Firtst numbers and difference

#include <iostream>
using namespace std;

bool my_first(int number)
{
int sum,i;
sum=0;
for(i=1;i<number+1;i++)
if(number%i==0)
 ++sum;
if(sum==2)
 return true;
else
 return false;
}

int main(int argc, char** argv)
{
int x,difference,r;
x=1;
r=0;
for(;;)
{
if(my_first(x))
{
   
   difference=r+1;
cout<<"+"<<difference<<"\n";
cout<<x<<" first"<<endl;
r=0;
}
else
{
++r;
   }
   ++x;
 }
return 0;
}