JAVA基础经典数值运算代码75个

/** * 模拟ATM */ import java.util.Scanner; public class Atm { public static void main(String[] args) { isPass(); // 密码块 huanYin(); // 功能选择 } static void isPass() { // 密码块 Scanner sc = new Scanner(System.in); boolean isPass = false; int password = 123456; for (int i = 1; i <= 4 || isPass == true; i++) { System.out.println("————————————————————"); System.out.println(" 欢迎光临龙哥制造ATM机"); System.out.println("————————————————————"); System.out.println(" 请您输入密码"); System.out.println("————————————————————"); int passwordsr = sc.nextInt(); if (passwordsr == password) { isPass = true; break; } else if (i > 2) { System.out.println("您的密码错误！为了保护用户资金安全！"); System.out.println("现在暂时冻结您的账户！"); System.out.println("请持有效证件找龙哥解决！"); break; } else { System.out.println("您的密码错误！您还有：" + (3 - i) + " 次机会！"); } } } static void huanYin() { // 功能选择 Scanner sc = new Scanner(System.in); int yue = 56000; // 余额 int monye; // 交易金额 int select = 0; boolean exit = false; while (exit != true) { System.out.println("————————————————————"); System.out.println(" 欢迎光临龙哥制造ATM机"); System.out.println("————————————————————"); System.out.println(" 1、查询余额"); System.out.println(" 2、 存款"); System.out.println(" 3、 取款"); System.out.println(" 4、 退出"); System.out.println("————————————————————"); System.out.println(" 请选择功能(1——4)"); System.out.println("————————————————————"); select = sc.nextInt(); switch (select) { case 1: System.out.println("您的余额为：" + yue); System.out.println("————————————————————"); System.out.println("按任意键继续……"); try { System.in.read(); } catch (java.io.IOException e) { System.out.println(e.toString()); } break; case 2: System.out.println("请输入存入金额："); monye = sc.nextInt(); if (monye < 0) { System.out.println("钱有负数的吗？？瓜得很哦你！"); System.out.println("按任意键继续……"); try { System.in.read(); } catch (java.io.IOException e) { System.out.println(e.toString()); } break; } System.out.println("存款金额为：" + monye); yue += monye; System.out.println("您的余额为：" + yue); System.out.println("按任意键继续……"); try { System.in.read(); } catch (java.io.IOException e) { System.out.println(e.toString()); } break; case 3: System.out.println("请输入取款金额："); monye = sc.nextInt(); if (monye < 0) { System.out.println("你要倒贴钱吗？？瓜得很哦你！"); System.out.println("按任意键继续……"); try { System.in.read(); } catch (java.io.IOException e) { System.out.println(e.toString()); } break; } else if (monye > yue) { System.out.println("你有那么多钱吗？？瓜得很哦你！"); System.out.println("按任意键继续……"); try { System.in.read(); } catch (java.io.IOException e) { System.out.println(e.toString()); } break; } System.out.println("取款金额为：" + monye); yue -= monye; System.out.println("您的余额为：" + yue); System.out.println("按任意键继续……"); try { System.in.read(); } catch (java.io.IOException e) { System.out.println(e.toString()); } break; case 4: exit = true; break; default: System.out.println("您的选择有误，请重新选择！"); } } } }