#include <stdio.h>
#include <process.h>
struct address_list{
char name[10];
char adr[20];
char tel[15];
}info[100];
void save(char *name,int n){
FILE *fp;
int i;
if((fp=fopen(name,"wb"))==NULL)
{
printf("can not open file\n");
exit(0);
}
for(i=0;i<n;i++){
if(fwrite(&info[i],sizeof(struct address_list),1,fp)!=1)
printf("file write error\n");
}
fclose(fp);
}
void show(char *name,int n){
int i;
FILE *fp;
if((fp=fopen(name,"rb"))==NULL){
printf("can not open file\n");
exit(0);
}
for(i=0;i<n;i++){
fread(&info[i],sizeof(struct address_list),1,fp);
printf("%15s%20s%20s\n",info[i].name,info[i].adr,info[i].tel);
}
fclose(fp);
}
void main(){
int i,n;
char filename[50];
printf("how many?\n");
scanf("%d",&n);
printf("please input filename:\n");
scanf("%s",filename);
printf("please input name,address,telphone:\n");
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);
}
show(filename,n);
}
