how to convert character into operator code example

Example: how to convert character into operator

int Compute(char c, int a, int b)
{
    switch (c) {  
    case '+': return a+b;
    case '-': return a-b;
    case '*': return a*b;
    case '/': return a/b;
    default: throw std::runtime_error("No such operator");
    }
}