\n| a+<\/td>\n | \u8bfb\u5199（\u53ef\u8bfb\u53ef\u8ffd\u52a0）<\/td>\n | \u4fdd\u7559\u5185\u5bb9<\/td>\n | \u521b\u5efa\u65b0\u6587\u4ef6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\u5173\u952e\u6ce8\u610f\u4e8b\u9879<\/h5>\nsizeof vs strlen：<\/p>\n char buf[100] = "hello";
\nsizeof(buf); \/\/ 100（\u5185\u5b58\u5360\u7528）
\nstrlen(buf); \/\/ 5（\u9047'\\\\0'\u505c\u6b62）<\/p>\n fputs\u7279\u6027：\u5199\u5165\u5b57\u7b26\u4e32\u65f6\u4e0d\u5305\u542b\u7ed3\u5c3e'\\\\0'<\/p>\n \u5173\u952e\u6280\u5de7\u603b\u7ed3<\/h4>\n\u6587\u4ef6\u6253\u5f00\u5b89\u5168\u89c4\u8303：<\/p>\n FILE *fp = fopen("data.txt", "r");
\nif (fp == NULL)
\n{
\n perror("fopen failed");
\n return -1;
\n}<\/p>\n EOF\u5904\u7406\u6280\u5de7：<\/p>\n int ch;
\nwhile ((ch = fgetc(fp)) != EOF)
\n{
\n putchar(ch);
\n}<\/p>\n \u4ee3\u7801<\/h4>\nopon.c<\/h5>\n#include <stdio.h><\/p>\n int main(int argc, const char *argv[])
\n{
\n FILE *fp = fopen(".\/1.txt", "w");
\n if(NULL == fp)
\n {
\n printf("oppen error\\\\n");
\n return -1;
\n }
\n printf("oppen ok\\\\n");
\n return 0;
\n}<\/p>\n read.c<\/h5>\n#include <stdio.h><\/p>\n int main(void)
\n{
\n FILE *fp = fopen(".\/2.txt", "r");
\n if(NULL == fp)
\n {
\n printf("oppen error\\\\n");
\n return -1;
\n }<\/p>\n printf("oppen ok\\\\n");<\/p>\n int ret ;
\n while(ret != EOF)
\n {
\n ret = fgetc(fp);
\n if(EOF == ret)
\n {
\n puts("");
\n return -1;
\n }
\n printf("%c", ret);
\n }<\/p>\n return 0;
\n}<\/p>\n write.c<\/h5>\n#include <stdio.h>
\n#include <string.h><\/p>\n int main(int argc, const char *argv[])
\n{
\n FILE *fp = fopen(".\/1.txt", "w");
\n if(NULL == fp)
\n {
\n printf("oppen error\\\\n");
\n return -1;
\n }
\n printf("oppen ok\\\\n");<\/p>\n char s[100] = "hello world";
\n int i;
\n for(i = 0;i < strlen(s); ++i)
\n {
\n fputc(s[i], fp);
\n }<\/p>\n fclose(fp);<\/p>\n return 0;
\n}<\/p>\n copy.c<\/h5>\n#include <stdio.h><\/p>\n int main(int argc, const char *argv[])
\n{
\n if(argc != 3)
\n {
\n printf("Usage : .\/a.out <srcfile> <destfile>\\\\n");
\n return -1;
\n }<\/p>\n FILE *srcfp = fopen(argv[1], "r");
\n FILE *dstfp = fopen(argv[2], "w");
\n if(NULL == srcfp || NULL == dstfp)
\n {
\n printf("fopen error\\\\n");
\n return -1;
\n }<\/p>\n while(1)
\n {
\n int ret = fgetc(srcfp);
\n if(EOF == ret)
\n {
\n break;;
\n }
\n fputc(ret, dstfp);
\n }
\n fclose(srcfp);
\n fclose(dstfp);
\n return 0;
\n}<\/p>\n fgets.c<\/h5>\n#include <stdio.h><\/p>\n int main(int argc, const char *argv[])
\n{
\nFILE *fp = fopen("1.txt", "r");
\nif (NULL == fp)
\n{
\nprintf("fopen error\\\\n");
\nreturn -1;
\n}<\/p>\n char s[100] = {0};<\/p>\n char *p = fgets(s, sizeof(s), fp);
\nif (NULL == p)
\n{
\nprintf("error or end of file\\\\n");
\n}
\nprintf("s = %s\\\\n", s);<\/p>\n fclose(fp);<\/p>\n return 0;
\n}<\/p>\n fputs<\/h5>\n#include <stdio.h><\/p>\n int main(int argc, const char *argv[])
\n{
\nFILE *fp = fopen("1.txt", "w");
\nif (NULL == fp)
\n{
\nprintf("fopen error\\\\n");
\nreturn -1;
\n}<\/p>\n fputs("hello world", fp);<\/p>\n char str[32] = {"how are you"};
\nfputs(str, fp);<\/p>\n char *pstr = "hello world";
\nfputs(pstr, fp);<\/p>\n fclose(fp);<\/p>\n return 0;
\n}<\/p>\n fgetsCat<\/h5>\n#include <stdio.h><\/p>\n int main(int argc, const char *argv[])
\n{
\n if(argc != 2)
\n {
\n printf("error\\\\n");
\n return -1;
\n }<\/p>\n FILE *fsrc = fopen(argv[1], "r");
\n if(NULL == fsrc)
\n {
\n printf("oppen error\\\\n");
\n return -1;
\n }<\/p>\n char s[100];<\/p>\n char *save = NULL; <\/p>\n while(1)
\n {
\n save = fgets(s, sizeof(s), fsrc);
\n if(NULL == save)
\n {
\n break;
\n }
\n puts(save);
\n }<\/p>\n fclose(fsrc);<\/p>\n return 0;
\n}<\/p>\n fgetsFputsCopy<\/h5>\n#include <stdio.h><\/p>\n int main(int argc, char *argv[])
\n{
\n if(argc != 3)
\n {
\n printf("error\\\\n");
\n return -1;
\n }
\n FILE *fsrc = fopen(argv[1], "r");
\n FILE *fdest = fopen(argv[2], "w");
\n if(NULL == fsrc || NULL == fdest)
\n {
\n printf("open error\\\\n");
\n return -1;
\n }<\/p>\n char s[100];<\/p>\n char *save = NULL;
\n while(1)
\n {
\n save = fgets(s, sizeof(s), fsrc);
\n if(NULL == save)
\n {
\n break;
\n }
\n int t = fputs(save, fdest);
\n if(EOF == t)
\n {
\n break;
\n }
\n }<\/p>\n fclose(fsrc);
\n fclose(fdest);<\/p>\n return 0;
\n}<\/p>\n \u603b\u7ed3<\/h4>\n\u6587\u4ef6\u7c7b\u578b\u672c\u8d28：<\/p>\n |