POJ 2070 Filling Out the Team G++

#include <iostream>
#include <vector>
#include <string>
//谢谢博友文章
using namespace std;
int main()
{
vector<double> a;
vector<int> b,c;
while(1)
{
double x;
int y,z;
cin>>x>>y>>z;
if((x==0)&&(y==0)&&(z==0))
{
break;
}
a.push_back(x);
b.push_back(y);
c.push_back(z);
}
for(int i=0;i<a.size();i++)
{
int flag=0;
if((a[i]<=4.5)&&(b[i]>=150)&&(c[i]>=200))
{
flag=1;
cout<<"Wide Receiver ";
}
if((a[i]<=6.0)&&(b[i]>=300)&&(c[i]>=500))
{
flag=1;
cout<<"Lineman ";
}
if((a[i]<=5.0)&&(b[i]>=200)&&(c[i]>=300))
{
flag=1;
cout<<"Quarterback ";
}
if(flag==0)
{
cout<<"No positions";
}
cout<<endl;
}
return 0;
}