package studentmanagement;
import java.util.Scanner;

public class Books {

	public static void main(String[] args) {
		
		int [] arr1 = new int[5];
		String arr2[] = new String[5];
		double [] arr3 = new double[5];
		Scanner sca = new Scanner(System.in);
		int i ;
		int count = 0;
		while(true){
			System.out.println("欢迎来到图书管理系统");
			System.out.println("1.添加图书信息");
			System.out.println("2.修改图书信息");
			System.out.println("3.删除图书");
//			System.out.println("4.查询");
			System.out.println("5.退出");
			int book = sca.nextInt();
			if(book == 1){
				System.out.println("添加图书");
				System.out.print("--输入图书编号");

				arr1[count] = sca.nextInt();

				System.out.print("--输入书籍名");
				arr2[count] = sca.next();
				System.out.print("--输入图书价格(单位元)");
				arr3[count] = sca.nextDouble();
				System.out.println("成功添加");
				count ++;
				for(int j = 0;j <count;j++){
					if(arr1[j]==0){
						break;
					}
					System.out.println("已经添加编码为："+arr1[j]+"  书籍名称名称为： "+arr2[j]+" 图书价格："+arr3[j]+"元");
				}
			}else if(book == 2){
				System.out.println("修改图书");
				System.out.print("选择要修改的图书编号：");
				int upId = sca.nextInt();
				for(int ii = 0; ii < arr1.length; ii ++) {//1ii=0 i<1 i++
					if(upId == arr1[ii]) {
					System.out.print("--输入图书名");
					arr2[ii] = sca.next();
					System.out.print("--输入图书价格");
					arr3[ii] = sca.nextDouble();
					System.out.println("成功修改");
					}
				}
				for(int j = 0;j <5;j++){
					if(arr1[j]==0){
						break;
					}
					System.out.println("修改后的图书是："+arr1[j]+"  图书名称为： "+arr2[j]+" 图书价格："+arr3[j]);
				}
				
			}else if(book == 3){
				System.out.println("删除图书");
				System.out.print("选择要删除的图书编号：");
				int upId = sca.nextInt();
				for(int k = 0;k < arr1.length;k ++) {
					if(upId == arr1[k]) {
						for(int g = k;g < arr1.length-1;g ++) {
							arr1[g] = arr1[g + 1];
						}
					}
				}
//				arr1[upId-1] = 0;
//				arr2[upId-1] = null;
//				arr3[upId-1] = 0.0;				
				for(int j = 0;j <5;j++){
					if(arr1[j]==0){
						break;
					}
				}
			}else if(book == 5){
				System.out.println("退出系统");
				return;
			}
		}
	}
}