Question

I keep getting these 2 errors in my code

In function 'int main()':
error: invalid initialization of non-const reference of type 'int&' from a temporary of type 'int'
error: in passing argument 1 of 'void swapInt(int&, int&)'

but the real problem I’m having is with swapInt. I need to take in 2 ints
and then switch their values with their parameters so what was once a is now b
and what was once b is now a. please help!

void swapInt (int &a, int &b);

int main() {
    int a = 1;
    int b = 2;

    swapInt(1, 2);
    cout << a << " " << b;

    return 0;
}

void swapInt (int &a, int &b) {
    int c = a;
    a = b;
    b = c;
    //cout << a << " " << b;
}

Answer 1

Your function works with the address of variables, but you’re passing in number constants. You need to pass in the variables like:

void swapInt (int &a, int &b);

int main() {
    int a = 1;
    int b = 2;

    swapInt(a, b);
    cout << a << " " << b;

    return 0;
}

void swapInt (int &a, int &b) {
    int c = a;
    a = b;
    b = c;
    //cout << a << " " << b;
}