C语言模拟ATM机界面

虽然是满屏的printf、printf、printf、printf、、、、、、尴尬

但是一个小项目做下来还是能学习到很多的，有很多小的问题，不是亲自来敲一遍代码，是不会发现的。他的框架，每一个小函数功能的实现，

很多函数之间的关系，之间参数的传递等等。都是需要考虑的问题。

记得某位C 大神说过，只有在亲身实践中才能学习到真正的东西。另有古人云：键盘不敲烂，月薪不过万。。。。。

凡事从小处着手，慢慢的接近大项目，才是正道。好了废话不多说

先看头文件吧，

#ifndef MAIN_H
#define MAIN_H

#include "stdio.h"
#include "math.h"

int  check_balance(int);
int  drewmoney(int);
int  reset_password(int);
void take_card();
int  save_money(int );


#endif

主函数：

#include "main.h"

int main()
{
    int account_temp,password_temp,slect_temp;
    int account = 123456;//账户  
    int password = 123456;//密码  
    int balance = 1000;//余额  
    printf("welcome to use the ATM !

");
    while(1)
    {
        printf("please input your account number :");
        scanf("%d",&account_temp);
        printf("please input your password :");
        scanf("%d",&password_temp);
        
        if (account_temp==account&&password_temp==password)
        {
            printf("your account balance is : %d

",balance);
            break;
        }
        else
        {
            printf("account or password error!!
");
            continue;
        }
    }
    
    do
    {    
        printf("**************
");
        printf("1.check the balance.
");
        printf("2.withdrew money.
");
        printf("3.reset password.
");
        printf("4.take card.
");
        printf("5.save money.
");
        printf("**************
");
        printf("
		 please Select the project you want to serve:
");
        scanf("%d",&slect_temp);
        
        switch(slect_temp)
        {
            case 1:
                check_balance(balance);
                break;
            case 2:
                balance = drewmoney(balance);
                break;
            case 3:
                password = reset_password(password);
                break;
            case 4:
                take_card();
                break;
            case 5:
                balance = save_money(balance);
                break;        
        }
    }while(slect_temp!=4);
    return 0;
}

小函数的实现：

#include"main.h"

//查询账户余额  
int  check_balance(int balance)
{
    int b;
    b = balance;
    printf("your account balance is :%d $

",b);
}


//取钱，输入要取金额，金额不足，更新余额。 
int drewmoney(int balance)
{
    int drew_account,deviation;
    printf("please input the account you want to  drew :");
    scanf("%d",&drew_account);
    deviation = balance - drew_account;
    if(deviation < 0)
        printf("your account balance is not enough!
");
    else printf("please keep your cash: %d $
",drew_account);
    
    return deviation;    //返回余额    
}

//重置密码，返回新密码 
int reset_password(int password)
{
    int original,new_pass;
    while(1)
    {
        printf("please input the original password:
");
        scanf("%d",&original);
        if(original==password)
            break;
        else 
        {
            printf("input error!!
");
            continue;
        }
    }
    
    while(1)
    {
        printf("please input your new password with Six digit number:
");
        scanf("%d",&password);
        printf("please input again:
");
        scanf("%d",&new_pass);
        if(password == new_pass)
        {
            if(new_pass>100000&&new_pass<999999)
            {
                printf("reset success!!

");
                break;
            }
            else
            {
                printf("input error!!
");
                continue;
            }
            
        }
        else
        {
            printf("input error --> not same!!
");
            continue;
        }
        
    }
    return password;
}


void take_card()
{
    printf("please take your card!!

");
} 

//存钱，返回新的余额 
int save_money(int balance)
{
    int save_account;
    printf("please input the save account:
");
    scanf("%d",&save_account);
    if(save_account<0)
        printf("sorry,no negative account!!
");
    else 
        printf("you have saved money %d $
",save_account);
    return balance+save_account;
}

运行效果