C语言 实现ATM系统

标签：c

主要用到了指针、结构体、数组、链表、文件读取

由于平时用java，所以感觉自己的代码还是可以看看的，尽量用面向对象的思想去写,这也使得原本近千行代码的程序只用了不到一半的代码完成。

User.h  //用户对象

struct User
{
	char UserAccount[100];
	char UserPassword[100];
	int Money;
	struct User *next;
};

UI.h //就是一个简单的菜单显示 

int showMenu(char MenuItem[][20], int itemCount){
	system("cls");
	for (int i = 0; i < 10;i++){
		printf("\n");
	}
	printf("***************************************************\n");
	for (int i = 0; i < itemCount; i++){
		printf("*               ");
		printf("%d.", i+1);
		int Str_size = 20;
		for (int j = 0; j < 10; j++){
			if (MenuItem[i][j] != '\0'){
				putchar(MenuItem[i][j]);
			}
			else{
				putchar(' ');
			}
		}
		printf("                      *\n");
	}
	printf("***************************************************");
	return 0;
}

void writeIntoFIle(FILE *fp, char path[]){
	fopen_s(&fp, path, "w+");
	struct User *temp = (struct User *)malloc(sizeof(struct User));
	temp = head;
	for (int i = 0; i < 5; i++){
		//	printf("%s %s %d\n", temp->UserAccount, temp->UserPassword, temp->Money);
		fprintf(fp, "%s %s %d\n", temp->UserAccount, temp->UserPassword, temp->Money);
		if (temp->next != NULL)
			temp = temp->next;
	}

}


void initFile(FILE *fp, char path[]){
	//fopen_s(&fp, path, "w+");
	if (feof(fp)){
		fprintf(fp, "%s %s %d\n", "6210300022352323", "123123", 10000);
		fprintf(fp, "%s %s %d\n", "6210300022352527", "132132", 1000000);
		fprintf(fp, "%s %s %d\n", "6210303002352323", "123123", 10000);
		fprintf(fp, "%s %s %d\n", "6210300202235233", "123123", 10000);
		fprintf(fp, "%s %s %d\n", "6213002323523233", "123123", 10000);
	}
	//	fclose(fp);
}
void initdata(FILE *fp, char path[]){
	/*printf("%d", fopen_s(&fp, path, "r+"));
	printf("%d", fopen_s(&fp, path, "r+"));
	printf("%d",fgetc(fp)==EOF);*/
	if (fopen_s(&fp, path, "r+") == 0 && fgetc(fp) == EOF){
		initFile(fp, path);
	}
	rewind(fp);
	struct User *user;
	Current_user = user = (struct User *)malloc(sizeof(struct User));
	char temp[100];
	//_getch();
	while (fscanf_s(fp, "%s", &user->UserAccount, 100) != EOF){
		fscanf_s(fp, "%s", &user->UserPassword, 100);
		fscanf_s(fp, "%d\n", &user->Money, 100);
		struct User *nextuser;
		nextuser = (struct User *)malloc(sizeof(struct User));
		printf("%s %s %d\n", user->UserAccount, user->UserPassword, user->Money);
		if (head == NULL)
			head = user;
		user->next = nextuser;
		user = nextuser;

	}
	fclose(fp);
}

bool checkAccount(char account[],struct User *u){

	struct User *temp = (struct User *)malloc(sizeof(struct User));
	struct User *headCopy = (struct User *)malloc(sizeof(struct User));
	temp = head;
	*headCopy =* head;
	while (temp != NULL){
		bool isExist = true;
		/*printf("first%s %d\n", head->UserAccount, head->Money);
		printf("temp%s %d\n", temp->UserAccount, temp->Money);*/
		for (int i = 0; i < 16; i++)
		{	
			if (account[i]!=temp->UserAccount[i])
			{
				isExist = false;
				break;
			}
		} 
		if (isExist)
		{ 
			u=temp;
			Current_user = u;
	       //*head =* headCopy;
		/*	printf("findout%s\n",u->UserAccount);
			printf("afterchange%s %s\n", Current_user->UserAccount, head->UserAccount);
			printf("headcopy%s %s\n", headCopy->UserAccount, headCopy->UserPassword);
			_getch();*/
			return true;
		}
		temp = (temp->next);
	}
	

	return false;
}
bool checkPassword(char Userpwd[], char Inputpwd[]){
	for (int i = 0; i<6; i++){
		if (Userpwd[i] != Inputpwd[i]){
			return false;
		}
	}
	return true;
}
void showAccount(char account[]){
	int length = strlen(account);
	if (length>16)
		length=16;
	for (int i = 0; i < length; i++){
		putchar(account[i]);
		if ((i+1) % 4 == 0&&i!=0){
			putchar(' ');
		}
	}
}
void showPassword(int length){
	if (length>6)
		length = 6;
	for (int i = 0; i < length; i++){
		_putch('*');
	}

}
void InputAccount(char UserAccount[]){
	int i = 0;
	system("cls");
	printf("请输入用户名：");
	while ((UserAccount[i] = _getch()) != '\r'&&i<16){
		if (UserAccount[i] == 8&&i>0){
			UserAccount[i] = '\0';
			UserAccount[i-1] = '\0';
			i--;
		}
		else if (UserAccount[i] >= '0' && UserAccount[i] <= '9'){
			if (i <= 15)
				i++;
		}
		system("cls");
		printf("请输入用户名：");
		showAccount(UserAccount);
	}
}
void InputPassword(char account[],char pwd[]){
	int i = 0;
	system("cls");
	printf("用户名：");
	showAccount(account);
	printf("\n请输入密码：");
	while ((pwd[i] = _getch()) != '\r'){
	 	if (pwd[i] == 8){
			pwd[i] = '\0';
			pwd[i - 1] = '\0';
			i--;
		}
		else if (pwd[i] >= '0' && pwd[i] <= '9'){
			if (i <= 5) 
				i++;
		}
		system("cls");
		printf("用户名：");
		showAccount(account);
		printf("\n请输入密码：");
		showPassword(strlen(pwd));
	}
}
void WithDraw(int Count){
	if (Count > Current_user->Money){
		printf("取款金额超出存款");
		return;
	}
	else {
		system("cls");
		printf("取款金额%d\n按任意键返回上一菜单",Count);

		Current_user->Money -= Count;
	}
}
void Deposit(int Count){
		system("cls");
		printf("存款金额%d\n按任意键返回上一菜单", Count);
		Current_user->Money += Count;
	
}

Main.cpp

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <conio.h>
struct User *head, *Current_user;
#include "User.h"
#include "UI.h"
#include "AccountController.h"
#include "FileController.h"

int InputMoney(){
	int result = 100;
	char inputItem = '\0';
	int i = 0;
	system("cls");
	printf("输入金额：");
	while ((inputItem = _getch()) != '\r'){
		system("cls");
		printf("输入金额：");
		if (inputItem >= '0'&&inputItem <= '9'){
			if (result != 100){
				result *= 10;
				result += (inputItem - 48) * 100;
			}
			else {
				result = (inputItem - 48) * 100;
			}
		}
		if (result > 5000){
			printf("取款限额为5000");
			result = 0;
		}
		printf("\n%d", result);
	}
	return result;
}

int SelectMoney(){
	int result = 100;
	char inputItem = '\0';
	char MoneyItem[][20] = { "100", "200", "500", "1000", "输入金额" };
	showMenu(MoneyItem, 5);
	while ((inputItem = _getch()) >='1'&&inputItem<='5')
	{	
		switch (inputItem)
		{
		case '1':
			return 100;
			break;
		case '2':
			return 200;
			break;
		case '3':
			return 500;
			break;
		case '4':
			return 1000;
			break;
		case '5':
			return InputMoney();
			break;
		default:
			printf("请输入正确选项\n");
		}
		
	}


}


bool OperationMenu(){
	char input_seletor = '\0';
	int Money = 0;
	struct User *temp = (struct User *)malloc(sizeof(struct User));
	char newPassword[7] = { '\0' };
	char confirmpassword[7] = { '\0' };
	char LoginMenu[][20] = { "取款", "存款", "查询余额", "修改密码" ,"退卡"};
	showMenu(LoginMenu, 5);
	while ((input_seletor = _getch()) >= '1'&&input_seletor <= '5')
	{
		switch (input_seletor)
		{
		case '1':
			Money = SelectMoney();
			WithDraw(Money);
			break;
		case '2':
			Money = SelectMoney();
			Deposit(Money);
			break;
		case '3':
			system("cls");
			printf("当前余额：%d\n按任意键返回", Current_user->Money);
			break;
		case '4':
			system("cls");
			InputPassword(Current_user->UserAccount, newPassword);
			system("cls");
			printf("再次输入以确认密码\n,按任意键继续输入");
			_getch();
			InputPassword(Current_user->UserAccount, confirmpassword);
			if (checkPassword(newPassword, confirmpassword)){
				for (int i = 0; Current_user->UserPassword[i] != '\0';i++){
					Current_user->UserPassword[i] = newPassword[i];
				}
				printf("%s  %s ",newPassword,confirmpassword);
				printf("\n密码修改成功！");
			}
			else{
				system("cls");
				printf("两次密码输入不一致");
			}
			break;
		case '5':
			return true;
			break;
		default:
			break;
		}
		_getch();
		break;
	}
	OperationMenu();
}
void startATM(){
	FILE *fp = NULL;
	char path[] = "C:\\Users\\user\\Desktop\\Account.txt";
	initdata(fp, path);//初始化数据
	int Islogin = 0;
	char input_seletor = '\0';
	char UserAccount[100] = { '\0' };
	char UserPwd[100] = { '\0' };
	char InputPwd[100] = { '\0' };
	InputAccount(UserAccount);
	//strcpy_s(UserAccount, "6210300022352527");
	if (checkAccount(UserAccount, Current_user)){
		while (Islogin<=2){
			InputPassword(UserAccount, InputPwd);
			//strcpy_s(InputPwd, "132132");
			if (checkPassword(Current_user->UserPassword, InputPwd)){
				printf("login successful\n");
				if (OperationMenu()){
					break;
				}
				Islogin = 0;
			}
			else{
				Islogin++;
				printf("password error");
			}
		}
		if (Islogin >= 2){
			system("cls");
			printf("密码三次输入错误，吞卡\n");
		}
		else{
			writeIntoFIle(fp,path);
			system("cls");
			printf("数据保存成功");
		}
	}
	_getch();
}
int main(){
	startATM();
	return 0;
}

C语言 实现ATM系统

标签：c

原文地址：http://blog.csdn.net/lingchixin/article/details/41733107