如何将字符串变量与从文件创建的字符串数组进行比较

你好，我一直在做一个程序，我有一个文件，有三列，其中包括总统的就职年份和离任年份，以及总统的姓名。我试图让用户输入一个总裁，并让程序返回开始和停止年份。我首先打开文件（正确打开），创建3个数组、2个整数数组和一个字符串数组。程序运行，但当我按2时，无论我输入什么名称，bool都保持为false。该文件可在以下位置找到：http://pastebin.com/8h3BJxGD

#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main()
{
char junk, x;
int start[100],stop[100],year,i,count=0;
string names[100],president;
ifstream file;
file.open("presidents.txt");

if(file.fail())
    cout<<"failed to open file"<<endl;

for(i=0;file>>start[i];i++)
    {
    file>>stop[i];
    file.get(junk);
    getline(file,names[i]);
    cout<<start[i]<<stop[i]<<names[i]<<endl;
    count++;
    }
do
{
     cout<<"What would you like to know?"<<endl;
     cout<<"Press 1 for who was President in what year"<<endl;
     cout<<"Press 2 for the years served by a President"<<endl;
     cout<<"Press 3 to stop"<<endl;
     cin>>x;
     if(x=='1')
         {
         bool valid=false;
         cout<<"Enter a year: "<<endl;
         cin>>year;
         for(i=0;i<count;i++)
             {
             if(start[i]<=year&&stop[i]>=year)
                 {
                 cout<<names[i]<<endl;
                 cout<<endl;
                 valid=true;
                 }
             }
         if(valid==false)
             {
            cout<<"Invalid year"<<endl;
             cout<<endl;
             }
         }

   if(x=='2')
         {
         bool valid=false;
         cout<<"Enter a President: "<<endl;
         cin>>president;
         getline(cin,president);
         for(i=0;i<count;i++)
             {
             if(president==names[i])  
                 {
                 cout<<start[i]<<"-"<<stop[i]<<endl;
                 cout<<endl;
                 valid=true;
                 }
             }
         if(valid==false)
             {
             cout<<"Please be more percise"<<endl;
             cout<<endl;
             }
         } 
     }
     while (x!='3');
cin>>junk;
return 0;
}