rewind()函数

函数名: rewind
功  能: 将文件指针重新指向一个流的开头
用  法: int rewind(FILE *stream);
程序例:

#include <stdio.h>
#include <dir.h>

int main(void)
{
FILE *fp;
    char *fname = "TXXXXXX", *newname, first;

    newname = mktemp(fname);
    fp = fopen(newname,"w+");
    fprintf(fp,"abcdefghijklmnopqrstuvwxyz");
    rewind(fp);
    fscanf(fp,"%c",&first);
    printf("The first character is: %c/n",first);
    fclose(fp);
    remove(newname);

    return 0;
}