\u5b8f\u5c55\u5f00<\/span>
\n#<\/span>define<\/span> R<\/span> 2<\/span> <\/span>\/\/ \u5b9a\u4e49\u4e00\u4e2a\u534a\u5f84<\/span><\/span>
\n#<\/span>define<\/span> PI<\/span> 3.1415926<\/span><\/span><\/span><\/p>\n

int<\/span> main<\/span>(<\/span>int<\/span> argc,<\/span>char<\/span> *<\/span>argv[<\/span>]<\/span>)<\/span>
\n{<\/span>
\n \/\/\u5411\u63a7\u5236\u53f0\u8f93\u51faHello World<\/span>
\n printf<\/span>(<\/span>"Hello World\\\\n"<\/span>)<\/span>;<\/span><\/p>\n

\/\/ \u8ba1\u7b97\u5706\u7684\u9762\u79ef<\/span>
\ndouble<\/span> area =<\/span> PI *<\/span> R *<\/span> R;<\/span> \/\/ \u9884\u5904\u7406\u540e：double area = 3.1415926 * 2 * 2<\/span><\/p>\n

printf<\/span>(<\/span>"%lf\\\\n"<\/span>,<\/span> area)<\/span>;<\/span><\/p>\n

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

#\u8fd0\u884c\u7ed3\u679c<\/span>
\nyueqian@yueqian-vm:~$ .\/a.out
\nHello World
\n12.566370<\/span><\/p>\n

{}\u5bf9\u2eec<\/h6>\n

\u63a8\u8350（C\/C++\u98ce\u683c）<\/p>\n

int<\/span> fun<\/span>(<\/span>)<\/span>
\n{<\/span>
\n.<\/span>.<\/span>.<\/span>
\n}<\/span><\/p>\n

\u5206\u5c42\u7f29\u8fdb\u4e0e\u6a21\u5757\u5316<\/h6>\n

\u51fd\u6570\u4f53\u5185\u7684\u4ee3\u7801\u6309\u903b\u8f91\u5c42\u6b21\u7f29\u8fdb，\u590d\u6742\u903b\u8f91\u62c6\u5206\u6a21\u5757\u5316：<\/p>\n

int<\/span> func<\/span>(<\/span>)<\/span>
\n{<\/span>
\nif<\/span> (<\/span>.<\/span>.<\/span>)<\/span>
\n{<\/span>
\nfor<\/span> (<\/span>.<\/span>.<\/span>)<\/span>
\n{<\/span>
\n printf<\/span>(<\/span>"hello\\\\n"<\/span>)<\/span>;<\/span>
\n}<\/span>
\n}<\/span>
\nif<\/span> (<\/span>.<\/span>.<\/span>)<\/span>
\n{<\/span>
\nfor<\/span> (<\/span>.<\/span>.<\/span>)<\/span>
\n{<\/span>
\nprintf<\/span>(<\/span>"hello\\\\n"<\/span>)<\/span>;<\/span>
\n}<\/span>
\n}<\/span>
\n}<\/span><\/p>\n

\u5355\u53e5\u5355\u2f8f<\/h6>\n

\u4e0d\u5c06\u591a\u6761\u8bed\u53e5\u5199\u5728\u540c\u4e00\u884c<\/p>\n

int<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\n\/\/ \u4e0d\u63a8\u8350\u7684\u5199\u6cd5<\/span>
\nprintf<\/span>(<\/span>"\u7b2c1\u884c\\\\n"<\/span>)<\/span>;<\/span> printf<\/span>(<\/span>"\u7b2c2\u884c\\\\n"<\/span>)<\/span>;<\/span> printf<\/span>(<\/span>"\u7b2c3\u884c\\\\n"<\/span>)<\/span>;<\/span>
\n\/\/ \u63a8\u8350\u7684\u5199\u6cd5<\/span>
\nprintf<\/span>(<\/span>"\u7b2c1\u884c\\\\n"<\/span>)<\/span>;<\/span>
\nprintf<\/span>(<\/span>"\u7b2c2\u884c\\\\n"<\/span>)<\/span>;<\/span>
\nprintf<\/span>(<\/span>"\u7b2c3\u884c\\\\n"<\/span>)<\/span>;<\/span>
\n}<\/span><\/p>\n

\u6807\u8bc6\u7b26\u547d\u540d<\/h6>\n

\u51fd\u6570\u540d\u3001\u53d8\u91cf\u540d\u7b49\u90fd\u53eb\u6807\u8bc6\u7b26，\u547d\u540d\u8981\u89c1\u540d\u77e5\u610f，\u4f7f\u7528\u82f1\u6587\u5355\u8bcd\u6216\u77ed\u8bed，\u907f\u514d\u65e0\u610f\u4e49\u7684\u5b57\u6bcd<\/p>\n

int<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\n\/\/ \u4e0d\u63a8\u8350\u7684\u5199\u6cd5<\/span>
\nint<\/span> a =<\/span> 21<\/span>;<\/span>
\nint<\/span> b =<\/span> 168<\/span>;<\/span>
\nint<\/span> c =<\/span> 190<\/span>;<\/span>
\n\/\/ \u63a8\u8350\u7684\u5199\u6cd5<\/span>
\nint<\/span> age =<\/span> 21<\/span>;<\/span> \/\/ \u5e74\u9f84：21<\/span>
\nint<\/span> height =<\/span> 168<\/span>;<\/span> \/\/ \u8eab\u9ad8：168<\/span>
\nint<\/span> weight =<\/span> 190<\/span>;<\/span> \/\/ \u4f53\u91cd：190<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

C\u8bed\u2f94\u4e2d\u7684\u6ce8\u91ca<\/h4>\n

C\u8bed\u8a00\u6ce8\u91ca\u5206\u4e3a\u5355\u884c\u6ce8\u91ca\u548c\u591a\u884c\u6ce8\u91ca，\u4f5c\u7528\u662f\u89e3\u91ca\u4ee3\u7801\u3001\u5c4f\u853d\u4e34\u65f6\u65e0\u7528\u4ee3\u7801\u3001\u4e0d\u53c2\u4e0e\u7f16\u8bd1（\u5728\u9884\u5904\u7406\u9636\u6bb5\u5220\u9664）\u3002<\/p>\n

\u5355\u2f8f\u6ce8\u91ca<\/h5>\n

\u683c\u5f0f：\u7528 \/\/ \u5f00\u5934，\u6ce8\u91ca\u4ece \/\/ \u5230\u884c\u5c3e<\/p>\n

\u9002\u7528\u573a\u666f：\u53d8\u91cf\u8bf4\u660e\u3001\u5e38\u91cf\u8bf4\u660e\u3001\u51fd\u6570\u8c03\u7528\u8bed\u53e5\u3001\u7b80\u5355\u903b\u8f91\u6ce8\u91ca<\/p>\n

\/\/ \u6ce8\u91ca\u5185\u5bb9<\/span><\/p>\n

\/\/ \u9884\u5904\u7406\u6307\u4ee4：\u5f15\u5165\u7cfb\u7edf\u6807\u51c6\u8f93\u5165\u8f93\u51fa\u5e93（printf\u51fd\u6570\u9700\u8981\u7528\u5230）<\/span>
\n#<\/span>include<\/span> <stdio.h><\/span><\/span>
\nint<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\n\/\/ \u5411\u63a7\u5236\u53f0\u8f93\u51fa hello world! \\\\n\u662f\u6362\u884c\u7b26，\u5fc5\u987b\u5199\u5728 "\\\\n" \u5185\u90e8<\/span>
\nprintf<\/span>(<\/span>"hello world!\\\\n"<\/span>)<\/span>;<\/span><\/p>\n

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

\u591a\u2f8f\u6ce8\u91ca<\/h5>\n

\u683c\u5f0f：\u7528 \/* \u5f00\u5934，\u4ee5 *\/ \u7ed3\u5c3e，\u53ef\u5355\u884c，\u53ef\u8de8\u591a\u884c，\u4e0d\u80fd\u5d4c\u5957<\/p>\n

\u9002\u7528\u573a\u666f：\u6587\u4ef6\u5934\u8bf4\u660e\u3001\u51fd\u6570\u529f\u80fd\u8bf4\u660e\u3001\u590d\u6742\u4ee3\u7801\u5757\u6ce8\u91ca<\/p>\n

\/* \u6ce8\u91ca\u5185\u5bb9 *\/<\/span><\/p>\n

\/*
\n\u6ce8\u91ca\u5185\u5bb9
\n\u6ce8\u91ca\u5185\u5bb9
\n*\/<\/span><\/p>\n

\/*
\n\u51fd\u6570\u540d：main
\n\u529f\u80fd：\u7a0b\u5e8f\u5165\u53e3，\u8f93\u51fahello world!
\n\u8fd4\u56de\u503c：0-\u8868\u793a\u7a0b\u5e8f\u6b63\u5e38\u7ed3\u675f
\n*\/<\/span>
\nint<\/span> main<\/span>(<\/span>)<\/span>
\n{<\/span>
\n.<\/span>.<\/span>.<\/span>
\n}<\/span><\/p>\n

\u2f42\u6863\u6ce8\u91ca<\/h5>\n

\u6587\u6863\u6ce8\u91ca\u672c\u8d28\u4e0a\u8fd8\u662f\u591a\u884c\u6ce8\u91ca，\u7528\u4e8e\u751f\u6210\u6807\u51c6\u5316\u6587\u6863，\u683c\u5f0f\u66f4\u52a0\u89c4\u8303，\u4e00\u822c\u66ff\u4ee3\u4f20\u7edf\u7684\u591a\u884c\u6ce8\u91ca\u3002<\/p>\n

\/**
\n * @brief \u51fd\u6570\u540d：main
\n * @author \u5f00\u53d1\u8005\u59d3\u540d
\n * @date \u5f00\u53d1\u65f6\u95f4
\n * @param argc \u89e3\u91ca\u53c2\u6570
\n * @param argv \u89e3\u91ca\u53c2\u6570
\n * @return \u8fd4\u56de\u503c\u8bf4\u660e
\n *\/<\/span>
\nint<\/span> main<\/span>(<\/span>int<\/span> argc,<\/span> char<\/span>*<\/span> argv[<\/span>]<\/span>)<\/span>
\n{<\/span>
\n.<\/span>.<\/span>.<\/span><\/p>\n

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

\u6570\u636e\u7c7b\u578b<\/h4>\n

\u6570\u636e\u7c7b\u578b\u51b3\u5b9a\u4e86\u6570\u636e\u5728\u5185\u5b58\u4e2d\u5982\u4f55\u5b58\u50a8？\u9700\u8981\u591a\u5927\u7a7a\u95f4？<\/p>\n

\u6570\u636e：\u8ba1\u7b97\u673a\u9700\u8981\u5904\u7406\u7684\u4fe1\u606f（\u6570\u5b57\u3001\u6587\u5b57\u3001\u7b26\u53f7\u3001\u56fe\u7247\u3001\u97f3\u89c6\u9891\u7b49），\u7a0b\u5e8f\u8fd0\u884c\u65f6\u6240\u6709\u6570\u636e\u90fd\u9700\u8981\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\u3002<\/p>\n

\u6570\u636e\u7c7b\u578b\u5206\u7c7b<\/h5>\n
\u57fa\u672c\u7c7b\u578b（\u5185\u7f6e\u7c7b\u578b）<\/h6>\n

\u200b\u2013 \u6574\u578b（\u6570\u503c\u7c7b\u578b，\u5b58\u50a8\u6574\u6570）<\/p>\n

\u200b \u77ed\u6574\u578b： short （ short int \u7684\u8868\u793a），2\u4e2a\u5b57\u8282<\/p>\n

\u200b\u57fa\u672c\u578b： int （\u4f7f\u7528\u9891\u7387\u6700\u9ad8），4\u4e2a\u5b57\u8282<\/p>\n

\u200b\u957f\u6574\u578b： long （ long int \u7684\u8868\u793a），32\u4f4d\u7cfb\u7edf4\u5b57\u8282，64\u4f4d\u7cfb\u7edf8\u5b57\u8282<\/p>\n

\u200b\u957f\u957f\u6574\u578b： long long （ long long int ，C99\u65b0\u589e\u6807\u51c6）<\/p>\n

\u200b\u2013 \u6d6e\u70b9\u578b（\u6570\u503c\u7c7b\u578b，\u5b58\u50a8\u5c0f\u6570\/\u5b9e\u6570）<\/p>\n

\u200b\u5355\u7cbe\u5ea6\u578b： float ，4\u4e2a\u5b57\u8282<\/p>\n

\u200b\u53cc\u7cbe\u5ea6\u578b： double ，8\u4e2a\u5b57\u8282<\/p>\n

\u200b\u957f\u53cc\u7cbe\u5ea6\u578b： long double<\/p>\n

\u200b\u2013 \u5b57\u7b26\u578b： char （\u5b58\u50a8\u5355\u4e2a\u5b57\u7b26，\u672c\u8d28\u662fASCII\u7801\u503c），1\u4e2a\u5b57\u8282<\/p>\n

\u6784\u9020\u7c7b\u578b（\u7528\u6237\u57fa\u4e8eC\u8bed\u8a00\u8bed\u6cd5\u5b9a\u4e49）<\/h6>\n
\u6307\u9488\u7c7b\u578b（\u5b58\u50a8\u5185\u5b58\u5730\u5740）<\/h6>\n
\u7a7a\u7c7b\u578b<\/h6>\n

void （\u8868\u793a\u65e0\u7c7b\u578b，\u7528\u4e8e\u51fd\u6570\u8fd4\u56de\u503c，\u51fd\u6570\u5f62\u53c2，\u6307\u9488\u7c7b\u578b），\u4e3e\u4f8b： main(void) \u7b49\u4ef7\u4e8e main()<\/p>\n

\u6570\u636e\u7c7b\u578b\u5728\u5185\u5b58\u4e2d\u7684\u5927\u5c0f<\/h5>\n\n\u6570\u636e\u7c7b\u578b\u4e2d\u6587\u8bf4\u660e\u5927\u5c0f（\u5b57\u8282）\u5e38\u89c1\u53d6\u503c\u8303\u56f4<\/tr>\n\n\n\n\n\n\n\n\n\n
short<\/td>\n\u77ed\u6574\u578b<\/td>\n2<\/td>\n-32768~32767<\/td>\n<\/tr>\n
int<\/td>\n\u57fa\u672c\u6574\u578b<\/td>\n4<\/td>\n-2147483648 ~ 2147483647<\/td>\n<\/tr>\n
long<\/td>\n\u957f\u6574\u578b<\/td>\n4（32\u4f4d\u7cfb\u7edf）\/8（64\u4f4d\u7cfb\u7edf）<\/td>\n32\u4f4d：\u540cint；Linux 64\u4f4d：-9223372036854775808 ~9223372036854775807；Windows 64\u4f4d：\u540c32\u4f4d（-2147483648 ~ 2147483647）<\/td>\n<\/tr>\n
long long<\/td>\n\u957f\u957f\u6574\u578b<\/td>\n8<\/td>\n-9223372036854775808 ~ 9223372036854775807<\/td>\n<\/tr>\n
float<\/td>\n\u5355\u7cbe\u5ea6\u6d6e\u70b9\u578b<\/td>\n4<\/td>\n\u7ea6 \u00b13.4\u00d710\u00b3\u2078（\u7cbe\u5ea6 6~7 \u4f4d\u6709\u6548\u6570\u5b57）<\/td>\n<\/tr>\n
double<\/td>\n\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u578b<\/td>\n8<\/td>\n\u7ea6 \u00b11.7\u00d710\u00b3\u2070\u2078（\u7cbe\u5ea6 15~16 \u4f4d\u6709\u6548\u6570\u5b57）<\/td>\n<\/tr>\n
char<\/td>\n\u5b57\u7b26\u578b<\/td>\n1<\/td>\n-128 ~ 127（\u6709\u7b26\u53f7）\/ 0 ~ 255（\u65e0\u7b26\u53f7）<\/td>\n<\/tr>\n
bool(_Bool,C99\u65b0\u589e)<\/td>\n\u5e03\u5c14\u578b<\/td>\n1<\/td>\ntrue（\u975e 0）\u3001false（0）<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u6ce8\u610f： \u8ba1\u7b97\u673a\u5b58\u50a8\u6700\u5c0f\u5355\u4f4d\u662f bit （\u4f4d），1\u4e2a bit \u4ec5\u80fd\u5b58\u50a80\u62161；\u7a0b\u5e8f\u4e2d\u6700\u5c0f\u64cd\u4f5c\u5355\u4f4d\u662f Byte （\u5b57<\/p>\n

\u8282），1\u5b57\u8282 = 8\u4f4d；C\u8bed\u8a00\u4e2d\u6ca1\u6709 Byte \u8fd9\u4e2a\u5355\u4f4d，\u6211\u4eec\u4f7f\u7528 char \u8868\u793a\u5b57\u8282\u3002\u4e5f\u5c31\u662f 1 char =<\/p>\n

8 bit \u3002<\/p>\n

sizeof\u8fd0\u7b97\u7b26\u4f7f\u7528\u793a\u4f8b<\/h5>\n

sizeof\u8fd0\u7b97\u7b26，\u7528\u6765\u8ba1\u7b97\u6570\u636e\u7c7b\u578b\u6216\u8005\u53d8\u91cf\u7684\u5927\u5c0f，\u8fd4\u56de\u7684\u662f\u5b57\u8282\u6570<\/p>\n

\/*************************************************************************
\n> File Name: demo01.c
\n> Author: \u848b\u6587\u8f89
\n> Description:
\n> Created Time: 2026\u5e7407\u670829\u65e5 \u661f\u671f\u4e09 17\u65f625\u520631\u79d2
\n************************************************************************\/<\/span><\/p>\n

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

int<\/span> main<\/span>(<\/span>int<\/span> argc,<\/span>char<\/span> *<\/span>argv[<\/span>]<\/span>)<\/span>
\n{<\/span>
\nprintf<\/span>(<\/span>"int\u7684\u5927\u5c0f=%ld\u5b57\u8282\\\\n"<\/span>,<\/span> sizeof<\/span>(<\/span>int<\/span>)<\/span>)<\/span>;<\/span>
\nprintf<\/span>(<\/span>"double\u7684\u5927\u5c0f=%ld\u5b57\u8282\\\\n"<\/span>,<\/span> sizeof<\/span>(<\/span>double<\/span>)<\/span>)<\/span>;<\/span><\/p>\n

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

#\u8fd0\u884c\u7ed3\u679c<\/span>
\nint\u7684\u5927\u5c0f=<\/span>4<\/span>\u5b57\u8282
\ndouble\u7684\u5927\u5c0f=<\/span>8<\/span>\u5b57\u8282<\/p>\n

\u603b\u7ed3：<\/p>\n

\u2460 \u6570\u636e\u7c7b\u578b\u7684\u5b57\u8282\u5927\u5c0f\u4e0eC\u8bed\u8a00\u7f16\u8bd1\u7cfb\u7edf（32\u4f4d\/64\u4f4d）\u3001\u64cd\u4f5c\u7cfb\u7edf\u76f8\u5173；<\/p>\n

\u2461 sizeof \u662f\u8fd0\u7b97\u7b26（\u975e\u51fd\u6570），\u8ba1\u7b97\u7ed3\u679c\u4e3a\u65e0\u7b26\u53f7\u6574\u6570（\u53ea\u6709\u6b63\u6574\u6570，\u6ca1\u6709\u8d1f\u6574\u6570）；<\/p>\n

\u5e38\u91cf<\/h4>\n

\u5e38\u91cf\u662f\u7a0b\u5e8f\u6267\u884c\u8fc7\u7a0b\u4e2d\u503c\u4e0d\u53ef\u6539\u53d8\u7684\u91cf，\u4e0e\u53d8\u91cf\u4e00\u6837\u9700\u8981\u7528\u5230\u5185\u5b58\u7a7a\u95f4\u5b58\u50a8\u3002<\/p>\n

\u6574\u578b\u5e38\u91cf<\/h5>\n

\u6574\u578b\u5e38\u91cf\u6709\u5341\u8fdb\u5236\u3001\u516b\u8fdb\u5236\u3001\u5341\u516d\u8fdb\u5236\u4e09\u79cd\u8868\u793a\u5f62\u5f0f；<\/p>\n

\u8868\u793a\u5f62\u5f0f<\/h6>\n
\u5341\u8fdb\u5236\u5e38\u91cf<\/h6>\n

\u200b\u2013 \u7ec4\u6210：\u6570\u5b57 0~9 ，\u4e0d\u80fd\u4ee5 0 \u5f00\u5934， 0 \u81ea\u8eab\u9664\u5916<\/p>\n

\u200b\u2013 \u6ce8\u610f：\u4e0d\u80fd\u8868\u793a\u5c0f\u6570<\/p>\n

\u200b\u2013 \u793a\u4f8b：\u6b63\u786e\u5199\u6cd5： 99 ， 298， 0<\/p>\n

\u200b \u9519\u8bef\u5199\u6cd5： 06 ， 000<\/p>\n

\u516b\u8fdb\u5236\u5e38\u91cf<\/h6>\n

\u200b\u2013 \u7ec4\u6210：\u6570\u5b57 0~7 ，\u4ee50\u4e3a\u524d\u7f00（\u4e0d\u53ef\u7701\u7565）<\/p>\n

\u200b\u2013 \u6ce8\u610f：\u4e0d\u80fd\u8868\u793a\u5c0f\u6570<\/p>\n

\u200b\u2013 \u793a\u4f8b：\u6b63\u786e\u5199\u6cd5： 03 ， 062 ， 000<\/p>\n

\u200b \u9519\u8bef\u5199\u6cd5： 039 , 255<\/p>\n

\u5341\u516d\u8fdb\u5236\u5e38\u91cf<\/h6>\n

\u200b\u2013 \u7ec4\u6210： 0~9 + a~f \/ A~F ，\u4ee5 0x\/0X \u4e3a\u524d\u7f00<\/p>\n

\u200b\u2013 \u6ce8\u610f：\u4e0d\u80fd\u8868\u793a\u5c0f\u6570<\/p>\n

\u200b\u2013 \u793a\u4f8b： 0xFFAEFBF \u3001 0X123 \u3001 0x0 \/0x00000000<\/p>\n

\u540e\u7f00\u8bf4\u660e<\/h6>\n

\u957f\u6574\u578b\u5e38\u91cf：\u5728\u6570\u503c\u540e\u52a0 L\/l ，\u63a8\u8350\u7528 L<\/p>\n

\u793a\u4f8b： long num = 123L \u660e\u786e\u6307\u5b9a\u4e3a\u957f\u6574\u578b，\u6b64\u65f6\u7684 L \u53ea\u8d77\u5230\u4e00\u4e2a\u6807\u8bc6\u4f5c\u7528，\u6570\u503c\u4f9d\u7136\u662f 123<\/p>\n

\u6709\u7b26\u53f7\u548c\u65e0\u7b26\u53f7<\/h6>\n

\u6709\u7b26\u53f7（\u9ed8\u8ba4）：\u8868\u793a\u8303\u56f4\u4e3a \u8d1f\u6570 + 0 + \u6b63\u6570 ，\u5982 char \u7684\u6709\u6548\u8303\u56f4\u662f -128~127 ，\u53ef\u4ee5\u5728\u7c7b\u578b\u524d\u6dfb\u52a0\u4fee\u9970\u5173<\/p>\n

\u952e\u5b57 signed ，\u4e00\u822c\u7701\u7565\u3002<\/p>\n

\/\/ \u4ee5\u4e0b\u4e24\u884c\u4ee3\u7801\u5b8c\u5168\u7b49\u4ef7<\/span>
\nsigned<\/span> int<\/span> a =<\/span> 10086<\/span>;<\/span>
\nint<\/span> a =<\/span> 10086<\/span>;<\/span><\/p>\n

\u65e0\u7b26\u53f7：\u8868\u793a\u8303\u56f4 0 + \u6b63\u6570 （\u5185\u5b58\u4e2d\u8d1f\u6570\u4f4d\u7528\u6765\u5b58\u50a8\u6b63\u6570，\u6b63\u6570\u8303\u56f4\u66f4\u5927），\u5982 char \u7684\u65e0\u7b26\u53f7\u8303\u56f4\u662f<\/p>\n

0~255 ，\u9700\u8981\u518d\u7c7b\u578b\u524d\u6dfb\u52a0\u4fee\u9970\u5173\u952e\u5b57 unsigned \u3002<\/p>\n

unsigned<\/span> char<\/span> num =<\/span> 100<\/span>;<\/span> \/\/ \u53ea\u80fd\u5b58\u50a8 0 ~ 255<\/span><\/p>\n

char(\u6709\u7b26\u53f7)\u8303\u56f4：-128~127<\/p>\n

char(\u65e0\u7b26\u53f7)\u8303\u56f4：0~255<\/p>\n

\u6d6e\u70b9\u578b\u5e38\u91cf<\/h5>\n

\u6d6e\u70b9\u578b\u5e38\u91cf（\u5c0f\u6570\/\u5b9e\u6570）\u6709\u4e24\u79cd\u8868\u793a\u65b9\u5f0f：<\/p>\n

\u5341\u8fdb\u5236\u5c0f\u6570\u5f62\u5f0f<\/h6>\n

\u7ec4\u6210：\u6570\u5b57 0~9 ，\u5c0f\u6570\u70b9 . ，\u5fc5\u987b\u5305\u542b\u5c0f\u6570\u70b9（\u5373\u4f7f\u6574\u6570\u90e8\u5206\u4e3a0\u6216\u5c0f\u6570\u90e8\u5206\u4e3a0）<\/p>\n

\u793a\u4f8b： 0.123 (double，\u9ed8\u8ba4) \/ 0.123F (float)\u3001 -12.6 \u3001 3.0 \u3001 0.0<\/p>\n

\u6ce8\u610f：<\/p>\n

\u200b\u2013 float \u7c7b\u578b\u5e38\u91cf\u9700\u8981\u5728\u672b\u5c3e\u6dfb\u52a0 F\/f ，\u9ed8\u8ba4\u6d6e\u70b9\u578b\u5e38\u91cf\u4e3a double \u7c7b\u578b\u3002<\/p>\n

\u200b\u2013 \u793a\u4f8b： float f = 0.12F （\u660e\u786e\u6307\u5b9a\u4e3a\u5355\u7cbe\u5ea6\u6d6e\u70b9\u578b）<\/p>\n

\u6307\u6570\u5f62\u5f0f（\u79d1\u5b66\u8ba1\u6570\u6cd5）<\/h6>\n

\u683c\u5f0f： \u6570\u5b57 e\/E\u6574\u6570\u6307\u6570 ， e\/E \u8868\u793a10\u7684\u5e42\u6b21\u3002<\/p>\n

\u793a\u4f8b：<\/p>\n

\u200b\u2013 \u6b63\u6570： 12345.67\u21921.234567*10^4\u21921.23467e+4\u62161.234567e4（\u5341\u8fdb\u5236\u5c0f\u6570\u5f62\u5f0f \u2192 \u6307\u6570\u5f62\u5f0f）<\/p>\n

\u2013 \u8d1f\u6570： 0.0147\u21921.47*10^2\u21921.47e-2（\u5341\u8fdb\u5236\u5c0f\u6570\u5f62\u5f0f \u2192 \u6307\u6570\u5f62\u5f0f）<\/p>\n

\u6ce8\u610f：<\/p>\n

\u200b\u2013 e\/E \u524d\u9762\u5fc5\u987b\u6709\u6570\u5b57（ 0~9 ），\u5176\u4e2d\u5c0f\u6570\u70b9\u524d\u7684\u6574\u6570\u90e8\u5206\u53d6\u503c\u8303\u56f4\u4e3a 1~9 （\u524d\u5bfc\u96f6 0 \u5728\u6570\u503c\u4e0a\u65e0\u610f\u4e49，\u4f46C\u8bed\u6cd5\u5141\u8bb8）<\/p>\n

\u200b\u2013 e\/E \u540e\u9762\u5fc5\u987b\u662f\u6574\u6570（\u4e0d\u80fd\u5e26\u5c0f\u6570），\u9519\u8bef\u793a\u4f8b： 1.2345e3.5<\/p>\n

\u200b\u2013 \u5355\u7cbe\u5ea6\u5e38\u91cf\u9700\u8981\u52a0 f\/F ，\u5982 1.2345e3F (float)\u3001 1.2345e3 (double，\u9ed8\u8ba4)<\/p>\n

\u5b57\u7b26\u578b\u5e38\u91cf<\/h5>\n
\u666e\u901a\u5b57\u7b26\u5e38\u91cf<\/h6>\n

\u683c\u5f0f：\u7528\u5355\u5f15\u53f7 \u2018\u2019 \u62ec\u8d77\u6765\u7684\u5355\u4e2a\u5b57\u7b26\u3002\u82f1\u6587\u8f93\u5165\u6cd5\u4e0b\u7684\u5b57\u6bcd\u3001\u6570\u5b57\u3001\u7b26\u53f7\u7b49ASCII\u89c4\u8303\u7684\u5b57\u7b26\u3002<\/p>\n

\u793a\u4f8b：<\/p>\n

\u200b\u2013 \u6b63\u786e\u793a\u4f8b：\u5982 \u2018a\u2019 , \u2018A\u2019 , \u20185\u2019 , \u2018_\u2019 , \u2018+\u2019 , \u2018\\\\n\u2019<\/p>\n

\u200b\u2013 \u9519\u8bef\u793a\u4f8b：\u5982 \u2018\u8f6f\u2019 , \u201ca\u201d<\/p>\n

\u672c\u8d28：\u786c\u4ef6\u5b58\u50a8\u7684\u662fASCII\u89c4\u8303\u7684\u5b57\u7b26\u7684ASCII\u7801\u503c，\u5982 a \u7684ASCII\u7801\u503c\u4e3a 97 ， A \u7684ASCII\u7801\u503c\u4e3a 65 ,\u6570\u5b57\u4e3a48<\/p>\n

\u8f6c\u4e49\u5b57\u7b26\u5e38\u91cf<\/h6>\n

\u4ee5\u53cd\u659c\u6760 \\\\ \u5f00\u5934\u7684\u7279\u6b8a\u7684\u5b57\u7b26\u5e8f\u5217，\u7528\u4e8e\u8868\u793a\u63a7\u5236\u5b57\u7b26\u6216\u4e0d\u53ef\u89c1\u5b57\u7b26（\u5982\u6362\u884c\u7b26\u3001\u5236\u8868\u7b26），\u5e38\u89c1\u8f6c\u4e49\u7b26\u5982\u4e0b：<\/p>\n\n\u5b57\u7b26\u5f62\u5f0fASCII\u7801\u4e2d\u6587\u89e3\u91ca\u7528\u9014<\/tr>\n\n\n\n\n\n\n\n\n
'\\\\n'<\/td>\n10<\/td>\n\u6362\u884c<\/td>\n\u5149\u6807\u79fb\u52a8\u81f3\u4e0b\u4e00\u884c\u5f00\u5934<\/td>\n<\/tr>\n
'\\\\r'<\/td>\n13<\/td>\n\u56de\u8f66<\/td>\n\u5149\u6807\u79fb\u52a8\u81f3\u5f53\u524d\u884c\u5f00\u5934<\/td>\n<\/tr>\n
'\\\\0'<\/td>\n0<\/td>\n\u7a7a\u5b57\u7b26<\/td>\n\u5b57\u7b26\u4e32\u7ed3\u675f\u6807\u5fd7（\u91cd\u8981）<\/td>\n<\/tr>\n
'\\\\t'<\/td>\n9<\/td>\n\u6c34\u5e73\u5236\u8868\u7b26<\/td>\n\u76f8\u5f53\u4e8e\u6309Tab\u952e（8\u4e2a\u7a7a\u683c）<\/td>\n<\/tr>\n
'\\\\\\\\'<\/td>\n92<\/td>\n\u53cd\u659c\u6760<\/td>\n\u8868\u793a\u5b57\u7b26 \\\\<\/td>\n<\/tr>\n
'\\\\''<\/td>\n39<\/td>\n\u5355\u5f15\u53f7<\/td>\n\u8868\u793a\u5b57\u7b26 '<\/td>\n<\/tr>\n
'\\\\"'<\/td>\n34<\/td>\n\u53cc\u5f15\u53f7<\/td>\n\u8868\u793a\u5b57\u7b26 "<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u5728 Linux \u7ec8\u7aef\u8f93\u5165 man ascii \u53ef\u67e5\u770b\u6240\u6709 ASCII \u5b57\u7b26\u53ca\u5bf9\u5e94\u7801\u503c\u3002<\/p>\n

\u5b57\u7b26\u4e32\u5e38\u91cf<\/h5>\n
\u5b9a\u4e49<\/h5>\n

\u7528\u53cc\u5f15\u53f7""\u62ec\u8d77\u6765\u7684\u5b57\u7b26\u5e8f\u5217（\u53ef\u5305\u542b\u591a\u4e2a\u5b57\u7b26\u3001\u6570\u5b57\u3001\u7b26\u53f7）,C\u8bed\u8a00\u65e0\u5185\u7f6e\u7684\u5b57\u7b26\u4e32\u7c7b\u578b，\u5b57\u7b26\u4e32\u5e38\u91cf\u548c\u53d8\u91cf\u5747\u9700\u8981\u901a\u8fc7\u5b57\u7b26\u6570\u7ec4\u6216\u8005\u5b57\u7b26\u6307\u9488\u6765\u5b9e\u73b0\u3002\u5b57\u7b26\u4e32\u5e38\u91cf\u672b\u5c3e\u81ea\u52a8\u6dfb\u52a0\\\\0 \u7ed3\u675f\u6807\u8bb0，\u4f46\u662f\u8fd9\u4e2a\u6807\u5fd7\u662f\u770b\u4e0d\u89c1\u7684，\u4e5f\u4e0d\u4f1a\u663e\u793a\u8f93\u51fa\u3002<\/p>\n

\u793a\u4f8b<\/h5>\n

"How are you ? "<\/span> \/\/ \u5b9e\u9645\u5b58\u50a8：How are you ? \\\\0<\/span>
\n"hello world"<\/span> \/\/ \u5b9e\u9645\u5b58\u50a8：hello world\\\\0<\/span>
\n"123456"<\/span> \/\/ \u5b9e\u9645\u5b58\u50a8：123456\\\\0<\/span>
\n""<\/span> \/\/ \u5b9e\u9645\u5b58\u50a8：\\\\0<\/span><\/p>\n

\u8f93\u51fa<\/h5>\n

\u901a\u8fc7printf\u51fd\u6570\u7684%s\u683c\u5f0f\u8f93\u51fa：<\/p>\n

printf<\/span>(<\/span>"hello world!\\\\n"<\/span>)<\/span>;<\/span> \/\/ \u63a8\u8350，\u5185\u90e8\u8865\u5145%s<\/span>
\n\/\/ \u7b49\u4ef7\u4e8e<\/span>
\nprintf<\/span>(<\/span>"%s"<\/span>,<\/span> "hello world!\\\\n"<\/span>)<\/span>;<\/span><\/p>\n

\u4e0e\u5b57\u7b26\u5e38\u91cf\u7684\u533a\u522b<\/h5>\n\n\u5bf9\u6bd4\u9879\u5b57\u7b26\u5e38\u91cf（\u5982：\u2018a\u2019）\u5b57\u7b26\u4e32\u5e38\u91cf（\u5982：\u201ca\u201d）<\/tr>\n\n\n\n\n\n
\u5b9a\u754c\u7b26<\/td>\n\u5355\u5f15\u53f7 ''<\/td>\n\u53cc\u5f15\u53f7 ""<\/td>\n<\/tr>\n
\u5185\u5b58\u5360\u7528<\/td>\n1\u5b57\u8282（\u5b58\u50a8ASCII\u7801）<\/td>\n2\u5b57\u8282（'a' + '\\\\0'）<\/td>\n<\/tr>\n
\u7ed3\u675f\u6807\u5fd7<\/td>\n\u65e0<\/td>\n\u81ea\u52a8\u6dfb\u52a0 \\\\0，\u5b57\u7b26\u4e32\u7ed3\u675f\u6807\u5fd7<\/td>\n<\/tr>\n
\u8868\u793a\u8303\u56f4<\/td>\n\u4ec5\u5355\u4e2a\u5b57\u7b26<\/td>\n\u53ef\u591a\u4e2a\u5b57\u7b26\u6216\u7a7a<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u5173\u952e：\u5b57\u7b26\u4e32\u5e38\u91cf\u672b\u5c3e\u4f1a\u88ab\u7cfb\u7edf\u81ea\u52a8\u6dfb\u52a0 \\\\0，\u7528\u4e8e\u6807\u8bc6\u5b57\u7b26\u4e32\u7ed3\u675f，\u8fd9\u662f\u5b57\u7b26\u4e32\u4e0e\u5b57\u7b26\u5e38\u91cf\u7684\u6838\u5fc3\u533a\u522b\u3002<\/p>\n

\u7b26\u53f7\u5e38\u91cf（\u65e0\u53c2\u5b8f\u5b9a\u4e49）<\/h4>\n

\u5b9a\u4e49<\/h5>\n

\u901a\u8fc7\u9884\u5904\u7406\u6307\u4ee4#define\u5b9a\u4e49\u7684\u6807\u8bc6\u7b26，\u7528\u4e8e\u4ee3\u8868\u4e00\u4e2a\u56fa\u5b9a\u5e38\u91cf（\u9884\u5904\u7406\u9636\u6bb5，\u4f1a\u76f4\u63a5\u66ff\u6362\u6210\u5b8f\u503c）<\/p>\n

\u4f18\u70b9<\/h5>\n

\u589e\u5f3a\u4ee3\u7801\u7684\u53ef\u8bfb\u6027（\u7528\u6709\u610f\u4e49\u7684\u6807\u8bc6\u7b26\u4ee3\u66ff\u9b54\u6cd5\u6570\u5b57）<\/p>\n

\u63d0\u5347\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027（\u9700\u4fee\u6539\u5e38\u91cf\u65f6，\u4ec5\u9700\u8981\u4fee\u6539\u5b8f\u5b9a\u4e49，\u65e0\u9700\u9010\u4e2a\u4fee\u6539\u4ee3\u7801）<\/p>\n

\u8bed\u6cd5\u683c\u5f0f<\/h5>\n

#<\/span>define<\/span> \u5b8f\u540d\u79f0 \u5b8f\u503c<\/span><\/span><\/p>\n

\u6ce8\u610f\u4e8b\u9879<\/h5>\n

\u2460 \u5b8f\u540d\u79f0\u4e0e\u5b8f\u503c\u4e4b\u95f4\u7528\u7a7a\u683c\u9694\u5f00；<\/p>\n

\u2461 \u884c\u672b\u4e0d\u80fd\u52a0;（\u5426\u5219\u66ff\u6362\u662f\u4f1a\u5e26\u5165\u5206\u53f7，\u5bfc\u81f4\u8bed\u6cd5\u9519\u8bef）<\/p>\n

\u2462 \u5b8f\u540d\u79f0\u547d\u540d\u89c4\u8303：\u5b57\u6bcd（A~Za~z）+ \u6570\u5b57（0~9）+ \u4e0b\u5212\u7ebf（_），\u4e0d\u80fd\u4ee5\u6570\u5b57\u5f00\u5934\u3002\u4e60\u60ef\u4e0a\u5b8f\u540d\u4f7f\u7528\u5168\u5927\u5199（\u5982MAX_VALUE），\u5c0f\u5199\u5b57\u6bcd\u4e5f\u5408\u6cd5\u4f46\u8f83\u5c11\u7528\u4e8e\u5b8f（\u5982max_value）<\/p>\n

\u793a\u4f8b\u4ee3\u7801<\/h5>\n

\u6e90\u7a0b\u5e8f：<\/p>\n

\/*************************************************************************
\n > File Name: demo03.c
\n > Author: \u848b\u6587\u8f89
\n > Description:
\n > Created Time: 2026\u5e7407\u670829\u65e5 \u661f\u671f\u4e09 19\u65f601\u520630\u79d2
\n ************************************************************************\/<\/span><\/p>\n

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

\/\/ \u5b9a\u4e49PI<\/span>
\n\/\/ \u8bed\u6cd5：#define \u5168\u5927\u5199\u5b8f\u540d \u5b8f\u503c<\/span>
\n#<\/span>define<\/span> PI<\/span> 3.1415926<\/span><\/span><\/span><\/p>\n

int<\/span> main<\/span>(<\/span>int<\/span> argc,<\/span>char<\/span> *<\/span>argv[<\/span>]<\/span>)<\/span>
\n{<\/span>
\n \/\/ \u5b9e\u73b0\u4e00\u4e2a\u5706\u7684\u9762\u79ef\u8ba1\u7b97<\/span>
\n \/\/ \u521b\u5efa\u4e00\u4e2a\u53d8\u91cf，\u7528\u6765\u5b58\u653e\u5706\u7684\u534a\u5f84<\/span>
\n double<\/span> r =<\/span> 10<\/span>;<\/span>
\n \/\/ \u8ba1\u7b97\u5706\u7684\u9762\u79ef<\/span>
\n double<\/span> area =<\/span> PI *<\/span> r *<\/span> r;<\/span><\/p>\n

printf<\/span>(<\/span>"\u5706\u7684\u9762\u79ef\u662f：%f\\\\n"<\/span>,<\/span> area)<\/span>;<\/span><\/p>\n

\/\/ \u8ba1\u7b97\u5706\u7684\u5468\u957f<\/span>
\n double<\/span> c =<\/span> 2<\/span> *<\/span> PI *<\/span> r;<\/span>
\n printf<\/span>(<\/span>"\u5706\u7684\u5468\u957f\u662f：%f\\\\n"<\/span>,<\/span> c)<\/span>;<\/span><\/p>\n

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

\u9884\u5904\u7406\u540e：<\/p>\n

.<\/span>.<\/span>.<\/span>
\n# 14<\/span> "demo03.c"<\/span>
\nint<\/span> main<\/span>(<\/span>int<\/span> argc,<\/span>char<\/span> *<\/span>argv[<\/span>]<\/span>)<\/span>
\n{<\/span><\/p>\n

double<\/span> r =<\/span> 10<\/span>;<\/span><\/p>\n

double<\/span> area =<\/span> 3.1415926<\/span> *<\/span> r *<\/span> r;<\/span><\/p>\n

printf<\/span>(<\/span>"\u5706\u7684\u9762\u79ef\u662f：%f\\\\n"<\/span>,<\/span> area)<\/span>;<\/span><\/p>\n

double<\/span> c =<\/span> 2<\/span> *<\/span> 3.1415926<\/span> *<\/span> r;<\/span>
\n printf<\/span>(<\/span>"\u5706\u7684\u5468\u957f\u662f：%f\\\\n"<\/span>,<\/span> c)<\/span>;<\/span><\/p>\n

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

\u8fd0\u884c\u7ed3\u679c：<\/p>\n

yueqian@st-vm:\/mnt\/hgfs\/Code\/20260729$ gcc demo03.c
\nyueqian@st-vm:\/mnt\/hgfs\/Code\/20260729$ .\/a.out
\n\u5706\u7684\u9762\u79ef\u662f：314.159260
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