facebook user growth

#include <iostream>
#include<math.h>
using namespace std;
int main()
{
int month,users,increament;
float ratio;
cout<<"Enter the user of facebook upto January 2012 : ";
cin>>users;
cout<<"Enter the increase ratio of facebook users : ";
cin>>ratio;
ratio=ratio/100;
for(month=1; month<=users; month++)
{
 increament=ratio*users;
 users=users+increament;
 if(users>=25000000)
 {
  cout<<"facebook will reach upto 2.5 billion users in "<<month<<" months.";
  return 0;
 }
}
}
facebook user growth facebook user growth Reviewed by HamzaBashir Ahmad on 07:23:00 Rating: 5