java开关设计与实现-用java构建计算器（带开关）

1、java_java构建计算器（带开关）我正在使个开关计算两个数字，但是当我尝试做任何类型的运算符时，我只是继续0。/importsimport java.util.Scanner;public class Calculator public static void main (String args) /get first numberScanner scan = new Scanner(System.in);System.out.println(Please enter the first number: );int num1 = scan.nextInt();/ get second nu

2、mberSystem.out.println(Please enter the second number: );int num2 = scan.nextInt();/ what the user wants to doSystem.out.println(Please enter the method you would like to use + (+ , - , * , / , ) );String method = scan.next();char operation = method.charAt(0);String output = ;/switch for first numbe

3、rswitch(num1) case 0:output+= zero;break;case 1:output+= one;break;case 2:output+= two;break;case 3:output+= three;break;case 4:output+= four;break;case 5:output+= five;break;case 6:output+= six;break;case 7:output+= seven;break;case 8:output+= eight;break;case 9:output+= nine;break;case 10:output+=

4、 ten;break;/ operation the user wants to useswitch (operation)case + : output += plus;break;case - : output += minus;break;case * : output += times;break;case / : output += divided by;break;case : output += to the power of;break;/switch for second numberswitch (num2) case 0:output += zero;break;case

5、 1:output += one;break;case 2:output += two;break;case 3:output += three;break;case 4:output += four;break;case 5:output += five;break;case 6:output += six;break;case 7:output += seven;break;case 8:output += eight;break;case 9:output += nine;break;case 10:output += ten;break;/ calculate the answerin

6、t answer = 0 ;switch (answer) case + : answer = (answer + (num1 + num2);break;case - : answer = (answer + (num1 - num2);break;case * : answer = (answer + (num1 * num2);break;case / : answer = (answer + (num1 / num2);break;case : answer = (answer + (int) (Math.pow(num1,num2) );break;System.out.println(output + equals + answer );我很