simple function

int calculation();
int main()
{
cout>>"I have two numbers, I want to add them together";
int firstNumber = 5;
int secondNumber = 7;
int plus;

plus = calculation(firstNumber,secondNumber);
cout<<"the two numbers added together are"<<endl;
cout<<plus;

}

int calculation(int a, int b)
{
int response;
response = a+b;
return response;
}