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关于文件操作的一点细节(引用别人的)(2007-03-06 09:11:00)

摘要:
/* --------------------------------------------- ** Test File Function ** author: smileonce 2005-06-16 */ #include <stdio.h> int freadline(FILE * f, char * buf); int main(int argc, char* argv[]) { FILE * f; int i; char buf[255]; // write some number to a file for testing. f = fopen("F:\\tmp\\FileSy\\Debug\\testfile.txt", "w"); for (i=0; i<10; i++) fprintf(f, "origin : %d\n", i); fclose(f); // test ... f = fopen("F:\\tmp\\FileSy\\Debug\\testfile.txt", "r+"); for (i=0; i<5; i++) { freadline(f, buf); printf("%s\n", buf); } fseek(f, 0L, SEEK_CUR); //use this to refresh the file, //same function as fflush(), fgetpos(), fsetpos(). for (i=5; i<8; i++) fprintf(f, "replace: %d\n", i); fclose(f); return 0; } // read a line from file stream int freadline(FILE * f, char * buf) { int count=0, ch; while((ch=fgetc(f)) != EOF) if (ch != '\n') buf[count++] = (char)ch; else break; buf[count++] = '\0......

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