public class Calculator {
public static void main(String[] args) {
//写一个计算器,要求实现加减乘除功能,并且能够循环接收新的数据,通过用户交互实现。
//◆思路推荐:
//写4个方法:加减乘除
//利用循环+ switch进行用户交互
//传递需要操作的两个数
//输出结果
boolean loop = true;
Scanner scanner = new Scanner(System.in);
while (loop) {
System.out.println("请输入第一个数字:");
double num1 = scanner.nextDouble();
System.out.println("请输入第二个数字:");
double num2 = scanner.nextDouble();
System.out.println("请继续输入你要选择的:1 +; 2 -; 3 *; 4 /");
String operator = scanner.next();
double result = 0.0;
switch (operator) {
case "+":
result = add(num1, num2);
break;
case "-":
result = sub(num1, num2);
break;
case "*":
result = mul(num1, num2);
break;
case "/":
if (num2 == 0) {
System.out.println("输入不能为零,请重新输入");
continue;
}
result = div(num1, num2);
break;
default:
System.out.println("输入错误,请重新输入");
continue;
}
System.out.println("运算结果为" + result);
System.out.println("继续输入请按Y,否则请按N");
String input = scanner.next();
if ("N".equalsIgnoreCase(input)) {
loop = false;
}
}
scanner.close();
}
public static double add(double... numbers){//加法
double result = numbers[0];
for (int i = 1; i < numbers.length ; i++) {
result += numbers[i];
}
return result;
}
public static double sub(double... numbers){//减法
double result = numbers[0];
for (int i = 1; i < numbers.length ; i++) {
result -= numbers[i];
}
return result;
}
public static double mul(double... numbers){//乘法
double result = numbers[0];
for (int i = 1; i < numbers.length ; i++) {
result *= numbers[i];
}
return result;
}
public static double div(double... numbers){//除法
double result = numbers[0];
for (int i = 1; i < numbers.length ; i++) {
result /= numbers[i];
}
return result;
}
}
写一个计算器
发布时间 2023-03-23 01:30:17作者: 盗版太极