How do I transform an IF statement with 2 variables onto a switch function using C?

Question

I have an IF-statement that I want to transform into a Switch-statement... But it has 2 variables! Is it possible to do it on C?

It is a rock, paper, scissors game:

Answer 1

In general, the answer is "no": switch statements work with a single variable. However, in some cases you can do the conversion. For example, if you have two variables, a and b, where a can be 0, 1, or 2, and b that can be 0, 1, 2, or 3, you can do a switch like this:

switch (a*10+b) {
    case  0: break; // a == 0, b == 0
    case 10: break; // a == 1, b == 0
    case 20: break; // a == 2, b == 0
    case  1: break; // a == 0, b == 1
    case 11: break; // a == 1, b == 1
    case 21: break; // a == 2, b == 1
    case  2: break; // a == 0, b == 2
    case 12: break; // a == 1, b == 2
    case 22: break; // a == 2, b == 2
    case  3: break; // a == 0, b == 3
    case 13: break; // a == 1, b == 3
    case 23: break; // a == 2, b == 3
}