7.3作业

1.

package com.day05;
import java.util.*;
public class Demo1 {
    static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) {
        int[] nums = new int[]{8,4,2,1,23,344,12};
        int sum = 0;
        boolean ak = false;
        System.out.println("请猜第一个数字：");
        int guess = sc.nextInt();
        for(int num : nums){
            if(num==guess){
                ak = true;
                break;
            }
        }
        System.out.println("数列依次是：");
        for (int num : nums) {
            sum += num;
            System.out.print(num+"\t");
        }
        System.out.println();
        System.out.println("数列之和是："+sum);

        if(ak){
            System.out.println("你猜到了有数字"+guess);
        }else{
            System.out.println("你没猜到");
        }
    }
}

2.

package com.day05;
import java.util.*;
public class Demo2 {
    static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) {
        int[] scores = new int[6];
        scores[0]=99;
        scores[1]=92;
        scores[2]=85;
        scores[3]=63;
        scores[4]=60;
        System.out.println("请输入插入的成绩:");
        int newScore = sc.nextInt();
        int index = -1;
        for (int i = 0; i < scores.length; i++) {
            if(newScore>scores[i]){
                index = i;
                break;
            }
        }
        System.out.println("应该放入的下标是:"+index);
        for (int i = scores.length - 2; i >= index; i--) {
            scores[i+1]=scores[i];
        }
        scores[index] = newScore;
        for (int i : scores) {
            System.out.println(i);
        }
    }
}

3.

package com.day05;
import java.util.*;
public class Demo3 {
    static Scanner sr= new Scanner(System.in);
    public static void main(String[] args) {
        System.out.println("请输入四家店的价格");
        int price [] = new int[4];
        for(int i = 0;i<price.length;i++){
            System.out.println("第"+(i+1)+"家店的价格是：");
            price[i] = sr.nextInt();
        }
        int min=price[0];
        for(int i = 0;i<price.length;i++){
            if(min>price[i]){
                min=price[i];
            }
        }
        System.out.println("最低价格是："+min);
    }
}

4.

package com.day05;
import java.util.*;
public class Demo4 {
    static Scanner sr= new Scanner(System.in);

    public static void main(String[] args) {
        System.out.println("请输入一个整数（输入0时程序结束)：");
        int mun = sr.nextInt();
        int max =mun;
        int min =mun;
        while(mun!=0){
            System.out.println("请输入一个整数（输入0时程序结束）：");
            mun = sr.nextInt();
            if(mun==0){
                break;
            }
            if(mun<min){
                min = mun;
            }
            if(mun>max){
                max = mun;
            }
    }
        System.out.println("最小值为："+min+"\t"+"最大值为："+max);
    }
}