Step 1 of 7
Define and call a function
A function packages code under a name. It has a return type, a name, parameters, and a body:
int square(int x) {
return x * x;
}
You call it like square(7), which evaluates to 49.
From now on, some steps are function steps: you write only the function, and hidden tests call it with different inputs. Don't write main on those steps.
Your turn: complete add so it returns the sum of its two parameters.