Program menentukan bilangan bulat atau pecahan

#include <iostream>
using namespace std;
//Created by Stephen Setiawan
//facebook.com/5371awan
void main()
{
float a;
int b=0;
cout<<"Masukkan Bilangan: ";cin>>a;
b=a;
if(a==b)
{cout<<"bilangan bulat"<<endl;}
else
{cout<<"Bilangan pecahan"<<endl;}
system("pause");
}