项目1_小鲨鱼记账系统

项目需求

记录收入支出情况以及剩余金额

项目代码

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        long money = 0;
        String explain = "";
        while(true){
            System.out.println("——————————欢迎来到小鲨鱼记账系统——————————");
            System.out.println("1.收支明细");
            System.out.println("2.登记收入");
            System.out.println("3.登记支出");
            System.out.println("4.退出系统");
            Scanner sc = new Scanner(System.in);
            System.out.println("———————————————————————————————————————");
            System.out.print("请选择数字:");
            int num = sc.nextInt();
            switch(num){
                case 1:
                    System.out.println("总金额为:"+money);
                    System.out.print("开支说明:");
                    System.out.println(explain);
                    System.out.print("输入任意数字回到菜单:");
                    long a = sc.nextLong();