{"id":288,"date":"2025-11-30T20:50:44","date_gmt":"2025-11-30T12:50:44","guid":{"rendered":"http:\/\/4.189.252.43\/?p=288"},"modified":"2025-11-30T20:50:44","modified_gmt":"2025-11-30T12:50:44","slug":"%e5%ad%97%e7%ac%a6%e4%b8%b2","status":"publish","type":"post","link":"http:\/\/4.189.252.43\/index.php\/2025\/11\/30\/%e5%ad%97%e7%ac%a6%e4%b8%b2\/","title":{"rendered":"\u5b57\u7b26\u4e32"},"content":{"rendered":"\n

1. \u57fa\u672c\u6982\u5ff5<\/h2>\n

C \u8bed\u8a00\u4e2d\u6ca1\u6709\u72ec\u7acb\u7684\u5b57\u7b26\u4e32\u7c7b\u578b\uff0c\u5b57\u7b26\u4e32\u4ee5\u5b57\u7b26\u6570\u7ec4\u5b58\u50a8\uff0c\u5e76\u4ee5 \\0<\/code> \u4f5c\u4e3a\u7ed3\u675f\u6807\u5fd7\u3002debug \u8c03\u8bd5<\/strong><\/p>\n

char s[6] = "Hello";\n<\/code><\/pre>\n
\u6b64\u65f6\u6570\u7ec4\u5b9e\u9645\u957f\u5ea6\u4e3a 6\uff08\u5305\u542b\u7ed3\u675f\u7b26\uff09\u3002<\/p>\n
2. \u5b57\u7b26\u4e32\u7684\u5b9a\u4e49\u65b9\u5f0f<\/h2>\n
2.1 \u5b57\u7b26\u6570\u7ec4\u5b9a\u4e49<\/h3>\n
char s[10] = "Hello";\n<\/code><\/pre>\n
\u5141\u8bb8\u4fee\u6539\u5185\u5bb9\u3002<\/p>\n
2.2 \u6307\u9488\u65b9\u5f0f\u5b9a\u4e49<\/h3>\n
char *p = "Hello";\n<\/code><\/pre>\n
\u6307\u5411\u5b57\u7b26\u4e32\u5e38\u91cf\uff0c\u4e0d\u53ef\u4fee\u6539\u5185\u5bb9\u3002<\/p>\n
3. \u5b57\u7b26\u4e32\u8f93\u5165\u8f93\u51fa<\/h2>\n
3.1 printf<\/code><\/h3>\n
printf("%s", s);\n<\/code><\/pre>\n
3.2 scanf<\/code><\/h3>\n
scanf("%s", s);\n<\/code><\/pre>\n
\u6ce8\u610f scanf<\/code> \u9047\u7a7a\u767d\u5373\u505c\u6b62\uff0c\u4e0d\u5b89\u5168\u3002<\/p>\n
3.3 fgets<\/code><\/h3>\n
fgets(s, sizeof(s), stdin);\n<\/code><\/pre>\n
\u66f4\u5b89\u5168\uff0c\u80fd\u8bfb\u53d6\u7a7a\u683c\u3002<\/p>\n
4. \u5e38\u7528\u5e93\u51fd\u6570\uff08string.h\uff09<\/h2>\n
4.1 \u6c42\u957f\u5ea6<\/h3>\n
strlen()<\/code><\/p>\n
size_t len = strlen(s);\n<\/code><\/pre>\n
4.2 \u62f7\u8d1d<\/h3>\n
copy<\/code><\/p>\n
strcpy<\/code><\/p>\n
strcpy(dest, src);\nstrncpy(dest, src, n);\n<\/code><\/pre>\n
4.3 \u62fc\u63a5<\/h3>\n
strcat(dest, src);\nstrncat(dest, src, n);\n<\/code><\/pre>\n
4.4 \u6bd4\u8f83<\/h3>\n
compare<\/code><\/p>\n
\u8fd4\u56de\u503c\uff1aint<\/code><\/p>\n
strcmp(a, b);\nstrncmp(a, b, n);\n<\/code><\/pre>\n
\u8fd4\u56de\u503c\uff1a0 \u76f8\u7b49\uff1b>0 :a>b\uff1b<0 a<b\u3002<\/p>\n
\u5927\u4e8e\u662f\u5b57\u5178\u5e8f\u5173\u7cfb\uff1a<\/p>\n
a < b<\/code><\/p>\n
aa < ab<\/code><\/p>\n
ba > ab<\/code><\/p>\n
5. \u5b57\u7b26\u4e32\u4e0e\u5185\u5b58\u5b89\u5168<\/h2>\n
5.1 \u7f13\u51b2\u533a\u6ea2\u51fa\u98ce\u9669<\/h3>\n
\u4f7f\u7528 gets<\/code>\u3001\u4e0d\u68c0\u67e5\u957f\u5ea6\u7684 strcpy<\/code> \u90fd\u4f1a\u5bfc\u81f4\u6ea2\u51fa\uff0c\u5e94\u907f\u514d\u3002<\/p>\n
5.2 \u63a8\u8350\u5b89\u5168\u66ff\u4ee3<\/h3>\n
    \n
  • \u8f93\u5165\uff1afgets<\/code><\/li>\n
  • \u62f7\u8d1d\uff1astrncpy<\/code><\/li>\n
  • \u62fc\u63a5\uff1astrncat<\/code><\/li>\n\n<\/ul>\n
    6. \u5b57\u7b26\u4e32\u5904\u7406\u793a\u4f8b<\/h2>\n
    \u793a\u4f8b\uff1a\u7edf\u8ba1\u5c0f\u5199\u5b57\u6bcd\u6570\u91cf<\/h3>\n
    #include <stdio.h>\n#include <string.h>\n#include <ctype.h>\n\nint main() {\n    char s[100];\n    fgets(s, sizeof(s), stdin);\n\n    int count = 0;\n    for (int i = 0; s[i] != '\\0'; i++) {\n        if (islower(s[i])) count++;\n    }\n\n    printf("%d", count);\n    return 0;\n}\n<\/code><\/pre>\n
    7. \u603b\u7ed3<\/h2>\n
      \n
    • C \u5b57\u7b26\u4e32\u672c\u8d28\u662f\u4ee5 \\0<\/code> \u7ed3\u5c3e\u7684\u5b57\u7b26\u6570\u7ec4\u3002<\/li>\n
    • \u4f7f\u7528\u5e93\u51fd\u6570\u5fc5\u987b\u786e\u4fdd\u76ee\u6807\u7a7a\u95f4\u8db3\u591f\u3002<\/li>\n
    • \u6307\u9488\u65b9\u5f0f\u5b9a\u4e49\u7684\u5b57\u7b26\u4e32\u5e38\u91cf\u4e0d\u53ef\u4fee\u6539\u3002<\/li>\n
    • \u8f93\u5165\u5904\u7406\u5c3d\u91cf\u91c7\u7528\u5b89\u5168\u51fd\u6570\uff0c\u4f8b\u5982 fgets<\/code>\u3002<\/li>\n\n<\/ul>\n\n","protected":false},"excerpt":{"rendered":"
      1. \u57fa\u672c\u6982\u5ff5 C \u8bed\u8a00\u4e2d\u6ca1\u6709\u72ec\u7acb\u7684\u5b57\u7b26\u4e32\u7c7b\u578b\uff0c\u5b57\u7b26\u4e32\u4ee5\u5b57\u7b26\u6570\u7ec4\u5b58\u50a8\uff0c\u5e76\u4ee5 \\0 \u4f5c\u4e3a\u7ed3\u675f\u6807\u5fd7\u3002debug \u8c03 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-288","post","type-post","status-publish","format-standard","hentry","category-23"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/4.189.252.43\/index.php\/wp-json\/wp\/v2\/posts\/288","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/4.189.252.43\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4.189.252.43\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4.189.252.43\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4.189.252.43\/index.php\/wp-json\/wp\/v2\/comments?post=288"}],"version-history":[{"count":1,"href":"http:\/\/4.189.252.43\/index.php\/wp-json\/wp\/v2\/posts\/288\/revisions"}],"predecessor-version":[{"id":289,"href":"http:\/\/4.189.252.43\/index.php\/wp-json\/wp\/v2\/posts\/288\/revisions\/289"}],"wp:attachment":[{"href":"http:\/\/4.189.252.43\/index.php\/wp-json\/wp\/v2\/media?parent=288"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4.189.252.43\/index.php\/wp-json\/wp\/v2\/categories?post=288"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4.189.252.43\/index.php\/wp-json\/wp\/v2\/tags?post=288"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}