#include <iostream.h> 

int add_values (int a, int b) 

{ 
   return (a+ b); 
} 

int main () 

{ 
   cout << " 100 + 200 = " << add_values(100, 200) << endl; 
   cout << " 500 + 501 = " << add_values(500, 501) << endl ; 
   cout << "-1 + 1 = " << add_values(-1, 1) << endl; 
}