今天我写了一个简单的计算器程序,能够执行加法、减法、乘法和除法。程序代码如下:
import java.util.Scanner;
public class Calculator {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("Enter first number: ");
double num1 = scanner.nextDouble();
System.out.print("Enter second number: ");
double num2 = scanner.nextDouble();
System.out.println("Choose an operation: +, -, *, /");
char operator = scanner.next().charAt(0);
double result;
switch (operator) {
case '+':
result = num1 + num2;
break;
case '-':
result = num1 - num2;
break;
case '*':
result = num1 * num2;
break;
case '/':
result = num1 / num2;
break;
default:
System.out.printf("Error! operator is not correct");
return;
}
System.out.printf("%.1f %c %.1f = %.1f", num1, operator, num2, result);
}
}
标签:开学,num1,num2,System,result,scanner,日记,out From: https://www.cnblogs.com/fanxn/p/18407410