java 用键盘输入1--100的随机数;

import java.util.Scanner;

//练习 Math数学类用键盘输入1--100的随机数;

public class Qu1121 {

public static void main(String[] args){

int n = 0;

while (true) {

System.out.println("请猜测一个100以内的正整数<负值或0退出>");

System.out.println("请猜测>>");

int a = testRandom();

// System.out.println(testRandom());

int b = testInt();

if (b <= 0) {

System.out.println("游戏结束");

break;

}

if (b > a) {

System.out.println("大了");

}else if( b

System.out.println("小了");

}else{

System.out.println("恭喜您经过了"+n+"次的猜测被您猜出来了");

System.out.println("继续游戏请按y或Y其他键退出");

String c = testString();

if (c.equals("y")||c.equals("Y")) {

System.out.println("游戏结束");

break;

}

}

}

}

private static String testString() {

Scanner scan = new Scanner(System.in);

return scan.nextLine();

}

private static int testInt() {

Scanner sc = new Scanner(System.in);

int b = sc.nextInt();

return b;

}

private static int testRandom() {

int a = (int)(Math.random()*100);

return a;

}

}