#include<stdio.h>
#include<stdlib.h>
#define MAX 40
int main(){
    FILE *fp;
    char words[MAX];
   
    if((fp = fopen("words","a+")) == NULL){
        fprintf(stdout,"Can't open \"words\" file.\n");
        exit(0);
    }
   
    puts("Enter words to add to the fiie: press the Enter.");
    puts("key at the beginning of a line to terminate.");
    while(gets(words) != NULL && words[0] != '\0'){
        fprintf(fp,"%s",words);
    }
    puts("File contents:");
    rewind(fp);
    while(fscanf(fp,"%s",words) == 1){
        puts(words);
    }
    if(fclose(fp) != 0)
        fprintf(stderr,"Error closing file.\n");
    return 0;
}

请问在这段代码中，为什么要使用rewind()，我想知道哪里改变了指针的指向位置了,谢谢.

哦，好的，谢谢