#include<iostream>#include<fstream>#include<iomanip>#include<cctype>#include<cstdlib>using namespace std;struct info{ char name[20]; int age; char address[20]; char phone[20]; char email[20];};void main(){ fstream file; char again; info person; file.open("****er.txt",ios::out||ios::binary||ios::app); if(!file) { cout<<"文件****er.txt打开失败！\n"; exit(0); } do { cout<<"\n下面开始输入信息！！\n"; cout<<"请输入姓名！"; cin.getline(person.name,20); cout<<"请输入年龄！"; cin>>person.age; cin.ignore(); cout<<"请输入电话号码！"; cin.getline(person.phone,20); cout<<"请输入地址！"; cin.getline(person.address,20); cout<<"请输入邮箱！"; cin.getline(person.email,20); file.write((char*)&person,sizeof(person)); cout<<"还要输入一个学生的信息吗？（y/n）"; cin>>again; cin.ignore(); }while(toupper(again)=='Y'); file.close(); //下面显示所有数据！ cout<<"\n显示数据！\n"; file.open("****er.txt",ios::in||ios::binary); if(!file) { cout<<"文件****er.txt打开失败！\n"; exit(0); } while(!file.eof()) { file.read((char*)&person,sizeof(person)); cout<<"姓名："<<person.name<<endl; cout<<"年龄："<<person.age<<endl; cout<<"电话："<<person.phone<<endl; cout<<"地址："<<person.address<<endl; cout<<"邮箱："<<person.email<<endl; cout<<"\n按任意键继续下一个！"; cin.get(again); } cout<<"现实完毕！！\n"; file.close(); system("pause");}为什么，我读取的时候就只有一个学生的信息啊？还有cin.ignore()到底是什么作用啊？
