文件学习4

rewind函数

作用：rewind函数的作用是使位置指针重新返回文件的开头，此函数没有返回值

#include<stdio.h>

void main()

{

      FILE * fp1,fp2;

      fp1 = fopen("file1.c","r");

      fp2 = fopen("file2.c","w");

      while(!feof(fp1))

     putchar(gets(fp1));

     rewind(fp1);

     while(!feof(fp1))

     putc(getc(fp1),fp2);

     fclose(fp1);

     fclose(fp2);

}