四则运算--计应192 张少有

package zsy;

import java.util.Scanner;

public class ZSY {

public static void main(String[] args) {

kaishi();

}

public static int suijishu() //产生随机数

{

int x=(int)(Math.random ()*(100-1+1));

return x;

}

public static char suijifuhao()//随机符号

{

int x=(int)(Math.random ()*(3-1+1));

if (x==1) return '+';

if (x==2) return '-';

if (x==3) return '*';

else return '/';

}

public static int yunsuan()//产生运算式

{

int x=suijishu();

int x1=suijishu();

char y=suijifuhao();

System.out.println("运算式："+x+y+x1);

if(y=='+')return x+x1;

if(y=='-')return x-x1;

if(y=='*')return x*x1;

else return Math.round (x/x1);

}

public static boolean jiancha()//检查是否正确

{

int sr,zq;zq=yunsuan();

System.out.print("输入答案：");

Scanner sc=new Scanner(System.in);

sr=sc.nextInt();

if(sr==zq){System.out.println("正确！");return true;}

else System.out.println("错误！");return false;

}

public static int chengji(int cishu)

{

int cj=0;

for(int i = 0; i < cishu; i++)

{

if (jiancha()) cj+=1;

else continue;

}

return cj;

}

public static void kaishi()

{

int x = 0;

System.out.print("输入题目数量：");

Scanner sc=new Scanner(System.in);

x=sc.nextInt();

System.out.println("得分："+chengji(x));

}

}