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 = ;//账户
    int password = ;//密码
    int balance = ;//余额
    printf("welcome to use the ATM !\n\n");
    while()
    {
        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\n\n",balance);
            break;
        }
        else
        {
            printf("account or password error!!\n");
            continue;
        }
    }

    do
    {
        printf("**************\n");
        printf("1.check the balance.\n");
        printf("2.withdrew money.\n");
        printf("3.reset password.\n");
        printf("4.take card.\n");
        printf("5.save money.\n");
        printf("**************\n");
        printf("\n\t\t please Select the project you want to serve:\n");
        scanf("%d",&slect_temp);

        switch(slect_temp)
        {
            case :
                check_balance(balance);
                break;
            case :
                balance = drewmoney(balance);
                break;
            case :
                password = reset_password(password);
                break;
            case :
                take_card();
                break;
            case :
                balance = save_money(balance);
                break;
        }
    }while(slect_temp!=);
    return ;
}

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 $\n\n",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 < )
        printf("your account balance is not enough!\n");
    else printf("please keep your cash: %d $\n",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()
    {
        printf("please input the original password:\n");
        scanf("%d",&original);
        if(original==password)
            break;
        else
        {
            printf("input error!!\n");
            continue;
        }
    }

    while()
    {
        printf("please input your new password with Six digit number:\n");
        scanf("%d",&password);
        printf("please input again:\n");
        scanf("%d",&new_pass);
        if(password == new_pass)
        {
            if(new_pass>&&new_pass<)
            {
                printf("reset success!!\n\n");
                break;
            }
            else
            {
                printf("input error!!\n");
                continue;
            }

        }
        else
        {
            printf("input error --> not same!!\n");
            continue;
        }

    }
    return password;
}

void take_card()
{
    printf("please take your card!!\n\n");
} 

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

运行效果