C结构体数组的应用

#include <stdio.h>//定义结构体存储学生成绩信息struct address_list{    char name[10];    char adr[20];    char tel[15];} info[100];void save(char *name, int n){    FILE *fp;    int i;    fp = fopen(name, "wb");    if(fp == NULL){        printf("cannot open file %s
", name);        exit(0);    }    for(i=0; i<n; i++){        if(fwrite(&info[i], sizeof(struct address_list),1,fp)!=1){            printf("file write error
");        }    }    fclose(fp);}void show(char *name, int n){    FILE *fp;    int i;    fp = fopen(name, "wb");    if(fp == NULL){        printf("cannot open file %s
", name);        exit(0);    }    for(i=0; i<n; i++){        fread(&info[i], sizeof(struct address_list),1,fp);        printf("%15s%20s%20s
", info[i].name, info[i].adr, info[i].tel);    }    fclose(fp);}int main(){    int i, n;        char filename[50] ;    printf("how many ?
");    scanf("%d", &n);    //输入学生数    printf("please input filename:
");    scanf("%s", filename);    //输入文件路径和名称    printf("please input name, address, telephone:
");    for(i=0; i<n; i++){        printf("NO%d", i+1);        scanf("%s%s%s", info[i].name, info[i].adr, info[i].tel);        save(filename, n);    //调用save     }     show(filename, n);    //调用show     return 0;}