funtc56b.dat

这是一个包含多个语言的指令集

fseek

#include <stdio.h>
long filesize(FILE *stream);
int main(void)
{
    FILE *stream;
    stream = fopen("MYFILE.TXT", "w+");
    fprintf(stream, "This is a test");
    printf("Filesize of MYFILE.TXT is %ld bytes
", filesize(stream));
    fclose(stream);
    return 0;
}
long filesize(FILE *stream)
{
    long curpos, length;
    curpos = ftell(stream);
    fseek(stream, 0L, SEEK_END);
    length = ftell(stream);
    fseek(stream, curpos, SEEK_SET);
    return length;
}