C語言模擬ATM機界面

雖然是滿屏的printf、printf、printf、printf、、、、、、尷尬

但是一個小項目做下來還是能學習到很多的，有很多小的問題，不是親自來敲一遍代碼，是不會發現的。他的框架，每一個小函數功能的實現，

很多函數之間的關系，之間參數的傳遞等等。都是需要考慮的問題。

記得某位C 大神說過，只有在親身實踐中才能學習到真正的東西。另有古人雲：鍵盤不敲爛，月薪不過萬。。。。。

凡事從小處着手，慢慢的接近大項目，才是正道。好了廢話不多說

先看頭文件吧，

#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

 

主函數：

#include "main.h"

int main()
{
    int account_temp,password_temp,slect_temp;
    int account = 123456;//賬戶  
    int password = 123456;//密碼  
    int balance = 1000;//余額  
    printf("welcome to use the ATM !\n\n");
    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\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 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;
}

 

小函數的實現：

#include"main.h"

//查詢賬戶余額  
int  check_balance(int balance)
{
    int b;
    b = balance;
    printf("your account balance is :%d $\n\n",b);
}


//取錢，輸入要取金額，金額不足，更新余額。 
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!\n");
    else printf("please keep your cash: %d $\n",drew_account);
    
    return deviation;    //返回余額    
}

//重置密碼，返回新密碼 
int reset_password(int password)
{
    int original,new_pass;
    while(1)
    {
        printf("please input the original password:\n");
        scanf("%d",&original);
        if(original==password)
            break;
        else 
        {
            printf("input error!!\n");
            continue;
        }
    }
    
    while(1)
    {
        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>100000&&new_pass<999999)
            {
                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");
} 

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

 

運行效果