package com.SC;
import java.util.Scanner;
public class operate {
/**
* 做一个简单的计算器
*/
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
double num1 = 0;
double num2 = 0;
boolean flag = true;
boolean flag1 = true;
double sum = 0;
while(flag){
if(flag1){
System.out.println("请输入第一个数:");
num1 = sc.nextDouble();
}else{
num1 = sum;
}
System.out.println("请输入运算符(+,-,*,%,/):");
String operat = sc.next();
System.out.println("请输入第二个数:");
num2 = sc.nextDouble();
if(flag){
if(operat.equals("+")){
sum = num1+num2;
}else if(operat.equals("-")){
sum = num1-num2;
}else if(operat.equals("*")){
sum = num1*num2;
}else if(operat.equals("%")){
sum = num1%num2;
}else if(operat.equals("/")){
sum = num1/num2;
}
System.out.println(sum);
}
System.out.println("请输入1.继续操作2.重新操作3.退出程序");
String str = sc.next();
if("继续操作".equals(str)){
flag1 = false;
}else if("重新操作".equals(str)){
flag1 = true;
}else if("退出程序".equals(str)){
System.out.println("谢谢使用!");
break;
}
}
}
}
