GAME: Bank account system

Approach of the Game

1. Create a Menu in the main function and create different functions for the Menu, which will be called using switch case statements. There are four different functions-

• account() - This function is used to create a new account.
• transfermoney()- This function is used to transfer money to the account
• checkbalance() - This function is used to check the balance in the account.
• login() - This function is used to login into the account.

1. First, create an account of our user by calling the account() function after the creation of an account, store all the data into a file using file handling functions.
2. Then the user is able to transfer the amount to other users, for that transfermoney() function is called, and for checking the current balance in the account call checkbalance() function.

// C program to implement
// the above approach
#include <conio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <windows.h>

// Declaring all the functions
void checkbalance(char*);
void transfermoney(void);
void display(char*);
void person(char*);
void login(void);
void loginsu(void);
void account(void);
void accountcreated(void);
void afterlogin(void);
void logout(void);

// Declaring gotoxy
// function for setting
// cursor position
void gotoxy(int x, int y)
{
	COORD c;
	c.X = x;
	c.Y = y;

	SetConsoleCursorPosition(
		GetStdHandle(STD_OUTPUT_HANDLE), c);
}

// Creating a structure to store
// data of the user
struct pass {
	char username[50];
	int date, month, year;
	char pnumber[15];
	char adharnum[20];
	char fname[20];
	char lname[20];
	char fathname[20];
	char mothname[20];
	char address[50];
	char typeaccount[20];
};

// Structure to keep track
// of amount transfer
struct money {
	char usernameto[50];
	char userpersonfrom[50];
	long int money1;
};

struct userpass {
	char password[50];
};

// Driver Code
int main()
{
	int i, a, b, choice;
	int passwordlength;

	gotoxy(20, 3);

	// Creating a Main
	// menu for the user
	printf("WELCOME TO BANK ACCOUNT SYSTEM\n\n");
	gotoxy(18, 5);

	printf("**********************************");
	gotoxy(25, 7);

	printf("DEVELOPER-YOUR NAME");

	gotoxy(20, 10);
	printf("1.... CREATE A BANK ACCOUNT");

	gotoxy(20, 12);
	printf("2.... ALREADY A USER? SIGN IN");
	gotoxy(20, 14);
	printf("3.... EXIT\n\n");

	printf("\n\nENTER YOUR CHOICE..");

	scanf("%d", &choice);

	switch (choice) {
	case 1:
		system("cls");
		printf("\n\n USERNAME 50 CHARACTERS MAX!!");
		printf("\n\n PASSWORD 50 CHARACTERS MAX!!");
		account();
		break;

	case 2:
		login();
		break;

	case 3:
		exit(0);
		break;

		getch();
	}
}

// Function to create accounts
// of users
void account(void)
{
	char password[20];
	int passwordlength, i, seek = 0;
	char ch;
	FILE *fp, *fu;
	struct pass u1;
	struct userpass p1;

	struct userpass u2;

	// Opening file to
	// write data of a user
	fp = fopen("username.txt", "ab");

	// Inputs
	system("cls");
	printf("\n\n!!!!!CREATE ACCOUNT!!!!!");

	printf("\n\nFIRST NAME..");
	scanf("%s", &u1.fname);

	printf("\n\n\nLAST NAME..");
	scanf("%s", &u1.lname);

	printf("\n\nFATHER's NAME..");
	scanf("%s", &u1.fathname);

	printf("\n\nMOTHER's NAME..");
	scanf("%s", &u1.mothname);

	printf("\n\nADDRESS..");
	scanf("%s", &u1.address);

	printf("\n\nACCOUNT TYPE");
	scanf("%s", &u1.typeaccount);

	printf("\n\nDATE OF BIRTH..");
	printf("\nDATE-");
	scanf("%d", &u1.date);
	printf("\nMONTH-");
	scanf("%d", &u1.month);
	printf("\nYEAR-");
	scanf("%d", &u1.year);

	printf("\n\nADHAR NUMBER");
	scanf("%s", u1.adharnum);

	printf("\n\nPHONE NUMBER");
	scanf("%s", u1.pnumber);

	printf("\n\nUSERNAME.. ");
	scanf("%s", &u1.username);

	printf("\n\nPASSWORD..");

	// Taking password in the form of
	// stars
	for (i = 0; i < 50; i++) {
		ch = getch();
		if (ch != 13) {
			password[i] = ch;
			ch = '*';
			printf("%c", ch);
		}
		else
			break;
	}

	// Writing to the file
	fwrite(&u1, sizeof(u1),
		1, fp);

	// Closing file
	fclose(fp);

	// Calling another function
	// after successful creation
	// of account
	accountcreated();
}

// Successful account creation
void accountcreated(void)
{
	int i;
	char ch;
	system("cls");
	printf(
		"PLEASE WAIT....\n\nYOUR DATA IS PROCESSING....");
	for (i = 0; i < 200000000; i++) {
		i++;
		i--;
	}

	gotoxy(30, 10);

	printf("ACCOUNT CREATED SUCCESSFULLY....");
	gotoxy(0, 20);

	printf("Press enter to login");

	getch();
	login();
}

// Login function to check
// the username of the user
void login(void)
{
	system("cls");

	char username[50];
	char password[50];

	int i, j, k;
	char ch;
	FILE *fp, *fu;
	struct pass u1;
	struct userpass u2;

	// Opening file of
	// user data
	fp = fopen("username.txt",
			"rb");

	if (fp == NULL) {
		printf("ERROR IN OPENING FILE");
	}
	gotoxy(34, 2);
	printf(" ACCOUNT LOGIN ");
	gotoxy(7, 5);
	printf("***********************************************"
		"********************************");

	gotoxy(35, 10);
	printf("==== LOG IN ====");

	// Take input
	gotoxy(35, 12);
	printf("USERNAME.. ");
	scanf("%s", &username);

	gotoxy(35, 14);
	printf("PASSWORD..");

	// Input the password
	for (i = 0; i < 50; i++) {
		ch = getch();
		if (ch != 13) {
			password[i] = ch;
			ch = '*';
			printf("%c", ch);
		}

		else
			break;
	}

	// Checking if username
	// exists in the file or not
	while (fread(&u1, sizeof(u1),
				1, fp)) {
		if (strcmp(username,
				u1.username)
			== 0) {
			loginsu();
			display(username);
		}
	}

	// Closing the file
	fclose(fp);
}

// Redirect after
// successful login
void loginsu(void)
{
	int i;
	FILE* fp;
	struct pass u1;
	system("cls");
	printf("Fetching account details.....\n");
	for (i = 0; i < 20000; i++) {
		i++;
		i--;
	}

	gotoxy(30, 10);
	printf("LOGIN SUCCESSFUL....");
	gotoxy(0, 20);
	printf("Press enter to continue");

	getch();
}

// Display function to show the
// data of the user on screen
void display(char username1[])
{
	system("cls");
	FILE* fp;
	int choice, i;
	fp = fopen("username.txt", "rb");
	struct pass u1;

	if (fp == NULL) {
		printf("error in opening file");
	}

	while (fread(&u1, sizeof(u1),
				1, fp)) {
		if (strcmp(username1,
				u1.username)
			== 0) {
			gotoxy(30, 1);
			printf("WELCOME, %s %s",
				u1.fname, u1.lname);
			gotoxy(28, 2);
			printf("..........................");
			gotoxy(55, 6);
			printf("==== YOUR ACCOUNT INFO ====");
			gotoxy(55, 8);
			printf("***************************");
			gotoxy(55, 10);
			printf("NAME..%s %s", u1.fname,
				u1.lname);

			gotoxy(55, 12);
			printf("FATHER's NAME..%s %s",
				u1.fathname,
				u1.lname);

			gotoxy(55, 14);
			printf("MOTHER's NAME..%s",
				u1.mothname);

			gotoxy(55, 16);
			printf("ADHAR CARD NUMBER..%s",
				u1.adharnum);

			gotoxy(55, 18);
			printf("MOBILE NUMBER..%s",
				u1.pnumber);

			gotoxy(55, 20);
			printf("DATE OF BIRTH.. %d-%d-%d",
				u1.date, u1.month, u1.year);

			gotoxy(55, 22);
			printf("ADDRESS..%s", u1.address);

			gotoxy(55, 24);
			printf("ACCOUNT TYPE..%s",
				u1.typeaccount);
		}
	}

	fclose(fp);

	gotoxy(0, 6);

	// Menu to perform different
	// actions by user
	printf(" HOME ");
	gotoxy(0, 7);
	printf("******");
	gotoxy(0, 9);
	printf(" 1....CHECK BALANCE");
	gotoxy(0, 11);
	printf(" 2....TRANSFER MONEY");
	gotoxy(0, 13);
	printf(" 3....LOG OUT\n\n");
	gotoxy(0, 15);
	printf(" 4....EXIT\n\n");

	printf(" ENTER YOUR CHOICES..");
	scanf("%d", &choice);

	switch (choice) {
	case 1:
		checkbalance(username1);
		break;

	case 2:
		transfermoney();
		break;

	case 3:
		logout();
		login();
		break;

	case 4:
		exit(0);
		break;
	}
}

// Function to transfer
// money from one user to
// another
void transfermoney(void)
{
	int i, j;
	FILE *fm, *fp;
	struct pass u1;
	struct money m1;
	char usernamet[20];
	char usernamep[20];
	system("cls");

	// Opening file in read mode to
	// read user's username
	fp = fopen("username.txt", "rb");

	// Creating a another file
	// to write amount along with
	// username to which amount
	// is going to be transferred
	fm = fopen("mon.txt", "ab");

	gotoxy(33, 4);
	printf("---- TRANSFER MONEY ----");
	gotoxy(33, 5);
	printf("========================");

	gotoxy(33, 11);
	printf("FROM (your username).. ");
	scanf("%s", &usernamet);

	gotoxy(33, 13);
	printf(" TO (username of person)..");
	scanf("%s", &usernamep);

	// Checking for username if it
	// is present in file or not
	while (fread(&u1, sizeof(u1),
				1, fp))

	{
		if (strcmp(usernamep,
				u1.username)
			== 0) {
			strcpy(m1.usernameto,
				u1.username);
			strcpy(m1.userpersonfrom,
				usernamet);
		}
	}
	gotoxy(33, 16);

	// Taking amount input
	printf("ENTER THE AMOUNT TO BE TRANSFERRED..");
	scanf("%d", &m1.money1);

	// Writing to the file
	fwrite(&m1, sizeof(m1),
		1, fm);

	gotoxy(0, 26);
	printf(
		"--------------------------------------------------"
		"--------------------------------------------");

	gotoxy(0, 28);
	printf(
		"--------------------------------------------------"
		"--------------------------------------------");

	gotoxy(0, 29);
	printf("transferring amount, Please wait..");

	gotoxy(10, 27);
	for (i = 0; i < 70; i++) {
		for (j = 0; j < 1200000; j++) {
			j++;
			j--;
		}
		printf("*");
	}

	gotoxy(33, 40);
	printf("AMOUNT SUCCESSFULLY TRANSFERRED....");
	getch();

	// Close the files
	fclose(fp);
	fclose(fm);

	// Function to return
	// to the home screen
	display(usernamet);
}

// Function to check balance
// in users account
void checkbalance(char username2[])
{
	system("cls");
	FILE* fm;
	struct money m1;
	char ch;
	int i = 1, summoney = 0;

	// Opening amount file record
	fm = fopen("mon.txt", "rb");

	int k = 5, l = 10;
	int m = 30, n = 10;
	int u = 60, v = 10;

	gotoxy(30, 2);
	printf("==== BALANCE DASHBOARD ====");
	gotoxy(30, 3);
	printf("***************************");
	gotoxy(k, l);
	printf("S no.");
	gotoxy(m, n);
	printf("TRANSACTION ID");
	gotoxy(u, v);
	printf("AMOUNT");

	// Reading username to
	// fetch the correct record
	while (fread(&m1, sizeof(m1),
				1, fm)) {
		if (strcmp(username2,
				m1.usernameto)
			== 0) {
			gotoxy(k, ++l);
			printf("%d", i);
			i++;
			gotoxy(m, ++n);
			printf("%s", m1.userpersonfrom);

			gotoxy(u, ++v);
			printf("%d", m1.money1);
			// Adding and
			// finding total money
			summoney = summoney + m1.money1;
		}
	}

	gotoxy(80, 10);
	printf("TOTAL AMOUNT");

	gotoxy(80, 12);
	printf("%d", summoney);

	getch();

	// Closing file after
	// reading it
	fclose(fm);
	display(username2);
}

// Logout function to bring
// user to the login screen
void logout(void)
{
	int i, j;
	system("cls");
	printf("please wait, logging out");

	for (i = 0; i < 10; i++) {
		for (j = 0; j < 25000000; j++) {
			i++;
			i--;
		}
		printf(".");
	}

	gotoxy(30, 10);
	printf("Sign out successfully..\n");

	gotoxy(0, 20);
	printf("press any key to continue..");

	getch();
}