5.1概述
设计一个简单的模拟自动提款机ATM界面的程序，实现用户登录及取款等功能。
5.2 需求分析
模拟自动取款机ATN界面，有常用的功能。 主要功能包括：用户输入密码登录主界面、取款功能、取款后显示取款金额和剩余金额、推出功能等
5.3 设计思路
先要用户输入密码，密码不正确并输入次数小于三次将提示重新输入，否则退出界面；密码正确进入取款界面，执行取款功能，然后显示取款金额和剩余金额，最后退出程序。
5.4 程序
#include <iostream>
#include<stdio.h>
#include<stdlib.h>
using namespace std
;
int main()
{while(1)
{
char Key
,CMoney
;
int password1
=1,password
,i
=1,a
=1000;
do
{
system("cls");
printf("***************************\n");
printf("* please select key: *\n");
printf("* 1.password: *\n");
printf("* 2.get money: *\n");
printf("* 3. return: *\n");
printf("***************************\n");
Key
=getchar();
} while(Key
!='1'&&Key
!='2'&&Key
!='3');
switch(Key
)
{
case'1':
system("cls");
do
{
i
++;
printf("please input password ");
scanf("%d",&password
);
if(password
!=password1
)
{
if(i
>3)
{
printf("wrong!please any key to exit");
getchar();
exit(0);
}
else
puts("wrong,try again");
}
}while(password1
!=password
&&i
<=3);
case'2':
do
{
system("cls");
if(password
!=password1
)
{
printf("please logging in,please any key to continue...");
getchar();
break;
}
else
{
printf("*************\n");
printf("* please select: *\n");
printf("* 1.100: *\n");
printf("* 2.200: *\n");
printf("* 3.300: *\n");
printf("* 4.return *\n");
printf("*************\n");
CMoney
=getchar();
}
}while(CMoney
!='1'&&CMoney
!='2'&&CMoney
!='3');
switch(CMoney
)
{
case'1':
system("cls");
a
=a
-100;
printf("* your credit money is 100,thank you * \n");
printf("* the balance is %d \n",a
);
printf("please any key to return... \n");
printf("*************\n");
getchar();
break;
case'2':
system("cls");
a
=a
-200;
printf("* your credit money is 200,thank you * \n");
printf("* the balance is %d \n",a
);
printf("please any key to return... \n");
printf("*************\n");
getchar();
break;
case'3':
system("cls");
a
=a
-300;
printf("* your credit money is 300,thank you * \n");
printf("* the balance is %d \n",a
);
printf("please any key to return... \n");
printf("*************\n");
getchar();
break;
case'4':
break;
}
break;
case'3':
printf("*************\n");
printf("* thank you for your using: *\n");
printf("* goodbye *\n");
printf("*************\n");
getchar();
break;
}
break;
}
}
