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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();
}
}
