实现俩个数的加减乘除:
import java.util.Scanner;
public class Calculator {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
double a = scanner.nextDouble();
double b = scanner.nextDouble();
String c = scanner.next();
scanner.close();// 一定要加上,不然你会发现内存一直在被使用
calculator(a, b, c);// 调用下面的方法实现
}
// 实现输入俩个数进行加减乘除
public static void calculator(double a, double b, String c){
switch (c) {
case "+":
System.out.println(a + b);
break;
case "-":
System.out.println(a - b);
break;
case "*":
System.out.println(a * b);
break;
case "/":
System.out.println(a / b);
break;
default:
System.out.println("不合法的输入");
}
}
}