gets();\u00a0 \u00a0\/\/gets\u5728\u63a5\u6536\u5b57\u7b26\u4e32\u7684\u65f6\u5019\u53ef\u4ee5\u63a5\u53d7 \u7a7a\u683c，\u9047\u5230\\\\n，\u8868\u793a\u8f93\u5165\u7ed3\u679c<\/p>\n
- \n
- \n
\u83b7\u5f97\u5b57\u7b26\u4e32\u957f\u5ea6（strlen）<\/h4>\n<\/li>\n<\/ul>\n
（string length）\u6c42\u5f97\u6709\u6548\u5b57\u7b26\u4e32\u7684\u957f\u5ea6<\/p>\n
char str[50]="hello";\u00a0 \u00a0\/\/\u5b57\u7b26\u4e32\u957f\u5ea6\u4e3a5，\u4ece\u7b2c\u4e00\u4e2a\u5b57\u7b26\u5f00\u59cb\u8ba1\u6570，\u5230\u5b57\u7b26\u4e32\u7684\\\\0（\u7ed3\u675f\u6807\u5fd7）\u4ee5\u524d\u7684\u957f\u5ea6\u4e3a\u5b57\u7b26\u4e32\u957f\u5ea6\u3002<\/p>\n
\u6ce8\u610f\u533a\u522b<\/span>：sizeof（str）\u662f\u5185\u5b58\u5360\u591a\u5927，sizeof（\u57fa\u7c7b\u578b）*\u5143\u7d20\u4e2a\u6570\u00a0 \u00a0 ：\u00a0 1*50 = 50 byte<\/p>\n<\/p>\n
\u6bd4\u5982\u8bf4<\/span>：\u201chello\u201d\u8fd9\u4e2a\u5b57\u7b26\u4e32\u5360\u7684\u5185\u5b58\u5927\u5c0f<\/span>（sizeof<\/span>）\u662f6，\u56e0\u4e3a\u540e\u9762\u8fd8\u6709\u4e00\u4e2a'\\\\0'，\u5b83\u7684\u6709\u6548\u5b57\u7b26\u4e32\u957f\u5ea6（strlen）\u662f5<\/p>\n
\u7cfb\u7edf\u8c03\u7528\u51fd\u6570<\/h5>\n
strlen（str）<\/p>\n
\u4e0d\u7528\u7cfb\u7edf\u51fd\u6570<\/h5>\n
#include <stdio.h>
\n#include <string.h>
\nint main()
\n{
\nchar str[50]="hello";
\nprintf("input 49 char:");
\nscanf("%s",str);
\nint len =0;<\/p>\nint i=0;
\nwhile(1)
\n{
\nif('\\\\0' !=str[i])
\n{
\nlen++;
\n}
\nelse
\n{
\nbreak;
\n}
\ni++;
\n}<\/p>\nprintf("sizeof() is %lu\\\\n",sizeof(str)); \/\/\u8fd9\u4e2a\u83b7\u5f97\u7684\u5927\u5c0f\u662f \u6570\u7ec4\u5360\u7528\u7684\u5185\u5b58\u5927\u5c0f
\nprintf("strlen %d\\\\n",len); \/\/\u8fd9\u4e2a\u83b7\u5f97\u7684\u662f\u5b57\u7b26\u4e32\u6709\u6548\u957f\u5ea6<\/p>\nreturn 0;
\n} <\/p>\n- \n
- \n
\u5b57\u7b26\u4e32\u590d\u5236\u64cd\u4f5c（strcpy）<\/h4>\n<\/li>\n<\/ul>\n
\u6574\u4f53\u590d\u5236\u4e00\u4e2a\u5df2\u6709\u5185\u5bb9\u7684\u5b57\u7b26\u4e32（\u6e90\u4e32），\u5230\u53e6\u5916\u4e00\u4e2a\u5b57\u7b26\u4e32（\u76ee\u6807\u4e32）\u3002\u6e90\u5b57\u7b26\u4e32\u7684\u5185\u5bb9\u548c\u76ee\u6807\u5b57\u7b26\u4e32\u7684\u5185\u5bb9\u76f8\u540c\u3002<\/p>\n
strcpy(mubiao_str,yuan_str);<\/p>\n
\u7cfb\u7edf\u8c03\u7528\u51fd\u6570<\/h5>\n
#include <stdio.h>
\n#include <string.h>
\nint main()
\n{
\nchar yuan_str[100]="hello";
\nchar mubiao_str[100]={0};<\/p>\nstrcpy(mubiao_str,yuan_str);<\/p>\n
printf("yuan_str:%s\\\\n",yuan_str);
\nprintf("mubiao_str:%s\\\\n",mubiao_str);
\nreturn 0;
\n}<\/p>\n\u4e0d\u7528\u51fd\u6570\u7684\u5b57\u7b26\u4e32\u590d\u5236<\/h5>\n
\u4ece\u6e90\u5b57\u7b26\u4e32\u4e2d\u53d6\u4e00\u4e2a\u5b57\u7b26，\u5411\u76ee\u6807\u5b57\u7b26\u4e32\u5199\u5165\u4e00\u4e2a\u5b57\u7b26，\u4f9d\u6b21\u6267\u884c\u8fd9\u4e2a\u52a8\u4f5c\u3002\u5f53\u5b57\u7b26\u4e3a\\\\0\u65f6，\u7ed3\u675f\u5faa\u73af\u3002\u5728\u76ee\u6807\u5b57\u7b26\u4e32\u7684\u6700\u540e，\u52a0\u5165\u7ed3\u675f\u6807\u5fd7\u662f\\\\0\u3002<\/p>\n
\u65b9\u6cd5\u4e00<\/h6>\n
int len =strlen(yuan_str);<\/p>\n
for(i=0;i<len;i++)
\n{
\nmubiao_str[i]=yuan_str[i];
\n}
\nmubiao_str[i]='\\\\0';<\/p>\n\u65b9\u6cd5\u4e8c<\/h6>\n
while('\\\\0' !=yuan_str[i])
\n{
\nmubiao_str[i] =yuan_str[i];
\ni++;
\n}
\nmubiao_str[i]='\\\\0';<\/p>\n\u65b9\u6cd5\u4e09<\/h6>\n
while(mubiao_str[i] = yuan_str[i])
\n{
\ni++;
\n}<\/p>\n- \n
- \n
\u5b57\u7b26\u4e32\u7684\u62fc\u63a5\u51fd\u6570（strcat）<\/h4>\n<\/li>\n<\/ul>\n
string concat<\/p>\n
strcat（str2，str1）\u628astr2\u62fc\u63a5\u5230str1<\/p>\n
\u5728\u5b57\u7b26\u4e32\u62fc\u63a5\u8fc7\u7a0b\u4e2d，str1\u9700\u8981\u6709\u8db3\u591f\u5927\u7684\u5185\u5b58\u7a7a\u95f4，\u5426\u5219\u7a0b\u5e8f\u4f1a\u51fa\u73b0\u6bb5\u9519\u8bef\u3001str1\u3001str3\u5185\u5b58\u7a7a\u95f4\u4f1a\u88ab\u610f\u5916\u4fee\u6539\u3002<\/p>\n
\u7cfb\u7edf\u8c03\u7528\u51fd\u6570<\/h5>\n
strcat（\u88ab\u62fc\u63a5，\u62fc\u63a5）；<\/p>\n
#include <stdio.h>
\n#include <string.h>
\nint main()
\n{
\nchar str1[100]="hello";
\nchar str2[10]="world";<\/p>\nstrcat(str1,str2);
\nprintf("%s\\\\n",str1);
\nreturn 0;
\n}<\/p>\n\u4e0d\u7528\u51fd\u6570<\/h5>\n
- \n
- \u5148\u8981\u627e\u5230str1\u5b57\u7b26\u4e32\u2018\\\\0\u2019\u7684\u4f4d\u7f6e，\u7528i\u6807\u8bb0<\/li>\n
- \u4ecestr2\u4e2d\u4f9d\u6b21\u53d6\u51fa\u6bcf\u4e2a\u5b57\u7b26，\u5b58\u5165str[i]\u7684\u4f4d\u7f6e\u3002str[i++] = str[j++]<\/li>\n<\/ul>\n
while('\\\\0'!=str1[i])
\n{
\ni++;
\n}
\nwhile(str1[i]=str2[j])
\n{
\ni++;
\nj++;
\n}<\/p>\n\u5b57\u7b26\u4e32\u6bd4\u8f83（strcmp）<\/h4>\n
\u6bd4\u8f83\u4e24\u4e2a\u5b57\u7b26\u4e32\u7684\u5185\u5bb9（string compare）<\/p>\n
int strcmp(const char *s1,const char *s2);<\/p>\n
\u53c2\u6570<\/p>\n
- \n
- s1，\u9700\u8981\u88ab\u6bd4\u8f83\u7684\u5b57\u7b26\u4e321；<\/li>\n
- s2，\u9700\u8981\u88ab\u6bd4\u8f83\u7684\u5b57\u7b26\u4e322.<\/li>\n<\/ul>\n
\u8fd4\u56de\u503c<\/p>\n
- \n
- ==0\u00a0 s1\u4e0es2 \u5185\u5bb9\u76f8\u540c<\/li>\n
- >0\u00a0 \u00a0\u5185\u5bb9\u4e0d\u4e00\u6837，\u4e0d\u4e00\u6837\u5904\u5bf9\u5e94\u7684\u5b57\u7b26s1[i] – s2[i] >0<\/li>\n
- <0\u00a0 \u00a0\u00a0\u5185\u5bb9\u4e0d\u4e00\u6837，\u4e0d\u4e00\u6837\u5904\u5bf9\u5e94\u7684\u5b57\u7b26s1[i] – s2[i] <0<\/li>\n<\/ul>\n
\u7cfb\u7edf\u51fd\u6570<\/h5>\n
\u6838\u5fc3\u4ee3\u7801<\/p>\n
if(0==strcmp(str1,str2)) <\/p>\n
\u5b8c\u6574\u4ee3\u7801<\/p>\n
#include <stdio.h>
\n#include <string.h>
\nint main()
\n{
\nchar str1[10]="hallo";
\nchar str2[10]="hello";
\n\/* \u9519\u8bef\u7684\u65b9\u6cd5
\nif(str1==str2)
\n*\/
\n\/\/if(0==strcmp(str1,str2))
\nint ret=strcmp(str1,str2);
\nif(0==ret)
\n{
\nprintf("same\\\\n");
\n}
\nelse
\n{
\nprintf("not same\\\\n");
\n}
\nreturn 0;
\n}<\/p>\n\u4e0d\u7528\u51fd\u6570<\/h5>\n
\u6838\u5fc3\u4ee3\u7801<\/p>\n
- \n
- \u4f7f\u75281\u4e2a\u4e0b\u6807，\u5982\u679cstr1[i]\u548cstr2[i]\u76f8\u540c\u5c31\u7ee7\u7eed\u6bd4\u8f83\u4e0b\u4e00\u4e2a；<\/li>\n
- \u5982\u679c\u4e0d\u540c，str1[i]-str2[i]\u5c31\u662f\u6bd4\u8f83\u7684\u7ed3\u679c\u3002<\/li>\n<\/ul>\n
while(str1[i]==str2[i] && str1[i]!='\\\\0')
\n{
\ni++;
\n}
\nret=str1[i]-str2[i];<\/p>\n\u5b8c\u6574\u4ee3\u7801<\/p>\n
#include <stdio.h>
\n#include <string.h>
\nint main()
\n{
\nchar str1[10]="hallo";
\nchar str2[10]="hello";<\/p>\nint i=0;
\nint ret=0;
\nwhile(str1[i]==str2[i] && str1[i]!='\\\\0')
\n{
\ni++;
\n}
\nret=str1[i]-str2[i];
\nif(0==ret)
\n{
\nprintf("same\\\\n");
\n}
\nelse
\n{
\nprintf("not same\\\\n");
\n}
\nprintf("ret %d\\\\n",ret);
\nreturn 0;
\n}<\/p>\n\u4e8c\u7ef4\u5b57\u7b26\u6570\u7ec4<\/h2>\n
\u4e8c\u7ef4\u5b57\u7b26\u6570\u7ec4\u662f\u7531\u591a\u4e2a\u4e00\u7ef4\u5b57\u7b26\u6570\u7ec4\u7ec4\u6210；\u53ef\u4ee5\u5b58\u50a8\u591a\u4e2a\u5b57\u7b26\u4e32\u7684\u6570\u7ec4\u3002<\/p>\n
\u5b9a\u4e49\u7684\u8bed\u6cd5<\/h4>\n
char a[3][50];<\/p>\n
char \u6570\u7ec4\u7684\u540d\u5b57 \u3010\u884c\u6570\u3011 \u3010\u5217\u6570\u3011\u00a0 \u884c\u3001\u5217\u5fc5\u987b\u4e3a\u6574\u578b\u5e38\u91cf<\/p>\n<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260123115637-697361f50eefc.png\")
<\/p>\n\u521d\u59cb\u5316<\/h4>\n
\/\/\u521d\u59cb\u5316
\nchar strs[3][50]={"how","are","you"};
\nchar strs1[3][50]={{"how"},{"are"},{"you"}};<\/p>\nchar strs2[3][50]={0}; \/\/\u5e38\u7528，\u5269\u4f59\u7684\u5168\u90e8\u88650
\nchar strs3[3][50]={{0}};<\/p>\nchar strs4[][50]={"hello","are","you"};\/\/\u7a7a\u7684\u4f4d\u7f6e\u53ea\u4f1a\u4e3a3<\/p>\n
\u8bbf\u95ee：\u8bfb<\/h4>\n
\/\/\u8bbf\u95ee，\u8bfb
\nprintf("%s\\\\n",strs[0]); \/\/%s–>char[]
\nprintf("%d\\\\n",strs[0][0]); \/\/%s–>char[]<\/p>\nint i=0;
\nint hang=sizeof(strs)\/sizeof(strs[0]); \/\/ 150\/50<\/p>\nfor(i=0;i<hang;i++)
\n{
\nprintf("strs[i]:%s\\\\n",strs[i]);
\n}<\/p>\n\u8bbf\u95ee：\u5199<\/h4>\n
\/\/\u8bbf\u95ee，\u5199
\nstrcpy(strs[0],"aaa");
\nstrcat(strs[2],"!!!");
\nprintf("\u4fee\u6539\u540e：");
\nfor(i=0;i<hang;i++)
\n{
\nprintf("strs[i]:%s\\\\n",strs[i]);
\n}<\/p>\n！\u91cd\u70b9！<\/span><\/h2>\n
\u7b2c\u56db\u7ae0<\/h4>\n
\u7cfb\u7edf\u63d0\u4f9b\u7684\u76f8\u5173\u64cd\u4f5c\u51fd\u6570<\/p>\n
\u719f\u7ec3\u8c03\u7528C\u5e93\u5b57\u7b26（strlen\u3001strcat\u3001strcmp\u3001strcpy）\u4e32\u76f8\u5173\u51fd\u6570<\/p>\n
\u624b\u6495\u4ee3\u7801：strlen\u3001strcpy\u3001strcmp\u3001strcat\u3001\u6392\u5e8f<\/span><\/p>\n<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"
\u76ee\u5f55 \u4e00\u7ef4\u5b57\u7b26\u6570\u7ec4
\n\u5b57\u7b26\u4e32\u5e38\u7528\u76f8\u5173\u51fd\u6570
\n\u83b7\u5f97\u5b57\u7b26\u4e32\u957f\u5ea6（strlen）
\n\u7cfb\u7edf\u8c03\u7528\u51fd\u6570
\n\u4e0d\u7528\u7cfb\u7edf\u51fd\u6570
\n\u5b57\u7b26\u4e32\u590d\u5236\u64cd\u4f5c（strcpy）
\n\u7cfb\u7edf\u8c03\u7528\u51fd\u6570
\n\u4e0d\u7528\u51fd\u6570\u7684\u5b57\u7b26\u4e32\u590d\u5236
\n\u65b9\u6cd5\u4e00
\n\u65b9\u6cd5\u4e8c
\n\u65b9\u6cd5\u4e09
\n\u5b57\u7b26\u4e32\u7684\u62fc\u63a5\u51fd\u6570（strcat）
\n\u7cfb\u7edf\u8c03\u7528\u51fd\u6570
\n\u4e0d\u7528\u51fd\u6570
\n\u5b57\u7b26\u4e32\u6bd4\u8f83（strcmp）
\n\u7cfb\u7edf\u51fd\u6570
\n\u4e0d\u7528\u51fd\u6570
\n\u4e8c\u7ef4\u5b57\u7b26\u6570\u7ec4
\n\u5b9a\u4e49\u7684\u8bed\u6cd5
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