{"id":54218,"date":"2025-08-13T00:09:37","date_gmt":"2025-08-12T16:09:37","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/54218.html"},"modified":"2025-08-13T00:09:37","modified_gmt":"2025-08-12T16:09:37","slug":"%e5%b5%8c%e5%85%a5%e5%bc%8f%e7%b3%bb%e7%bb%9f%e5%ad%a6%e4%b9%a0day17%e6%96%87%e4%bb%b6%e7%bc%96%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/54218.html","title":{"rendered":"\u5d4c\u5165\u5f0f\u7cfb\u7edf\u5b66\u4e60Day17(\u6587\u4ef6\u7f16\u7a0b)"},"content":{"rendered":"

\u00a01.\u6d41 \u662f\u4ec0\u4e48 ?\u00a0
\n\u00a0 \u00a0 \u6d41 \u662f \u5185\u5b58 \u548c \u786c\u76d8\u76f4\u63a5 \u5f62\u6210\u4e00\u4e2a \u6570\u636e\u901a\u9053\u00a0
\n\u00a0 2.FILE *\u00a0
\n\u00a0 \u00a0 \u6d41\u6307\u9488\u00a0
\n\u00a0\u00a0 \u00a0\u5173\u8054\u5230\u8fd9\u4e2a\u6d41\u4e0a\u00a0
\n\u00a0\u00a0 \u00a0\u4ee3\u8868\u8fd9\u4e2a\u6d41\u00a0
\n\u00a0 3.fopen\u7684\u4f5c\u7528\u00a0
\n\u00a0 \u00a0 \u76f8\u5f53\u4e8e \u5c06 \u786c\u4ef6\u4e0a\u7684\u6587\u4ef6 \u8f6c\u6362\u4e3a \u4e86 \u5185\u5b58\u7684\u7684\u6d41\u6307\u9488\u00a0
\n\u00a0\u00a0 \u00a0\u6d41\u6307\u9488\u00a0
\n\u00a0\u00a0 \u00a0 \u00a0 \u00a0\u63cf\u8ff0\u7684\u662f\u6587\u4ef6\u64cd\u4f5c\u7684\u8fd9\u4e2a\u52a8\u6001\u7684\u5bf9\u8c61\u00a0
\n\u00a0 4.errno \u662f\u7cfb\u7edf\u8bbe\u8ba1\u9519\u8bef\u7801 \u7684\u5168\u5c40\u53d8\u91cf\u00a0
\n\u00a0 \u00a0 errno = 2
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0perror("\u60f3\u8981\u8f93\u51fa\u7684\u5b57\u7b26\u4e32");
\n\u00a0\u00a0 \u00a0\u8f93\u51fa\u6548\u679c:
\n\u00a0\u00a0 \u00a0 \u00a0 \u60f3\u8981\u8f93\u51fa\u7684\u5b57\u7b26\u4e32:\u9519\u8bef\u539f\u56e0
\n\u00a0\u00a0 \u00a0 \u00a0\u00a0<\/p>\n

\u00a0\u00a0
\n\u00a0\/\/2.\u8bfb\u5199\u00a0
\n\u00a0 \u00a0 \u00a0fgetc\/fputc \/\/\u5355\u4e2a\u5b57\u7b26\u8bfb\u5199\u00a0
\n\u00a0
\n\u00a0
\n\u00a0\u00a0 \u00a0int fgetc(FILE *stream);
\n\u00a0\u00a0 \u00a0\u529f\u80fd:
\n\u00a0\u00a0 \u00a0 \u00a0\u4ecestream\u4e2d\u8bfb\u53d6\u5b57\u7b26\u00a0
\n\u00a0\u00a0 \u00a0\u53c2\u6570:
\n\u00a0\u00a0 \u00a0 @stream \u00a0\u8981\u8bfb\u53d6\u7684\u6587\u4ef6\u6d41\u6307\u9488\u00a0
\n\u00a0\u00a0 \u00a0\u8fd4\u56de\u503c:
\n\u00a0\u00a0 \u00a0\u6210\u529f \u8bfb\u53d6\u5230\u7684\u5b57\u7b26\u7684ASCII\u7801\u503c\u00a0
\n\u00a0\u00a0 \u00a0\u5931\u8d25 EOF\u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u6ce8\u610f: \u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u6587\u4ef6\u7ed3\u5c3e\u4e5f\u662fEOF
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0\u7cfb\u7edf\u4e2d，\u9ed8\u8ba4\u6253\u5f00\u4e86\u4e09\u4e2a\u6587\u4ef6，\u76f4\u63a5\u53ef\u4ee5\u7528\u00a0
\n\u00a0\u00a0 \u00a0\u6807\u51c6\u8f93\u5165 — stdin \u00a0 — \u5173\u8054\u5230\u952e\u76d8\u00a0
\n\u00a0\u00a0 \u00a0\u6807\u51c6\u8f93\u51fa — stdout \u00a0— \u5173\u8054\u5230\u5c4f\u5e55
\n\u00a0\u00a0 \u00a0\u6807\u51c6\u51fa\u9519 — stderr \u00a0— \u5173\u8054\u5230\u5c4f\u5e55\u00a0
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0getchar() <=> fgetc(stdin);\u00a0\u00a0 \u00a0<\/p>\n

\u00a0\u00a0 \u00a0fputc\u00a0
\n\u00a0\u00a0 \u00a0int fputc(int c, FILE *stream);
\n\u00a0 \u00a0 \u529f\u80fd:
\n\u00a0\u00a0 \u00a0 \u00a0 \u5c06\u5b57\u7b26 c \u5199\u5230 stream\u4e2d
\n\u00a0 \u00a0 \u53c2\u6570:
\n\u00a0 \u00a0 \u00a0@c \u00a0 \u00a0 \u00a0\u5c31\u662f\u8981\u5199\u7684\u5b57\u7b26\u00a0
\n\u00a0 \u00a0 \u00a0@stream \u8981\u64cd\u4f5c\u7684\u6587\u4ef6\u00a0
\n\u00a0 \u00a0 \u8fd4\u56de\u503c:
\n\u00a0 \u00a0 \u00a0 \u6210\u529f \u8fd4\u56de\u88ab\u5199\u5165\u7684\u5b57\u7b26\u00a0
\n\u00a0 \u00a0 \u00a0 \u5931\u8d25 EOF \u00a0\u00a0 \u00a0 \u00a0<\/p>\n

\u00a0\u00a0
\n\u00a0 \u00a0
\n\u00a0
\n\u5173\u95ed:
\n\u00a0 fclose()
\n\u00a0 \u00a0 int fclose(FILE *stream);
\n\u00a0\u00a0 \u00a0\u529f\u80fd:
\n\u00a0\u00a0 \u00a0 \u00a0 \u5173\u95ed\u6d41\u6307\u9488，\u5e76\u4e14\u5237\u65b0\u6d41\u4e2d\u7684\u6570\u636e\u5230\u6307\u5b9a\u4f4d\u7f6e\u00a0
\n\u00a0\u00a0 \u00a0 \u00a0\/\/ \u5173\u95ed\u5e95\u5c42\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u00a0
\n\u00a0\u00a0 \u00a0\u8fd4\u56de\u503c:
\n\u00a0\u00a0 \u00a0 \u6210\u529f 0
\n\u00a0\u00a0 \u00a0 \u5931\u8d25 EOF
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0<\/p>\n

\u00a0 \u00a0
\n\u00a0 \u00a0
\n\u00a0
\n\u00a0\u00a0 \u00a0
\n\u00a0
\n\u00a0 \u56fe\u7247 — \u4e8c\u8fdb\u5236\u6587\u4ef6\u00a0
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 01000101 0 —>\u786c\u76d8\u00a0
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u6587\u672c\u6587\u4ef6\u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0"hello" –ASCII—>\u7f16\u7801\u683c\u5f0f \u5b58\u653e\u5230\u8ba1\u7b97\u673a\u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a00
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a01000 0000\u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0windows\u7cfb\u7edf\u4e0b —\u5b9e\u73b0\u6587\u4ef6\u64cd\u4f5c\u662f \u9700\u8981 \u533a\u5206\u6587\u672c\u6587\u4ef6 \u548c \u4e8c\u8fdb\u5236\u6587\u4ef6\u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0linux\u4e0b \u64cd\u4f5c\u65f6 \u4e0d\u533a\u5206\u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0windows\u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a012345\\\\r\\\\n
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 1310\u00a0\u00a0 \u00a0 \u00a0\u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 11011010
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0linux
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a012345\\\\n
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0
\n\u00a0\u00a0
\n\u00a0\u00a0 \u00a0 fgets\/fputs\u00a0
\n\u00a0 \u00a0\u00a0
\n\u00a0 \u00a0 \u00a0fgets \/\/gets — gets \u7f16\u8bd1\u5668\u4e0d\u63a8\u8350\u7528，\u63a8\u8350\u4f7f\u7528fgets \u00a0<\/p>\n

\n\u00a0\u00a0 \u00a0 char *fgets(char *s, int size, FILE *stream);\u00a0\u00a0 \u00a0\u00a0
\n\u00a0\u00a0 \u00a0 \u529f\u80fd:
\n\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u4ecestream \u4e2d\u8bfb\u53d6\u4e00\u4e2a\u5b57\u7b26\u4e32\u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u5c06\u5b57\u7b26\u4e32，\u4fdd\u5b58\u5230s\u6307\u5b9a\u7684size\u5927\u5c0f\u4e00\u5757\u7a7a\u95f4
\n\u00a0 \u00a0 \u53c2\u6570:
\n\u00a0 \u00a0 \u00a0 @s \u00a0\u8868\u793a\u5b58\u50a8\u8bfb\u53d6\u7ed3\u679c\u7684 \u4e00\u5757\u5b57\u7b26\u7a7a\u95f4\u00a0
\n\u00a0 \u00a0 \u00a0 @size \u00a0\u8868\u793a\u4e00\u6b21\u8bfb\u53d6\u591a\u5c11\u4e2a\u5b57\u8282\u00a0
\n\u00a0 \u00a0 \u00a0 @stream \u5c31\u662f\u8981\u8bfb\u53d6\u7684\u6587\u4ef6\u00a0
\n\u00a0 \u00a0\u8fd4\u56de\u503c:
\n\u00a0 \u00a0 \u00a0\u6210\u529f \u8fd4\u56de s
\n\u00a0 \u00a0 \u00a0\u5931\u8d25 NULL\u00a0
\n\u00a0 \u00a0 \u00a0 \u6ce8:\u00a0
\n\u00a0\u00a0 \u00a0 \u00a0 \u00a0 1. \u8bfb\u5230\u6587\u4ef6\u7ed3\u5c3e\u4e5f\u8fd4\u56deNULL\u00a0\u00a0 \u00a0\u00a0
\n\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u51fa\u9519\u4e5f\u662fNULL\u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u3010\u95ee\u9898\u3011 — \u90a3\u4e48\u5982\u679c\u8fd4\u56de\u503c\u4e3aNULL \u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u5230\u5e95\u662f\u51fa\u9519\u4e86，\u8fd8\u662f\u5230\u8fbe\u6587\u4ef6\u7ed3\u5c3e\u4e86?
\n\u00a0 \u00a0 \u00a0\u00a0 \u00a0 \u00a02. fgets \u8bfb\u53d6\u7ed3\u675f\u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 (1) EOF\u4f1a\u7ed3\u675f \u00a0 \u00a0\/\/\u8bfb\u5230\u6587\u4ef6\u7ed3\u5c3e \u00a0— EOF\u5e76\u4e0d\u5b58\u5728\u6587\u4ef6\u4e2d，\u53ea\u662f\u5230\u8fbe\u7ed3\u5c3e\u65f6\u7684\u6807\u5fd7\u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 (2) \u9047\u5230'\\\\n' \u00a0 \u00a0 \/\/ '\\\\n' \u4f1a\u88ab \u8bfb\u53d6\u5230\u6700\u7ec8\u7684 buffer\u4e2d
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 (3) \u8bfb\u6ee1size-1\u4e2a\u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 3.fgets \u4f1a\u81ea\u5df1\u5728 buffer\u4e2d\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\u7684\u540e\u9762 \u52a0 '\\\\0' — \u5904\u7406\u6210\u5b57\u7b26\u4e32\u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 4.fgets \u6bd4 gets \u66f4\u5b89\u5168
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u53ef\u4ee5\u6307\u5b9a\u8bfb\u53d6\u591a\u5c11\u4e2a\u5b57\u8282\u7684\u6570\u636e\u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 fgets \u66f4\u63a8\u8350\u4f7f\u7528\u00a0<\/p>\n

\u00a0\u00a0 \u00a0fputs
\n\u00a0 \u00a0 int fputs(const char *s, FILE *stream);
\n\u00a0\u00a0 \u00a0\u529f\u80fd:
\n\u00a0\u00a0 \u00a0 \u00a0 \u00a0\u5c06s\u4e2d\u7684\u5b57\u7b26\u4e32，\u8f93\u51fa\u5230 stream\u5bf9\u5e94\u6587\u4ef6\u4e2d\u00a0
\n\u00a0\u00a0 \u00a0\u53c2\u6570:
\n\u00a0\u00a0 \u00a0 \u00a0@s \u00a0 \u00a0 \u00a0 \u8981\u8f93\u51fa\u7684\u5b57\u7b26\u4e32\u7684\u5730\u5740\u00a0
\n\u00a0\u00a0 \u00a0 \u00a0@stream \u00a0\u8981\u8f93\u51fa\u5230\u7684\u6587\u4ef6\u00a0
\n\u00a0\u00a0 \u00a0\u8fd4\u56de\u503c:
\n\u00a0\u00a0 \u00a0 \u00a0\u6210\u529f \u975e\u8d1f\u503c
\n\u00a0\u00a0 \u00a0 \u00a0\u5931\u8d25 EOF \u00a0
\n\u00a0\u00a0 \u00a0 \u00a0
\n\u00a0\u00a0 \u00a0\u6ce8\u610f:
\n\u00a0\u00a0 \u00a0 \u00a0fputs \u4e0d\u4f1a\u81ea\u52a8\u8f93\u51fa\u4e00\u4e2a '\\\\n'
\n\u00a0\u00a0 \u00a0 \u00a0puts \/\/\u81ea\u52a8\u4f1a\u8f93\u51fa\u4e00\u4e2a '\\\\n'
\n\u00a0\u00a0 \u00a0 \u00a0fputs\u8f93\u51fa\u7ed3\u675f\u7684\u6761\u4ef6 —\u662f\u9047\u5230 '\\\\0'
\n\u00a0\u00a0 \u00a0 \u00a0
\n\u00a0\u00a0 \u00a0 \u00a0
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0 \u00a0<\/p>\n

\u00a0 \u00a0
\n\u00a0 \u00a0\u62f7\u8d1d\u666e\u901a\u6587\u4ef6\u00a0
\n\u00a0 \u00a0\u62f7\u8d1d\u4e8c\u8fdb\u5236\u6587\u4ef6 \/\/\u56fe\u7247 \u8bd5\u8bd5\u00a0
\n\u00a0 \u00a0
\n\u00a0 \u00a0\u6ce8\u610f:
\n\u00a0 \u00a0 \u00a0fgets \u548c fputs \u5b9e\u73b0\u62f7\u8d1d\u6587\u4ef6\u00a0
\n\u00a0\u00a0 \u00a0 \u5bf9\u4e8e\u4e8c\u8fdb\u5236\u6587\u4ef6 –\u95ee\u9898\u5f88\u5927
\n\u00a0\u00a0 \u00a0 \u4e8c\u8fdb\u5236\u6587\u4ef6\u4e2d \u5b58\u50a8\u5927\u91cf\u7684 '\\\\0'
\n\u00a0\u00a0 \u00a0 fgets\u8bfb\u53d6\u6ca1\u6709\u95ee\u9898
\n\u00a0\u00a0 \u00a0 \u4f46\u662ffputs\u662f\u8981\u8f93\u51fa\u5b57\u7b26\u4e32\u00a0
\n\u00a0\u00a0 \u00a0 \u800c\u5b57\u7b26\u4e32\u9047\u5230 '\\\\0' \u5c31\u7ed3\u675f\u00a0
\n\u00a0\u00a0 \u00a0\u00a0
\nfread\/fwrite \/\/\u6309\u5bf9\u8c61\u8bfb\u5199\u00a0
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/\u4e8c\u8fdb\u5236\u8bfb\u5199\u51fd\u6570\u00a0
\n\u00a0\u00a0 \u00a0\u00a0
\nsize_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream);
\n\u529f\u80fd:
\n\u00a0 \u00a0 \u4ece\u6307\u5b9a\u7684\u6587\u4ef6\u4e2dstream\u8bfb\u53d6nmemb\u4e2a\u5143\u7d20，\u6bcf\u4e2a\u5143\u7d20size\u5927\u5c0f\u7684 \u8fd9\u4e48\u591a\u4e2a\u6570\u636e，
\n\u00a0\u00a0 \u00a0\u5b58\u653e\u5230ptr\u6307\u5b9a\u7684\u4e00\u5757\u7a7a\u95f4\u00a0
\n\u53c2\u6570:
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