convert char to arithmetic operator

Question

I have a char stand for an operator,there are four operators(+ - * /) in total.

How i did :

int Compute(char c, int a, int b)
{
    if(c == '+')  
        return a+b;
    else if(c == '-')     
        return a-b;
    else if(c == '*')
        return a*b;
    else (c == '/')
        return a/b;
}

Is there a more convenient way to do this?

Answer 1

You could use a switch statement:

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");
    }
}