package day01;

import java.util.Scanner;

public class Demo9 {
	public static void main(String[] args) {
		
		Scanner s1 = new Scanner(System.in);
		
		System.out.println("欢迎使用本系统");
		
		while(true){
			System.out.println("请选择");
			System.out.println("1.常用功能\n2.计算机\n3.退出");
			int i1 = s1.nextInt();
			
			if(i1==1){
				Scanner s2 = new Scanner(System.in);
				while(true){
					System.out.println("欢迎使用常用功能\n请选择\n1.日历\n2.九九乘法表\n3.退出");
					int i2 = s2.nextInt();
					
					if(i2==1){
						
						int sum = 0;
						Scanner s21 = new Scanner(System.in);
						System.out.println("请输入年份：");
						int i22 = s1.nextInt();
						System.out.println("请输入月份：");
						int i23 = s1.nextInt();
						if(i2==2){
							if(i22%4==0&&i22%100!=0||i22%400==0){
								sum = sum+29;
							}else{
								sum = sum+28;
							}
						}else{
							if(i23==1||i23==3||i23==5||i23==7||i23==8||i23==10||i23==12){
								sum = sum+31;
							}else if (i23==4||i23==6||i23==9||i23==11) {
								sum = sum+30;
							}
						}
						int i24 = sum%7;
						int i25 = sum;
						System.out.println("日\t一\t二\t三\t四\t五\t六");
						for (int i = 1; i <= i24; i++) {
							System.out.print("\t");
						}
						for (int i = 1; i <= i25; i++) {
							if (sum%7==6) {
								System.out.print(i+"\n");
							}else{
								System.out.print(i+"\t");
							}
							sum++;
						}
						System.out.println();
						
					}else if (i2==2) {
						
						System.out.println("暂无此功能\nsorry");
						
					}else if (i2==3) {
						break;
					}
					
				}
			}else if(i1==2){
				
				Scanner s3 = new Scanner(System.in);
						while(true){
							System.out.println("请选择\n1.加法计算\n2.减法计算\n3.乘法计算\n4.除法计算\n5.退出系统");
						int i3 = s3.nextInt();
						if(i3==1){
							System.out.println("《-----加法计算-----》");
							System.out.println("感谢使用本系统");
							while(true){
								Scanner in1 = new Scanner(System.in);
									System.out.println(" 请输入一个整数");
									int i31 = in1.nextInt();
									System.out.println(" 请再输入一个数字");
									int i32 = in1.nextInt();
									System.out.println(i31+"+"+i32+"="+(i31+i32));
									Scanner in2 = new Scanner(System.in);
									System.out.println(" 输入“退出”退出系统\n或者随意输入一个数字使系统继续执行");
									String s33 = in2.next();
									String s34 = "退出";
									if(s33.equals(s34)){
										break;
									}
								}
								System.out.println("已退出");
						}else if(i3==2){
							Scanner in3 = new Scanner(System.in);
								System.out.println("《-----减法计算-----》");
								System.out.println("感谢使用本系统");
								while(true){
									System.out.println(" 请输入一个整数");
									int i35 = in3.nextInt();
									System.out.println(" 请再输入一个数字");
									int i36 = in3.nextInt();
									System.out.println(i35+"-"+i36+"="+(i35-i36));
									Scanner in4 = new Scanner(System.in);
									System.out.println(" 输入“退出”退出系统\n或者随意输入一个数字使系统继续执行");
									String s37 = in4.next();
									String s38 = "退出";
									if(s37.equals(s38)){
										break;
									}
								}
								System.out.println("已退出");
								
								
							
						}else if(i3==3){
							Scanner in = new Scanner(System.in);
							System.out.println("《-----乘法计算-----》");
							System.out.println("感谢使用本系统");
							while(true){
								System.out.println(" 请输入一个整数");
								int i39 = in.nextInt();
								System.out.println(" 请再输入一个数字");
								int i40 = in.nextInt();
								System.out.println(i39+"*"+i40+"="+(i39*i40));
								Scanner in1 = new Scanner(System.in);
								System.out.println(" 输入“退出”退出系统\n或者随意输入一个数字使系统继续执行");
								String s41 = in1.next();
								String s42 = "退出";
								if(s41.equals(s42)){
									break;
								}
							}
							System.out.println("已退出");
						}else if(i3==4){
							Scanner in = new Scanner(System.in);
							System.out.println("《-----除法计算-----》");
							System.out.println("感谢使用本系统");
							while(true){
								System.out.println(" 请输入一个整数");
								int i43 = in.nextInt();
								System.out.println(" 请再输入一个数字");
								int i44 = in.nextInt();
								System.out.println(i43+"/"+i44+"="+(i43/i44));
								Scanner in1 = new Scanner(System.in);
								System.out.println(" 输入“退出”退出系统\n或者随意输入一个数字使系统继续执行");
								String s45 = in1.next();
								String s46 = "退出";
								if(s45.equals(s46)){
									break;
								}
							}
							System.out.println("已退出");
						}else if(i3==5){
							break;
						}
						}
						System.out.println("已退出\n欢迎下次使用^_^");
						
						
				
			}else if(i1==3){
				break;
			}
			
			
		}
		System.out.println("已退出\n欢迎下次使用^_^");
		
	}
	
}