自动生成小学四则运算程序

import java.lang.*;
import java.util.Scanner;
public class kq {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
int a,b,c;
int systemanswer=0;
int useranswer=0;
int rightnumber=0;
char op=0;
System.out.println("欢迎使用自动生成小学四则运算程序，本程序每一次出十道题，用户做对6题或6题以上即退出程序");
do{
for(int i=1;i<=10;i++)
{
a=1+(int)(Math.random()*10);
b=1+(int)(Math.random()*10);
c=1+(int)(Math.random()*4);
switch(c)
{
case 1:
op=‘+‘;
systemanswer=a+b;
break;
case 2:
op=‘-‘;
systemanswer=a-b;
break;
case 3:
op=‘*‘;
systemanswer=a*b;
break;
case 4:
op=‘/‘;
systemanswer=a/b;
break;
default:
System.out.printf("无效");
}
System.out.printf("%d%c%d=?\n",a,op,b);
Scanner in=new Scanner(System.in);
useranswer=in.nextInt();
if(useranswer==systemanswer)
{
System.out.printf("right!\n");
rightnumber++;
}
else
{
System.out.printf("wrong!\n");
}
}
System.out.printf("总分%d\n",rightnumber*10);
System.out.printf("百分比%d%%\n",rightnumber*10);
if(rightnumber*10<60)
{
System.out.printf("再来一遍\n");
rightnumber=0;
}
}while(rightnumber*10<60);

}

}

自动生成小学四则运算程序

原文：http://www.cnblogs.com/kangqu/p/4369193.html