一、课题要求1、当输入给定的卡号和密码（初始卡号和密码为123456）时，系统能登录A TM柜员机系统。

2、查询余额：初始余额为10000元。

3、ATM取款：每次取款金额为100的倍数，总额不超过5000元，支取金额不允许透支。

4、ATM存款：不能出现负存款。

5、修改密码：新密码长度不小于6位，不允许出现6位完全相同的情况，只有旧密码正确，新密码符合要求，且两次输入相同的情况下才可以成功修改密码。

二、代码#include "stdafx.h"#include "stdio.h"#include "windows.h"#include "stdlib.h"#include "conio.h"void gotoxy(int x,int y); //光标位置函数void enter_ATM(); //账号输入函数void input_code(); //密码输入函数void caozuo(); //基本操作界面void qukuan(); //取款函数void success(); //操作成功函数void delay(); //延时函数void yu_e(); //余额查询函数void cunkuan(); //存款函数void panduan(long int z); //判断取款是否合法函数void exit(); //退出界面函数void mima(); //密码修改void zhuangyi();long int CODE=123456,YU_E=10000;//=========================主函数========================//main(){enter_ATM();caozuo();}//======================================================////==================================柜台机账号输入函数=======================================//void enter_ATM(){system("cls");printf("********************************\n");printf("* *\n");printf("* 欢迎使用A TM 柜台机*\n");printf("* 请输入卡号*\n");printf("* *\n");printf("* 取消确定*\n");printf("* *\n");printf("********************************\n");long int user;gotoxy(14,4);scanf("%d",&user);while(user!=123456){system("cls");printf("********************************\n");printf("* *\n");printf("* 账户不存在，请从新输入*\n");printf("* *\n");printf("* *\n");printf("* 取消确定*\n");printf("* *\n");printf("********************************\n");gotoxy(13,3);scanf("%d",&user);}input_code();}//========================================================================= =================////=======================================密码输入函数========================================//void input_code(){long int code;int temp=3,time;system("cls");printf("********************************\n");printf("* *\n");printf("* 请输入密码*\n");printf("* *\n");printf("* *\n");printf("* 取消确定*\n");printf("* *\n");printf("********************************\n");gotoxy(14,3);scanf("%d",&code);while(code!=CODE){temp--;if(temp==0){for(time=5;time>0;time--){system("cls");printf("********************************\n");printf("* *\n");printf("* 您已经3 次输入密码*\n");printf("* 系统将退出操作*\n");printf("* *\n");printf("* ");printf("%d",time);printf(" *\n");printf("* *\n");printf("********************************\n");delay();}enter_ATM();}system("cls");printf("********************************\n");printf("* *\n");printf("* 密码错误，请重新输入*\n");printf("* 您还有");printf("%d",temp);printf(" 次机会*\n");printf("* *\n");printf("* 取消确定*\n");printf("* *\n");printf("********************************\n");gotoxy(14,4);scanf("%d",&code);}caozuo();}//========================================================================= ============////============================================主操作界面函数========================================//void caozuo(){system("cls");printf("********************************\n");printf("* 请选择一下业务*\n");printf("* 1.修改密码*\n");printf("* 2.查询余额*\n");printf("* 3.取款*\n");printf("* 4.实时存款*\n");printf("* 5.退出*\n");printf("********************************\n");switch(getch()){case '1': mima(); break;case '2': yu_e(); break;case '3': qukuan(); break;case '4': cunkuan(); break;case '5': exit(); break;default:printf("error\n");}}//========================================================================= =========================////==============================密码修改函数==============================// void mima(){long int mm1,mm2,mm3;char temp;system("cls");printf("********************************\n");printf("* *\n");printf("* 旧密码: *\n");printf("* *\n");printf("* 新密码: *\n");printf("* 确认新密码: *\n");printf("* *\n"); printf("********************************\n"); gotoxy(15,2);scanf("%d",&mm1);gotoxy(15,4);scanf("%d",&mm2);gotoxy(15,5);scanf("%d",&mm3);if(mm1!=CODE){system("cls");printf("********************************\n"); printf("* *\n"); printf("* 旧密码错误*\n"); printf("* *\n"); printf("* 请重新输入！*\n"); printf("* *\n"); printf("* *\n"); printf("********************************\n"); delay();delay();zhuangyi();}if(mm2!=mm3){system("cls");printf("********************************\n"); printf("* *\n"); printf("* 确认密码不一致*\n"); printf("* *\n"); printf("* 请重新输入！*\n"); printf("* *\n"); printf("* *\n"); printf("********************************\n"); delay();delay();zhuangyi();}if(mm2<100000){system("cls");printf("********************************\n"); printf("* *\n"); printf("* 密码必须大于或等于6位数*\n");printf("* *\n");printf("* 请重新输入！*\n");printf("* *\n");printf("* *\n");printf("********************************\n");delay();delay();zhuangyi();}temp=mm2%111111;if(temp==0){system("cls");printf("********************************\n");printf("* *\n");printf("* 密码过于简单*\n");printf("* *\n");printf("* 请重新输入！*\n");printf("* *\n");printf("* *\n");printf("********************************\n");delay();delay();zhuangyi();}CODE=mm2;system("cls");printf("********************************\n");printf("* *\n");printf("* 操作成功*\n");printf("* *\n");printf("* 1.返回 2.退出*\n");printf("* *\n");printf("* *\n");printf("********************************\n");switch(getch()){case '1': caozuo(); break;case '2': exit(); break;}}//======================================================================////==========================余额查询函数============================//void yu_e(){system("cls");printf("********************************\n");printf("* *\n");printf("* *\n");printf("* 系统正在查询*\n");printf("* 请稍候... *\n");printf("* *\n");printf("* *\n");printf("********************************\n");delay();delay();system("cls");printf("********************************\n");printf("* *\n");printf("* 您的余额为*\n");printf("* *\n");printf(" ");printf("%d",YU_E);printf("\n* *\n");printf("* 1.返回 2.退出*\n");printf("********************************\n");switch(getch()){case '1': caozuo(); break;case '2': exit(); break;}}//==================================================================////===================================取款函数====================================//void qukuan(){long int temp;system("cls");printf("********************************\n");printf("* 请选择您要取款的金额*\n");printf("* 1.100 2.200 *\n");printf("* 3.500 4.800 *\n");printf("* 5.1000 6.其它*\n");printf("* *\n");printf("* 7.返回8.退出*\n");printf("********************************\n");switch(getch()){case '1': panduan(100); break;case '2': panduan(200); break;case '3': panduan(500); break;case '4': panduan(800); break;case '5': panduan(1000); break;case '6':system("cls");printf("********************************\n");printf("* *\n");printf("* 请输入您要取款的金额*\n");printf("* *\n");printf("* *\n");printf("* *\n");printf("* *\n");printf("********************************\n");gotoxy(14,4);scanf("%d",&temp);panduan(temp); break;case '7':caozuo(); break;case '8':exit(); break;}}//========================================================================= =======////======================================判断取款是否合法函数==================================//void panduan(long int z){int beishu;if(z>YU_E){system("cls");printf("********************************\n");printf("* *\n");printf("* 余额不足！*\n");printf("* 请重新操作*\n");printf("* *\n"); printf("* 1.返回 2.退出*\n"); printf("* *\n"); printf("********************************\n"); switch(getch()){case '1': qukuan();case '2': exit();}}beishu=z%100;if(beishu!=0){system("cls");delay();printf("********************************\n"); printf("* *\n"); printf("* 本ATM机只支持100 的人民币*\n"); printf("* 请重新操作*\n"); printf("* *\n"); printf("* 1.返回 2.退出*\n"); printf("* *\n"); printf("********************************\n"); switch(getch()){case '1': qukuan();case '2': exit();}}if(z==5000||z>5000){system("cls");printf("********************************\n"); printf("* *\n"); printf("* 每次取款不能超过5000 元*\n"); printf("* 请重新操作*\n"); printf("* *\n"); printf("* 1.返回 2.退出*\n"); printf("* *\n"); printf("********************************\n"); switch(getch()){case '1': qukuan();case '2': exit();}}YU_E=YU_E-z;success();}//========================================================================= =================////==============================================存款函数=============================================//void cunkuan(){long int temp;system("cls");printf("********************************\n");printf("* *\n");printf("* 请放入人民币*\n");printf("* *\n");printf("* 取消确定*\n");printf("* *\n");printf("* *\n");printf("********************************\n");gotoxy(14,3);scanf("%d",&temp);while(temp<0){system("cls");printf("********************************\n");printf("* *\n");printf("* 非法存款*\n");printf("* 请重新放入人民币*\n");printf("* *\n");printf("* 取消确定*\n");printf("* *\n");printf("********************************\n");gotoxy(14,4);scanf("%d",&temp);}YU_E=YU_E+temp;success();}//========================================================================= ========================////===================================光标位置函数=========================================//void gotoxy(int x,int y){COORD coord;coord.X=x;coord.Y=y;SetConsoleCursorPosition( GetStdHandle( STD_OUTPUT_HANDLE ), coord );}//========================================================================= ==============////===========================================简答延时函数===========================================//void delay(){long int bl1;int bl2;for(bl1=655356;bl1>0;bl1--){for(bl2=410;bl2>0;bl2--);}}//========================================================================= ==========================////=======================操作成功函数===========================//void success(){system("cls");printf("********************************\n");printf("* *\n");printf("* *\n");printf("* 系统正在处理*\n");printf("* 请稍候... *\n");printf("* *\n");printf("* *\n");printf("********************************\n");delay();delay();system("cls");printf("********************************\n");printf("* *\n");printf("* 操作已成功*\n");printf("* *\n");printf("* 1.返回 2.退出*\n");printf("* *\n");printf("* *\n");printf("********************************\n");switch(getch()){case '1':caozuo(); break;case '2':exit(); break;}}//==============================================================////==========================系统退出函数===========================// void exit(){system("cls");printf("********************************\n");printf("* *\n");printf("* *\n");printf("* 欢迎您的再次使用*\n");printf("* 系统正在退出... *\n");printf("* *\n");printf("* *\n");printf("********************************\n");delay();delay();enter_ATM();}//================================================================////============== 简单转移函数=============//void zhuangyi(){mima();}//========================================//三、部分效果截图。