十二章 课后5

商品类:

<span style="font-size:18px;">public class Shang {	
    int jia=(int)(Math.random()*10000+1);
	public int a(){
    int b=(int)(Math.random()*10);
    switch(b){
    case 0:
    case 1:
    case 2:
    case 3:
    	System.out.print("请猜测\"公主电动车\"的价格:");
    	break;
    case 4:
    case 5:
    case 6:
    	System.out.print("请猜测\"公主汽车\"的价格:");
    	break;
    case 7:
    case 8:
    case 9:
    	System.out.print("请猜测\"公主自行车\"的价格:");
    	break;
    }
    return b;
	}    
}
</span>

 

猜价格类:

<span style="font-size:18px;">import java.util.*;
public class Jia {
	Scanner input=new Scanner(System.in);
	Shang a=new Shang();
	int b;
    public void a(){
    	for(int i=1;i<=4;i++){
    		b=input.nextInt();
            if(b==a.jia){
    			System.out.println("猜对了!");
    			break;
    		}
    		if(i==4){
    			System.out.println("\n4次没有猜对,下次努力吧!");
    			break;
    		}
    		if(b>a.jia){
    			System.out.print("再小点!");
    		}else if(b<a.jia){
    			System.out.print("再大点!");
    		}
    		System.out.print("\n再猜一次吧:");
    	}
    }
}</span>

测试类:

<span style="font-size:18px;">public class Ceshi {

	public static void main(String[] args) {
        Shang a=new Shang();
        Jia b=new Jia();
        a.a();
        b.a();
	}

}</span>