使用文件处理的 C 中的银行帐户系统
本文重点介绍如何使用 C 语言和 C 中的文件处理创建银行账户系统。
方法：
让我们详细讨论该方法，涵盖所有功能及其详细解释-
- 在 main函数创建一个 Menu，并为该 Menu 创建不同的函数，这些函数将使用 switch case 语句调用。有四种不同的功能-
- account()-此函数用于创建一个新帐户。
- transfermoney()-该函数用于向账户转账
- checkbalance() -该函数用于检查账户余额。
- login()-此函数用于登录帐户。
- 首先，通过在创建帐户后调用 account()函数来创建我们用户的帐户，使用文件处理函数将所有数据存储到文件中。
- 然后用户可以将金额转移给其他用户，因为调用了 transfermoney()函数，并且为了检查帐户中的当前余额调用 checkbalance()函数。
文件处理的概念将用于存储用户的数据，然后从该特定文件中读取所有数据，将结构存储在文件中，因为它们易于写入和读取。
执行：
让我们看看程序每个模块的 C 实现，最后将所有模块合并在一起，创建一个完整的工作程序。
1. 创建一个银行账户-
获取用户的所有输入并为其创建一个结构以将数据存储在文件中。
// 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();
} 2. 转账-
获取我们要向其转账的另一个用户的用户名，并在文件中打开他的记录并将金额写入文件。
// 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 transfered
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 TRANSFERED..");
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("transfering 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 TRANSFERED....");
getch();
// Close the files
fclose(fp);
fclose(fm);
// Function to return
// to the home screen
display(usernamet);
} 3. 检查余额-
打开一个写入了所有转账记录的文件，一一读取，匹配函数传入的用户名，获取正确的转账记录。
// 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("TRANSCATION 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);
} 4.登录功能-
为了添加登录功能，我们打开文件并匹配用户在注册时提供的用户名，如果用户名正确且与我们文件中的记录匹配，则登录他。
// 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);
}
// Screen is shown 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();
}完整的程序-
以下是使用文件处理概念的银行系统的完整 C 程序 -
C
// C program to implement
// the above approach
#include
#include
#include
#include
#include
// 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-Naman kumar");
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 UESERNAME 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();
}
// Successfull 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 transfered
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 TRANSFERED..");
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("transfering 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 TRANSFERED....");
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("TRANSCATION 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();
} 输出
程序的输出
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