Java_ practice_calculate 简易计算器

public class PracticeDemo1 {
    //计算器2.0
    public static void main(String[] args) {

        count();

    }

    public static void count(){
        Scanner scanner = new Scanner(System.in);
        while (true){

            System.out.println("请输入加减乘除类型，按c结束");
            char C = scanner.next().charAt(0);

            if(C=='c'){
                break;
            }

            System.out.println("请输入需要就算的两个数字：");
            double num1 = scanner.nextDouble();
            double num2 = scanner.nextDouble();
            double total = 0.0;

            switch (C){
                case '+':
                    total = add(num1,num2);
                    System.out.println(total);
                    break;
                case '-':
                    total = sub(num1,num2);
                    System.out.println(total);
                    break;
                case '*':
                    total = mul(num1,num2);
                    System.out.println(total);
                    break;
                case '/':
                    total = div(num1,num2);
                    System.out.println(total);
                    break;
                default:
                    System.out.println("输入错误");

            }

        }

        scanner.close();
    }


    //加法
    public static double add(double a,double b){

        return a+b;

    }

    //减法
    public static double sub(double a,double b){

        return a-b;
    }

    //乘法
    public static double mul(double a,double b){

        return a*b;
    }

    //除法
    public static double div(double a,double b){

        return a/b;
    }

}