1.设计一个模拟自动取款机ATM，有常用的功能
2.常用的功能有：用户输入密码登录界面；取款界面；取款后的取款金额以及剩余显示，退出功能等等
3.程序执行的命令包括：（1）输入正确密码进入主登录页面
（2）执行取款界面
（3）显示取款金额以及剩余金额
（4）退出系统界面
#define _CRT_SECURE_NO_WARNINGS 1#define _CRT_SECURE_NO_DEPRECATE 1#define _CRT_NONSTDC_NO_DEPRECATE 1#include <stdio.h>#include <stdlib.h>#include <conio.h>int main(){char key, Cmoney;//定义变量int password, zpassword = 123456;//定义密码与密码的正确值，默认正确密码为123456int i = 1;int a = 1000;//默认最初的金额为1000while (1){do{system("cls");//清屏printf("********************欢迎来到模拟ATM取款机**********************\n");printf("\n");printf(" **********Please select key(请选择)**************\n");printf("\n");printf(" **********1.Password（密码验证）***********\n");printf("\n");printf(" **********2.Get money（取款）***********\n");printf("\n");printf(" **********3.Return（退出）*************\n");printf("\n");printf("********************欢迎来到模拟ATM取款机**********************\n");key = getch();//key的值等于刚刚键盘录入的值} while (key != '1' && key != '2' && key != '3');//当输入的值不为1，2，3时，循环执行里面的语句switch (key){/***************************选择选项1*****************************/case '1'://当选择1时system("cls");//清屏do{i++;//记录输入密码的次数printf(" Please input your password:（输入密码） \n");scanf("%d", &password);if (zpassword != password)//如果密码输入不正确，则执行下面的语句{if (i > 3)//密码错误，且已经达到三次{printf("The password is wrong!Press any key to exit...（密码错误，请按任意键退出）");getch();exit(0);//退出程序}else//密码错误，但是未达到三次{puts("Please try again!（重新输入）");}}} while (zpassword != password);//密码输入正确，且输入次数小于等于3printf("OK.Please press any key to continue...（密码正确，请按任意键继续）");getch();/***************************选择选项2*****************************/case'2':do{system("cls");if (password != zpassword){printf("Please logging in,press any key to continue...（请使用密码登录）");getch();break;}else{printf("*********************************************\n");printf("\n");printf("Please select:（请选择取款金额）\n");printf("\n");printf(" 1.100$\n");printf("\n");printf(" 2.200$\n");printf("\n");printf(" 3.300$\n");printf("\n");printf(" 4.Return\n");printf("\n");printf("*********************************************\n");scanf("%d", &Cmoney);}} while (Cmoney!=1&& Cmoney != 2&&Cmoney != 3&& Cmoney != 4);if (Cmoney == 1){system("cls");a = a - 100;printf("************************************************\n");printf("\n");printf(" 您刚刚取走：100$\n");printf("\n");printf(" 剩下的钱：%d$\n", a);printf("\n");printf("************************************************\n");}else if (Cmoney == 2){system("cls");a = a - 200;printf("************************************************\n");printf("\n");printf(" 您刚刚取走：200$\n");printf("\n");printf(" 剩下的钱：%d$\n", a);printf("\n");printf("************************************************\n");}else if (Cmoney == 3){system("cls");a = a - 300;printf("************************************************\n");printf("\n");printf(" 您刚刚取走：300$\n");printf("\n");printf(" 剩下的钱：%d$\n", a);printf("\n");printf("************************************************\n");}else{break;}case '3':printf("\n");printf("\n");printf("\n");printf("*********************************************\n");printf("\n");printf(" Thank You ! \n");printf("\n");printf(" Goodbye !\n");printf("*********************************************\n");getch();break;}break;}}
