A Simple C program to illustrate how a small bank program works

For some time I was working with my Dev C/ C++ compiler to make a C program that works like a small Bank Application. My affection with C language resulted in writing a small C program that shows how a Bank application can be made.
I know in many schools here in India mainly CBSE/ ICSE Syllabus, if you have Computer as a subject in class XI & XII you have to make projects in C++ language. Those Projects helps improving your understanding & sharpen you coding skills. Though this program is entirely written in C programming language which is not taught in class XI & XII, but still students can learn this language as C is the mother of all the modern programming languages (if you love coding as I do).

So now let's get right into the source code of the program.

/*  PROGRAM RUN & COMPILED ON DEV-C++ 5.11 COMPILER   */

#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
#include<string.h>
#include<time.h>
#include"bank.h" //function prototypes, Structure declarations declared on this header file.
void main()
{
int ch,choice,i,j;
char code[10];
FILE *fp,*fp1;
fp=fopen("account.dat","rb+");
fp1=fopen("register.dat","rb+");
if(fp==NULL)
{ fp=fopen("account.dat","wb+");
  if(fp==NULL)
    {   printf("\nError opening file !!!");
  exit(0);
}
    }
    if(fp1==NULL)
{ fp1=fopen("register.dat","wb+");
  if(fp1==NULL)
    {   printf("\nError opening file !!!");
  exit(0);
}
}
printf("\n");
}
FMENU: //Goto label for FMENU
printf("\n\n\n\n\n\t\t\t[1] ADMIN LOGIN/ SIGN-UP");
printf("\t\t[2] USER LOGIN/ SIGN-UP");
printf("\t\t[3]EXIT MENU");
printf("\n\n\nPlease enter your choice : ");
scanf("%d",&choice);
switch(choice)
{
case 1:
admin(fp1,"admin");
strcpy(code,"admin");
break;
case 2:
user(fp,"user");
strcpy(code,"user");
break;
case 3:
goto EXIT;
break;
default:
system("cls");
printf("\nPlease enter a valid option.");
goto FMENU;
}
do{
    if(strcmp(code,"admin")==0){
 do{
    system("cls");                                              // For clear screen, or you can use clrscr();
printf("\n\n\t******************************************************************************************\n");
printf("\n\t\t\t\t\t BANK ACCOUNT MENU PROGRAM \t\t\t\t\n");
printf("\n\t******************************************************************************************\n");
beg: //Goto label for beg
   printf("\n\n\n\n\t\t\t\t[1] - INSERT A NEW RECORD.");
printf("\n\t\t\t\t[2] - CHECK ACCOUNT.");
printf("\n\t\t\t\t[3] - DELETE RECORD.");
printf("\n\t\t\t\t[4] - LIST ALL RECORDS.");
printf("\n\t\t\t\t[5] - MODIFY RECORD.");
printf("\n\t\t\t\t[6] - LOAN OPERATIONS.");
printf("\n\t\t\t\t[7] - ABOUT PROGRAM.");
printf("\n\t\t\t\t[8] - EXIT MENU PROGRAM.\n\n");
printf("\n\n\tEnter your choice : ");
scanf("%d",&ch);
switch(ch)
{
case 1:
insert(fp,"user");
break;
case 2:
check(fp);
break;
case 3:
del(fp);
break;
case 4:
list(fp);
break;
case 5:
modify(fp);
break;
case 6:
loan(fp);
break;
case 7:
about();
break;
case 8:
{ fclose(fp);
 fclose(fp1); goto EXIT;
   break;    }
default:
system("cls");
printf("\nEnter a valid option between (1 or 8): \n\n");
goto beg;
        }
    }while(ch>=1 && ch<=7);
}
else {
do
{
system("cls");                                              // For clear screen, or you can use clrscr();
printf("\n\n\t******************************************************************************************\n");
printf("\n\t\t\t\t\t BANK ACCOUNT MENU PROGRAM \t\t\t\t\n");
printf("\n\t******************************************************************************************\n");
beg1:  // Goto label for beg1
    printf("\n\n\n\n\t\t\t\t[1] - CHECK ACCOUNT.");
printf("\n\t\t\t\t[2] - DELETE RECORD.");
printf("\n\t\t\t\t[3] - MODIFY RECORD.");
printf("\n\t\t\t\t[4] - WITHDRAW MONEY.");
printf("\n\t\t\t\t[5] - CREDIT MONEY.");
printf("\n\t\t\t\t[6] - VIEW LAST TRANSACTION.");
printf("\n\t\t\t\t[7] - LOAN OPERATIONS.");
printf("\n\t\t\t\t[8] - ABOUT PROGRAM.");
printf("\n\t\t\t\t[9] - EXIT MENU PROGRAM.\n\n");
printf("\n\n\tEnter your choice : ");
scanf("%d",&ch);
switch(ch)
{
case 1:
check(fp);
break;
case 2:
del(fp);
break;
case 3:
modify(fp);
break;
case 4:
withdraw(fp);
break;
case 5:
credit(fp);
break;
case 6:
trans(fp);
break;
case 7:
loan(fp);
break;
case 8:
   about();
   break;
case 9:
{ fclose(fp);
 fclose(fp1); goto EXIT;
   break;    }
default:
system("cls");
printf("\nEnter a valid option between (1 or 9): \n\n");
goto beg1;
        }
    }while(ch>=1 && ch<=8);
}
}while(-1);
EXIT:
system("cls");
printf("\n\n\n\n\t***************************************************************************************************************\n\n\n");
printf("\n\n\t\t\t\t END OF PROGRAM, THANKS FOR USING OUR BANK APPLICATION ... \t\t\t\t\n\n\n");
printf("\n\n\t***************************************************************************************************************\n");
}
void admin(FILE *fp1,const char *code)
{
 int choice;
 system("cls");
 printf("\n----------------------------------------------------------------------------------------------------------------------\n");
 printf("\n\n\t\t\t\t\tWELCOME TO ADMINISTRATOR ZONE ");
 printf("\n----------------------------------------------------------------------------------------------------------------------\n");
 beg:
 printf("\n\n\t\t\t\t[1] - LOGIN");
 printf("\n\t\t\t\t[2] - SIGNUP");
 printf("\n\t\t\t\t[3] - EXIT MENU");
 printf("\n\t\t\t\tEnter your choice : ");
 scanf("%d",&choice);
 switch(choice)
 {
  case 1:
  login(fp1,"admin");
  break;
  case 2:
  rewind(fp1);
while(fread(&regst,sizeof(regst),1,fp1)==1){
if(strcmp(code,regst.code)==0){
system("cls");
printf("\n\n\t\tYou can\'t signup as administrator because there is already an admin.");
goto beg;
}
}
reg(fp1,"admin");
  break;
  case 3:
  exit(0);
  break;
  default:
  system("cls");
  printf("\nEnter a valid option.");
  goto beg;
 }
 system("cls");
}
void user(FILE *fp1,const char *code)
{
 int choice;
 system("cls");
 printf("\n#####################################################################################################################\n");
 printf("\n\n\t\t\t\t\tWELCOME TO USER ZONE");
 printf("\n#####################################################################################################################\n");
 beg:
 printf("\n\n\t\t\t\t[1] - LOGIN");
 printf("\n\t\t\t\t[2] - SIGNUP");
 printf("\n\t\t\t\t[3] - EXIT MENU");
 printf("\n\t\t\t\tEnter your choice : ");
 scanf("%d",&choice);
 switch(choice)
 {
  case 1:
  login(fp1,"user");
  break;
  case 2:
  reg(fp1,"user");
  break;
  case 3:
  exit(0);
  break;
  default:
  system("cls");
  printf("\nEnter a valid option.");
  goto beg;
 }
 system("cls");
}
void reg(FILE *fp1,const char *code)
{
    int z=0; char name[50],save_opt;
    fseek(fp1,0,2);
    system("cls");
    printf("\n^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n");
    printf("\n\t\t\t\t\t\tWELCOME TO REGISTERISATION ZONE");
    printf("\n^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n");
printf("\n\n\tEnter your username : ");
    scanf("%s",name);
    if(search(fp1,name)==0){
printf("\n\n\tUsername already exists, please select other name.");
getch();
reg(fp1,code);
}
    else{
strcpy(regst.name,name); }
printf("\n\tEnter person address : ");
scanf("%s",regst.add);
printf("\n\tEnter person email : ");
scanf("%s",regst.mail);
printf("\n\tEnter person phone number : ");
scanf("%lld",&regst.phno);
printf("\n\tEnter person designation : ");
scanf("%s",regst.desg);
printf("\n\tEnter person password : ");
    while((c=getch())!=13)
        {
           regst.pswd[z++]=c;
           printf("%c",'*');
        } regst.pswd[z]='\0';
    printf("\n\tYour current balance is  0 Rs.");
    regst.bal=0;
    regst.amt=0;
    strcpy(regst.code,code);
    strcpy(regst.tcode,"\0");
    strcpy(regst.date,"\0");
    strcpy(regst.l_status,"UNACTIVE");
    regst.l_amt=0;
    printf("\n\tDo you want to save data to the file, Press Y to save Or anykey to cancel...");
    save_opt= getch();
    if(save_opt =='Y' || save_opt=='y')
{
fwrite(&regst,sizeof(regst),1,fp1);
printf("\n\n\t\tYou are successfully registered");
    printf("\n\n\t\tPress enter to try login your account.\n\n\t\t");
login(fp1,code);
}
else{
printf("\n\nRedirecting you to registration zone >>> ");
reg(fp1,code);
}
printf("\n\t\t\tPress anykey to continue...");
getch();
system("cls");
}
void login(FILE *fp1,const char *code)
{
    char name[50],pass[50],opt;
    int z=0,flag=1;
    system("cls");
    printf("\n***********************************************************************************************************************\n");
    printf("\n\t\t\t\t\t\tWELCOME TO LOG IN ZONE");
    printf("\n***********************************************************************************************************************\n");
    printf("\n\t\t\t\t\t\t\t\t\t\tYou\'re logging as %s.",code);
    printf("\n\n\t\t\t\tEnter your username : ");
    scanf("%s",name);
    if(search(fp1,name)==0){
    rewind(fp1);
while(fread(&regst,sizeof(regst),1,fp1)==1){
if(strcmp(code,regst.code)==0){
flag=0;
break;
}
}
if(flag==1){
printf("\n\t\tName not found in the file...");
goto VC;
}
printf("\n\n\t\t\t\tEnter your password : ");
    while((c=getch())!=13)
    {
        pass[z++]=c;
        printf("%c",'*');
    } pass[z]='\0';
}
if(serpswd(fp1,name,pass)==0){
    printf("\n\n\t\t\tYou\'ve successfully logged in...");
    }
else if(search(fp1,name)==1 || serpswd(fp1,name,pass)==1){
VC:
printf("\n\n\n\t\t\tUnsuccessful login attempt.");
printf("\n\n\t\t\tPress R to register Or anykey to retry login again...");
opt=getch();
if(opt=='r' || opt=='R'){
reg(fp1,code);
}
else{
login(fp1,code);
}
}
    printf("\n\t\t\tPress anykey to continue ...");
getch();
    system("cls");
}
void insert(FILE *fp,const char *code)
{
int z=0;
char save_opt,name[50];
fseek(fp,0,2);
system("cls");
printf("\n\n\n\n\tEnter person name : ");
scanf("%s",name);
if(search(fp,name)==0){
printf("\n\n\t\tUsername already exists, please select other name.");
getch();
insert(fp,code);
}
strcpy(regst.name,name);
printf("\n\tEnter person address : ");
scanf("%s",regst.add);
printf("\n\tEnter person email : ");
scanf("%s",regst.mail);
printf("\n\tEnter person phone number : ");
scanf("%lld",&regst.phno);
printf("\n\tEnter person designation : ");
scanf("%s",regst.desg);
printf("\n\tEnter person password : ");
    while((c=getch())!=13)
        {
           regst.pswd[z++]=c;
           printf("%c",'*');
        } regst.pswd[z]='\0';
    printf("\n\tYour current balance is  0 Rs.");
    regst.bal=0;
    regst.amt=0;
    strcpy(regst.tcode,"\0");
    strcpy(regst.code,code);
    strcpy(regst.date,"\0");
    strcpy(regst.l_status,"UNACTIVE");
    regst.l_amt=0;
printf("\n\n\tDo you want to save data to the file, Press Y to confirm or anykey to cancel...");
    save_opt=getch();
    if(save_opt=='Y' || save_opt=='y'){
fwrite(&regst,sizeof(regst),1,fp);
printf("\n\n\tData saved to the file...");
}
else
printf("\n\n\tData not saved to the file!!!");
printf("\n\n\tPress anykey to continue...");
getch();
system("cls");
}
void check(FILE *fp)
{
char name[50],psswd[50];
int z=0; char c;
system("cls");
printf("\n\n\n\tEnter your name : ");
scanf("%s",name);
if(search(fp,name)==0)
{
 printf("\n\tEnter your password : ");
 while((c=getch())!=13)
    {
           psswd[z++]=c;
           printf("%c",'*');
    } psswd[z]='\0';
if(serpswd(fp,name,psswd)==0)
{
printf("\n\n\tPerson name : %s.",regst.name);
printf("\n\tPerson address : %s.",regst.add);
printf("\n\tPerson mail : %s.",regst.mail);
printf("\n\tPerson phone number : %lld.",regst.phno);
printf("\n\tPerson designation : %s.",regst.desg);
printf("\n\tPerson balance : %lld Rs.",regst.bal+regst.l_amt);
printf("\n\tLoan status : %s",regst.l_status);
if(strcmp(regst.l_status,"ACTIVE")==0)
printf("\n\tLoan Amount : %lld",regst.l_amt);
}
else
{
printf("\n\n\tIncorrect Password for user....");
}
}
else
printf("\n\t\tName not found in the file...");
printf("\n\n\tPress anykey to continue...");
getch();
system("cls");
}
void del(FILE *fp)
{
FILE *fptmp;
int z=0;
char name[50],psswd[50];
system("cls");
printf("\n\n\n\tEnter the name of the person whose record is to be deleted from database : ");
scanf("%s",name);
if(search(fp,name)==0){
printf("\n\tEnter password of the person : ");
while((c=getch())!=13)
{
        psswd[z++]=c;
        printf("%c",'*');
} psswd[z]='\0';
if(serpswd(fp,name,psswd)==0){
fptmp=fopen("tempregst.dat","wb");
rewind(fp);
while(fread(&regst,sizeof(regst),1,fp)==1)
 {
if(strcmp(name,regst.name)!=0)
fwrite(&regst,sizeof(regst),1,fptmp);
 }
fclose(fp);
fclose(fptmp);
remove("account.dat");
rename("tempregst.dat","account.dat");
printf("\nRecord deleted...\n\n");
fp=fopen("account.dat","rb+");
}
else
printf("\n\n\tIncorrect Password for the user...");
}
else
printf("\n\n\tName not found in the file....");
printf("\n\n\tPress anykey to continue...");
getch();
system("cls");
}
int search(FILE *fp1,const char *name)
{
unsigned flag=1;
rewind(fp1);
while(fread(&regst,sizeof(regst),1,fp1)==1)
{  if(strcmp(name,regst.name)==0)
{
flag=0;
   break;
}
}
return flag;
}
int serpswd(FILE *fp,const char *name,const char *pswd)
{
unsigned flag=1;
rewind(fp);
while(fread(&regst,sizeof(regst),1,fp)==1)
{  if(strcmp(pswd,regst.pswd)==0 && strcmp(name,regst.name)==0)
{
flag=0;
   break;
}
}
return flag;
}
void list(FILE *fp)
{   int i=0;
rewind(fp);
system("cls");
printf("\n\n\n\n\tS.No\tName\t\tBalance\t\tEmail\t\t\tPhone No.\n\n");
while(fread(&regst,sizeof(regst),1,fp)==1)
{
   printf("\n\t%d.",i+1);
  printf("\t%s\t",regst.name);
printf("\tRs %lld",regst.bal);
printf("\t%s",regst.mail);
printf("\t%lld",regst.phno);
printf("\t%s\n",regst.l_status);
i++;
}
printf("\n\n\tPress anykey to continue...");
getch();
system("cls");
}
void modify(FILE *fp)
{
char name[50],psswd[50],cg;
int z=0;
long size=sizeof(regst);
system("cls");
printf("\n\n\n\tEnter the name of the person whose record is to be modified : ");
scanf("%s",name);
if(search(fp,name)==0)
{
printf("\n\tEnter your password : ");
        while((c=getch())!=13)
        {
           psswd[z++]=c;
           printf("%c",'*');
        } psswd[z]='\0';
        if(serpswd(fp,name,psswd)==0)
    {
printf("\n\n\n\t\tEnter new data -->>>\n");
printf("\t\tEnter - to not change the values ... \n\n");      //When values are not to be modified, User can enter '-' to make no changes in the given field.
    printf("\nEnter person name : ");
    if((cg=getch())!=45){
scanf("%s",regst.name);
   }
printf("\nEnter person address : ");
if((cg=getch())!=45)
{  scanf("%s",regst.add);
   }
printf("\nEnter person email : ");
if((cg=getch())!=45)
   { scanf("%s",regst.mail);
}
printf("\nEnter person phone number : ");
if((cg=getch())!=45)
{   scanf("%lld",&regst.phno);
}
printf("\nEnter person designation : ");
if((cg=getch())!=45)
{
scanf("%s",regst.desg);
}
printf("\nEnter person current balance : ");
if((cg=getch())!=45)
{   scanf("%lld",&regst.bal);
}
printf("\nEnter your new password : ");
if((cg=getch())!=45)
{
scanf("%s",regst.pswd);
       }
            fseek(fp,-size,1);
   fwrite(&regst,sizeof(regst),1,fp);
   printf("\n\n\t\tRecord modified sucessfully ...\n\n");
}
else
printf("\n\n\tIncorrect Password for the user...");
}
else
printf("\n\n\tName not found in the file...");
printf("\n\n\tPress anykey to continue...");
getch();
system("cls");
}
void withdraw(FILE *fp)
{
int z=0;
long size=sizeof(regst);
char name[50],psswd[50];
system("cls");
printf("\n\n\n\tEnter your name : ");
scanf("%s",name);
if(search(fp,name)==0)
{
 printf("\n\tEnter your password : ");
      while((c=getch())!=13)
        {
           psswd[z++]=c;
           printf("%c",'*');
        }psswd[z]='\0';
    if(serpswd(fp,name,psswd)==0)
    {
printf("\n\n\n\tEnter the amount you want to withdraw : ");
scanf("%lld",&regst.amt);
if(regst.amt>regst.bal)
{
 printf("\n\n\tInsufficent Balance to Withdraw!!!");
}
else
{   time_t t;
time(&t);
strcpy(regst.date,ctime(&t));
strcpy(regst.tcode,"DEBIT");
regst.bal-=regst.amt;
fseek(fp,-size,1);
fwrite(&regst,sizeof(regst),1,fp);
   printf("\n\n\tAmount successfully withdrawn....\n\n");
}
}
else
printf("\n\n\tIncorrect Password for the user...");
    }
else
printf("\n\n\tName not found in the file...");
printf("\n\n\tPress anykey to continue...");
getch();
system("cls");
}
void credit(FILE *fp)
{
long long amt; int z=0;
long size=sizeof(regst);
system("cls");
char name[50],psswd[50];
printf("\n\n\n\tEnter your name : ");
scanf("%s",name);
if(search(fp,name)==0)
{
 printf("\n\tEnter your password : ");
      while((c=getch())!=13)
        {
           psswd[z++]=c;
           printf("%c",'*');
        } psswd[z]='\0';
    if(serpswd(fp,name,psswd)==0)
    {
printf("\n\n\n\tEnter the amount you want to save to : ");
scanf("%lld",&regst.amt);
time_t t;
time(&t);
strcpy(regst.date,ctime(&t));
strcpy(regst.tcode,"CREDIT");
regst.bal+=regst.amt;
fseek(fp,-size,1);
fwrite(&regst,sizeof(regst),1,fp);
   printf("\n\n\tAmount successfully credited....\n\n");
}
else
printf("\n\n\tIncorrect Password for the user...");
}
else
printf("\n\n\tName not found in the file...");
printf("\n\n\tPress anykey to continue...");
getch();
system("cls");
}
void trans(FILE *fp)
{
    system("cls");
int i=1,z=0; char name[50],psswd[50];
rewind(fp);
printf("\n\n\n\n\t\tEnter your name : ");
scanf("%s",name);
if(search(fp,name)==0)
{
printf("\n\t\tEnter your password : ");
while((c=getch())!=13)
        {
           psswd[z++]=c;
           printf("%c",'*');
        }  psswd[z]='\0';
        if(serpswd(fp,name,psswd)==0)
        {
rewind(fp);
        while(fread(&regst,sizeof(regst),1,fp)==1)
        {
        if(strcmp(regst.name,name)==0)
{
         printf("\n\n\tName : %s",regst.name);
         printf("\tDate : %s ",regst.date);
         printf("\t%s",regst.tcode);
         printf("\t%lld",regst.amt);
         printf("\tCurrent Balance : %lld\n",regst.bal+regst.l_amt);
}
}
}
else
printf("\n\n\tIncorrect Password for the user...");
    }
    else
    printf("\n\n\tName not found in the file...");
printf("\n\n\tPress anykey to continue...");
getch();
system("cls");
}
void loan(FILE *fp)
{
char z,name[50],psswd[50];
long long amt;
long size=sizeof(regst);
int op;
system("cls");
printf("\n\n\tEnter the name : ");
scanf("%s",name);
if(search(fp,name)==0)
{
printf("\n\tEnter the password : ");
while((c=getch())!=13)
        {
           psswd[z++]=c;
           printf("%c",'*');
        }  psswd[z]='\0';
        if(serpswd(fp,name,psswd)==0)
        {
    system("cls");
         printf("\n\n\t\t[1] Apply for Loan.");
         printf("\n\t\t[2] Clear Previous Loan.");
         printf("\n\n\t\tEnter your choice : ");
         scanf("%d",&op);
         switch(op)
         {
          case 1:
{
if(strcmp(regst.l_status,"ACTIVE")==0)
            {
        printf("\n\n\t\tPlease clear your previous loan first.\n\n");
   }
   else
{
printf("\n\n\t\tEnter the amount of loan you wish to take : ");
scanf("%lld",&amt);
strcpy(regst.l_status,"ACTIVE");
regst.l_amt = amt;
fseek(fp,-size,1);
fwrite(&regst,sizeof(regst),1,fp);
}
}
break;
case 2:
{
if(strcmp(regst.l_status,"ACTIVE")==0)
          {
        printf("\n\t\tYour loan amount was %lld.",regst.l_amt);
        if(regst.bal<regst.l_amt)
        {
        printf("\n\t\tYou don\'t have sufficient balance to clear your due.\n");
}
else
{
regst.bal = regst.bal-regst.l_amt;
printf("\n\t\tThe loan amount has been recovered from your account.\n");
strcpy(regst.l_status,"UNACTIVE");
regst.l_amt=0;
fseek(fp,-size,1);
fwrite(&regst,sizeof(regst),1,fp);
}
}
else
{
printf("\n\n\t\tYou have no loan due pending.");
}
}
break;
default:
printf("\n\n\t\tInvalid choice...");
}
}
}
printf("\n\n\t\tPress anykey to continue...");
getch();
system("cls");
}
void about(void)
{
system("cls");
printf("\n\n\n\n\n\t\t\t\tPROGRAM TO DISPLAY HOW A TYPICAL BANK PROGRAM WORKS. ");
printf("\n\t\t\t\tPROGRAM DESIGNED & DEVELOPED BY AMIT SINGH...");
printf("\n\t\t\t\tSTUDENT OF SGRRITS, PATEL NAGAR, DEHRADUN, U.K, INDIA .");
printf("\n\t\t\t\tBCA Ist SEMESTER, AND A BEGINNER TO C/C++ LANGUAGE.");
printf("\n\t\t\t\tFOR ANY HELP VISIT AMIT\'S BLOG : http://www.asmitblog.blogspot.com/  ");
printf("\n\t\t\t\t\tOR KINDLY MAIL HIM AT : asamitdbz@gmail.com  ");
printf("\n\n\n\t\t\t\t\a***************************************************************\t\t\t\n\n\n");
printf("\n\n\tPress anykey to continue...");
getch();
system("cls");
}



This was the source code for the bank application. Below is the code for include file (#include"bank.h").

// bank.h -- structure templates and function prototypes
// structure templates
#ifndef BANK_H_
#define BANK_H_
struct reg{
char name[50],pswd[50];
char add[100],mail[50],desg[50];
long long phno,bal,amt,l_amt;
char code[10],tcode[7],date[100];
char l_status[10];
}regst;

void admin(FILE *fp1,const char *code); // function for admin (admin)
void user(FILE *fp1,const char *code); // function for user (user)
void reg(FILE *fp1,const char *code);                               // registration for new user
void login(FILE *fp1,const char *code);       // login for existing user
void insert(FILE *fp,const char *code); // function for inserting new record (admin)
void check(FILE *fp); // function for checking the reord of a user (user + admin)
void del(FILE *fp);  // function for deleting the record (user + admin)
int search(FILE *fp1,const char *name);       // serching name (user)
int serpswd(FILE *fp1,const char *name,const char *pswd); // searching password (user)
void list(FILE *fp);                               // lists all the user details (admin)
void modify(FILE *fp); // function for modifying a user record (user + admin)
void withdraw(FILE *fp); // function for withdrawing money (user)
void credit(FILE *fp);              // function for crediting money (user)
void trans(FILE *fp); // function to display last transaction of the account
void about(void);
void loan(FILE *fp); // function for providing loan

char c;

#endif

Save this file as bank.h.

Note : If your want this application to work in Turbo C++ , you may have to make some changes in the app. Such as if you want to clear console input, in Turbo C++ compiler you used clrscr(); defined in conio.h library file, but in Dev compiler you have to use system("cls");

Also copy the source code as it is. If you find any problem please comment below.

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