How to use the return value of a function with parameters inside another function

Question

All these functions are outside the int main():

int func1(int x) {

    int v1 = 6 * x;
    return v1; // the input argument will be 2, so v1 = 12
}

int func2()         


        

Answer 1

The function needs an argument, so pass it an argument.

It's as simple as that.