十二章 课后作业3

package dege;import java.util.Scanner;public class kehou {  int num1;  int num2;  public void a(){  System.out.println("加法:"+num1+"+"+num2+"="+(num1+num2));  }public void b(){  System.out.println("减法"+num1+"-"+num2+"="+(num1-num2));  }  public void c(){  System.out.println("乘法:"+num1+"*"+num2+"="+(num1*num2));  }  public void d(){  System.out.println("除法:"+num1+"/"+num2+"="+(num1/num2));  }}

package dege;import java.util.Scanner;public class kehouo {/** * @param args */public static void main(String[] args) {// TODO Auto-generated method stubkehou n=new kehou();Scanner input=new Scanner(System.in);System.out.println("请输入2数:");n.num1=input.nextInt();n.num2=input.nextInt();System.out.println("请选择:(1.加法2.减法3.乘法4.除法)");int s=input.nextInt();switch(s){case 1:n.a();break;case 2:n.b();break;case 3:n.c();break;case 4:n.d();break;}}}