java实现简单的控制台管理系统

旧城等待， 2022-01-16 01:49 287阅读 0赞

[2019独角兽企业重金招聘Python工程师标准>>> ][2019_Python_] ![hot3.png][]

import java.util.Scanner;
    
    public class ZhouEr {
    
    	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("=图书管理系统1.0=");
    			System.out.println("1.添加");
    			System.out.println("2.修改");
    			System.out.println("3.删除");
    			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("--输入图书名");
    				arr2[count] = sca.next();
    				System.out.print("--输入图书价格");
    				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("已经添加的是："+arr1[j]+arr2[j]+arr3[j]);
    				}
    			}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 ++) {
    					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("修改后的书库是："+arr1[j]+arr2[j]+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;
    					}
    					System.out.println("删除后的书库是："+arr1[j]+arr2[j]+arr3[j]);
    				}
    			}else if(book == 5){
    				System.out.println("退出系统");
    				return;
    			}
    		}
    	}
    }

转载于:https://my.oschina.net/finchxu/blog/3052676

[2019_Python_]: https://my.oschina.net/u/2663968/blog/3061697
[hot3.png]: /images/20220115/7a9031b327a64b3a8f593db276220de4.png