java中简单的加减乘除运算_小学数学加减乘除运算

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//简单的加减乘除运算

import java.util.*;

public cla Arithmetic{

int num1,num2,result;

char op;

public Arithmetic(int x){

this(x,'+');

}

public Arithmetic(int x, char c){

op=c;

Random rd = new Random();

num1=rd.nextInt(x)+1;

num2=rd.nextInt(x)+1;

System.out.print(num1+“ ”+c+“ ” + num2+“ = ”);}

public void testCheck(){

int x=new Scanner(System.in).nextInt();if(op=='+')result=num1+num2;

else if(op=='-')result=num1-num2;

else if(op=='*')result=num1*num2;

else result=num1/num2;

if(x==result)System.out.println(“........Good!”);else System.out.println(“........No, It's wrong!”);}

}

cla Test{

public static void main(String[] args){

new Arithmetic(100).testCheck();

new Arithmetic(10,'*').testCheck();

new Arithmetic(20,'-').testCheck();

new Arithmetic(20,'/').testCheck();

}

}