java方法参数传递例题

Question

 

Answer 1

public static double calculator(double num1,double num2,char op){
        double res = 0;
        try{
            switch (op){
                case '+':
                    res = num1 + num2;
                    break;
                case '-':
                    res = num1 - num2;
                    break;
                case '*':
                    res = num1 * num2;
                    break;
                case '/':
                    res = num1 / num2;
                    break;
            }
        } catch (Exception e){
            res = 0;
        }
        return res;
    }