#include<iostream>
#include<cstdlib>
#include<fstream>
#include<cstring>
#include<cctype>
using namespace std;
int addone(fstream&);
int lookup(fstream&);
int main(void)
{
int choice;
fstream file("telbook.txt", ios::out|ios::out);
if(!file)
cout<<"file open fail"<<endl;
else
{
do
{
cout<<"function choice: (1)add new tel. (2)lookup tel (3)end :";
cin>>choice;
if(choice==1)
addone(file);
else if(choice==2)
lookup(file);
else if(choice>3)
cout<<"number is too large , try again"<<endl;
}while(choice!=3);
cout<<"goodbye "<<endl;
}
file.close();
system("pause");
return 0;
}
int addone(fstream &file1)
{
char name[20];
int num;
cout<<"enter new name : ";
cin.get(name,20);
cout<<"enter tel number : ";
cin>>num;
file1<<name<<num<<endl;
return 0;
}
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