2017.11.27T19_8zuoye

package com.whxiong8;

import java.util.*;

public class Practise8 {

 public static void main(String[] args) {
  Scanner input = new Scanner(System.in);
  System.out.println("第一题");
  System.out.println("*******************************");
  System.out.println("请输入您想打印的行数：");
  int num = input.nextInt();
  for (int i = 0; i < num; i++) {
   for (int j = 0; j <= i; j++) {
    System.out.print((j + 1) + " ");
   }
   System.out.println(" ");
  }
  System.out.println(" ");
  System.out.println("第二题");
  System.out.println("*******************************");
  int i; // 公鸡数
  int j; // 母鸡数
  int k; // 皱鸡数
  for (i = 0; i <= 20; i++) {
   for (j = 0; j <= 33; j++) {
    k = 100 - i - j;
    if (k % 3 == 0 && 5 * i + 3 * j + k / 3 == 100) {
     System.out.println("公鸡数为" + i + "只时" + " 母鸡数为" + j + "只 "
       + "皱鸡数为" + k);
    }
   }
  }
  System.out.println(" ");
  System.out.println("第三题");
  System.out.println("*******************************");
  int[] class1 = new int[3];
  int[] student = new int[4];
  double score = 0;
  int total = 0;
  double sum = 0;
  for (int n = 0; n < class1.length; n++) {
   System.out.println("请输入" + (n + 1) + "班学生的成绩");
   for (int m= 0; m< student.length; m++) {
    System.out.println(" 请输入第" + (m + 1) + "名学生的成绩：");
    System.out.print(" ");
    score = input.nextDouble();
    while (score > 100 || score < 0) {
     System.out.println(" 输入错误，请重新输入成绩：");
     System.out.print(" ");
     score = input.nextDouble();
    }
    if (score >= 85) {
     sum += score;
     total++;
    }
   }
  }
  double age = sum / total;
  System.out.println("成绩大于85分的学生为：" + total);
  System.out.println("成绩大于85分学生的平均分为：" + age);

  System.out.println(" ");
  System.out.println("第四题");
  System.out.println("*******************************");
  int cipher = 111111;// cipher为用户初始密码
  int num1 = 0;// 用户从键盘输入密码
  int money = 0;// 用户输入的取款金额
  System.out.println("请您输入六位数密码：");
  num1 = input.nextInt();
  for (int n = 3; n > 1; n--) {
   if (num1 != cipher) {
    System.out.println("密码输入错误,您还有" + (n - 1) + "次机会,请重新输入：");
    num1 = input.nextInt();
   }
   if (num1 == cipher) {
    System.out.println("请输入您的取款金额：");
    money = input.nextInt();
    while (money % 100 != 0 || money > 1000 || money < 0) {
     System.out.println("您输入金额的金额不合法,请重新输入：");
     money = input.nextInt();
    }
    if (money >= 0 && money <= 1000 && money % 100 == 0) {
     System.out.println("您取了" + money + "元");
     break;
    }
   }
  }
  System.out.println("交易完成请取卡！");

  System.out.println(" ");
  System.out.println("第五题");
  System.out.println("*******************************");
  System.out.println("请输入您要打印菱形的行数(奇数):");
  int rows = input.nextInt();
  while (rows % 2 == 0) {
   System.out.println("请重新输入行数(奇数):");
   rows = input.nextInt();
  }
  for (int n = 1; n <= (rows + 1) / 2; n++) {
   for (int m = 1; m <= (rows + 1) / 2 - n; m++) {
    System.out.print(" ");
   }
   for (int x = 1; x <= 2 * n - 1; x++) {
    System.out.print("*");
   }
   System.out.print(" ");
  }
  for (int n = 1; n <= (rows - 1) / 2; n++) {
   for (int m = n; m >= 1; m--) {
    System.out.print(" ");
   }
   for (int x = rows - 2 * n; x >= 1; x--) {
    System.out.print("*");
   }
   System.out.print(" ");