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referenceParameterMystery1

Language/Type: C++ references reference parameters
Author: Marty Stepp (on 2016/06/19)

What is the output from the following C++ program?

void mystery(int c, int& a, int b) {
    cout << b << " + " << c << " = " << a << endl;
    a++;
    b--;
}

int main() {
    int a = 4;
    int b = 7;
    int c = -2;

    mystery(b, a, c);
    mystery(c, b, 3);
    mystery(b, c, b + a);
    return 0;
}
output

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