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An assingment of nust. ATM machine software using file handling in C++

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1. Our Modern ATM machine has the following Menu
      a. Create new account
              i. When user selects this option, ask for username and password. Create a new text file                            with his/her name. If user already exists then ask the user to enter another name.
      b. Cash Withdraw
              i. Ask the user the amount he/she wants to withdraw. Check his account if the user has                           that amount of money in his/her account. If the amount exceeds, a message should be                           display saying that please enter less amount.
      c. Cash Deposit
      d. Fill Cash in ATM
              i. Ask for amount and add in ATM machine.
      f. The menu should be displayed again after every action. E.g., After cash withdrawal ATM                   software should display the menu again instead of exiting.


#include<iostream>
#include<stdio.h>
#include<conio.h>


using namespace std;

void main(){
char a;

FILE *myFile;
char name[10];
char password[10];
char temp;
int id_no = 0;
int user_id = 0;

int all_bal[1000];

int acc_bal = 0;
int bal = 0;
int counter = 0;
bool vl = 0;
int char_matched = 0;

int atm_bal = 0;


while (true){
cout << "Select Option: "
<< endl << "1. Create New Account"
<< endl << "2. Withdraw Cash"
<< endl << "3. Cash Deposit"
<< endl << "4. Cash fill in atm"
<< endl << "5. Account Summary" << endl;

a = _getch();

system("cls");

switch (a){
case '1':

cout << "Enter Your Name: ";
cin >> name;

cout << "Enter Your Password: ";

do{
temp = _getch();
cout << "*";
password[counter] = temp;
counter++;
} while (temp != 13 && counter < 10);
counter--;
password[counter] = '\0';
counter = 0;

cout << endl;

cout << "Enter Opening balance:";
cin >> acc_bal;

if (acc_bal < 0){
acc_bal = 0;
}


vl = 0;

myFile = fopen("all_names.txt", "r");
if (myFile){

while (fscanf(myFile, "%c", &temp) == 1){
if (temp != '-'){
if (name[counter] == temp){
char_matched++;
counter++;
}else {
char_matched = 0;
counter = 0;
}
}
if (temp == '-'){
if (char_matched == strlen(name)){
vl = 1;
}

counter = 0;
char_matched = 0;
}
}

fclose(myFile);
counter = 0;
char_matched = 0;
}




if (vl == 0){
myFile = fopen("all_names.txt", "a");
fprintf(myFile, "%s", name);
fprintf(myFile, "%c", '-');
fclose(myFile);

myFile = fopen("all_passwords.txt", "a");
fprintf(myFile, "%s", password);
fprintf(myFile, "%c", '-');
fclose(myFile);

myFile = fopen("all_accounts.txt", "a");
fprintf(myFile, "%d", acc_bal);
fprintf(myFile, "%c", '\n');
fclose(myFile);

cout << "Account created succesfully" << endl;
}
else {
cout << "Name Already In Use............." << endl;
}


break;
case '2':

cout << "Enter Your Name: ";
cin >> name;


vl = 0;
counter = 0;
char_matched = 0;
myFile = fopen("all_names.txt", "r");
if (myFile){
while (fscanf(myFile, "%c", &temp) == 1){
if (temp != '-'){
if (name[counter] == temp){
char_matched++;
counter++;
}
else {
char_matched = 0;
counter = 0;
}
}
if (temp == '-'){
if (char_matched == strlen(name)){
vl = 1;
user_id = id_no;
}

id_no++;

counter = 0;
char_matched = 0;
}
}
fclose(myFile);
counter = 0;
char_matched = 0;
}
else {
cout << "account does not exists..." << endl;
}

if (vl == 0){
cout << "account does not exists..." << endl;
}
else {
cout << "Please enter your password" << endl;

do{
temp = _getch();
cout << "*";
password[counter] = temp;
counter++;
} while (temp != 13 && counter < 10);
counter--;
password[counter] = '\0';
counter = 0;
cout << endl;


vl = 0;
counter = 0;
char_matched = 0;
id_no = 0;
myFile = fopen("all_passwords.txt", "r");
if (myFile){
while (fscanf(myFile, "%c", &temp) == 1){
if (temp != '-' && id_no == user_id){
if (password[counter] == temp){
char_matched++;
counter++;
}
else {
char_matched = 0;
counter = 0;
}
}
if (temp == '-'){
if (char_matched == strlen(password)){
vl = 1;
}

id_no++;

counter = 0;
char_matched = 0;
}
}

fclose(myFile);
counter = 0;
char_matched = 0;
}

if (vl == 1){
cout << "ACESS GURANTED***" << endl
<< "Enter Amount to withdraw: ";

cin >> acc_bal;

vl = 0;
counter = 0;
myFile = fopen("all_accounts.txt", "r");
if (myFile){
while (counter <= user_id){
counter++;
fscanf(myFile, "%d", &bal);
}
myFile = fopen("atm_balance.txt", "r");

if (myFile){
fscanf(myFile, "%d", &atm_bal);
} else {
myFile = fopen("atm_balance.txt", "w");
fprintf(myFile, "%d", atm_bal);
}

fclose(myFile);

if(bal < acc_bal){
cout << "You  Have only: " << bal << "$" << endl;
} 
if(acc_bal > atm_bal && bal >= acc_bal) {
cout << "Machine Have only: " << atm_bal << "$" << endl;
}else if(acc_bal <= atm_bal && bal >= acc_bal){
myFile = fopen("all_accounts.txt", "r");
counter = 0;
while (fscanf(myFile, "%d", &all_bal[counter]) == 1){
counter++;
}
fclose(myFile);
all_bal[user_id] -= acc_bal;

myFile = fopen("all_accounts.txt", "w");
id_no = 0;
while (counter != 0){
fprintf(myFile, "%d", all_bal[id_no]);
fprintf(myFile, "%s", "\n");
counter--;
id_no++;
}

fclose(myFile);

atm_bal -= acc_bal;

myFile = fopen("atm_balance.txt", "w");
fprintf(myFile, "%d", atm_bal);
fclose(myFile);
cout << "Take your money. THankx.." << endl;
}

counter = 0;
char_matched = 0;
}
} else{
cout << "Acess Denied.." << endl;
} 



}
id_no = 0;
user_id = 0;
break;
case '3':
cout << "Enter Your Name: ";
cin >> name;


vl = 0;
counter = 0;
char_matched = 0;
myFile = fopen("all_names.txt", "r");
if (myFile){
while (fscanf(myFile, "%c", &temp) == 1){
if (temp != '-'){
if (name[counter] == temp){
char_matched++;
counter++;
}
else {
char_matched = 0;
counter = 0;
}
}
if (temp == '-'){
if (char_matched == strlen(name)){
vl = 1;
user_id = id_no;
}

id_no++;

counter = 0;
char_matched = 0;
}
}
fclose(myFile);
counter = 0;
char_matched = 0;
}
else {
cout << "account does not exists..." << endl;
}

if (vl == 0){
cout << "account does not exists..." << endl;
}
else {
cout << "Please enter your password" << endl;

do{
temp = _getch();
cout << "*";
password[counter] = temp;
counter++;
} while (temp != 13 && counter < 10);
counter--;
password[counter] = '\0';
counter = 0;
cout << endl;


vl = 0;
counter = 0;
char_matched = 0;
id_no = 0;
myFile = fopen("all_passwords.txt", "r");
if (myFile){
while (fscanf(myFile, "%c", &temp) == 1){
if (temp != '-' && id_no == user_id){
if (password[counter] == temp){
char_matched++;
counter++;
}
else {
char_matched = 0;
counter = 0;
}
}
if (temp == '-'){
if (char_matched == strlen(password)){
vl = 1;
}

id_no++;

counter = 0;
char_matched = 0;
}
}

fclose(myFile);
counter = 0;
char_matched = 0;
}

if (vl == 1){
cout << "ACESS GURANTED***" << endl
<< "Enter Amount to deposit: ";

cin >> acc_bal;

vl = 0;
counter = 0;
myFile = fopen("all_accounts.txt", "r");
if (myFile){
while (counter <= user_id){
counter++;
fscanf(myFile, "%d", &bal);
}
myFile = fopen("atm_balance.txt", "r");

if (myFile){
fscanf(myFile, "%d", &atm_bal);
} else {
myFile = fopen("atm_balance.txt", "w");
fprintf(myFile, "%d", atm_bal);
}

fclose(myFile);
if(acc_bal <0){
myFile = fopen("all_accounts.txt", "r");
counter = 0;
while (fscanf(myFile, "%d", &all_bal[counter]) == 1){
counter++;
}
fclose(myFile);
all_bal[user_id] += acc_bal;

myFile = fopen("all_accounts.txt", "w");
id_no = 0;
while (counter != 0){
fprintf(myFile, "%d", all_bal[id_no]);
fprintf(myFile, "%s", "\n");
counter--;
id_no++;
}

fclose(myFile);


cout << "CASH DEPOSITED. THankx.." << endl;
}

fclose(myFile);
counter = 0;
char_matched = 0;
}
} else{
cout << "Acess Denied.." << endl;
} 



}
id_no = 0;
user_id = 0;
break;
case '4':
cout << "Enter Amount to add: ";
cin >> bal;

myFile = fopen("atm_balance.txt", "r");

if (myFile){
fscanf(myFile, "%d", &atm_bal);
} else {
myFile = fopen("atm_balance.txt", "w");
fprintf(myFile, "%d", atm_bal);
}

fclose(myFile);

atm_bal += bal;

myFile = fopen("atm_balance.txt", "w");
fprintf(myFile, "%d", atm_bal);
fclose(myFile);

break;
default:
break;
}

cout << "Press any key to continue....";
_getch();
system("cls");
}
}

Thursday 29 January 2015
Posted by Unknown
0 Comments
Tag : , , , , , , , , , ,

An assignment of nust on pointer in C++. copying, concatinating and searching string using pointers

►
1.       Create a menu with following options
a.       Give Input
                                                               i.      Takes input from user and saves it in the first array
b.      Copy a string
                                                               i.      User will enter a string and it will be copied in both the arrays
c.       Concat string
                                                               i.      When concat string option is selected, concatenate the string in the first array to second array
d.      Search String
                                                               i.      Search first array for the string entered by the user and only print true/false if found/not found
e.      Display String
                                                               i.      Display the second array to user when this option is selected.
2.       For above options your program will have six functions in total including main.
3.       Create two character arrays of size 1000 in main function.
4.       Every time user selects an option pass both the arrays to functions in the form of pointers.
5.       Use pointers to traverse and manipulate the arrays.
6.       Create a temporary array inside any function is allowed.


   
//C++ program to copy cancatenate search and display string through pointers
#include<iostream>
#include<conio.h>


using namespace std;

const int array_size = 1000;

void input(char *a);
void copy(char *a, char *b);
void concat(char *a, char *b);
int search(char *a, char *b);
void display(char *a, char *b);

void main(){
char arr1[array_size];
char arr2[array_size];
char a;
int b = 0;

//initialinzing array
arr1[0] = '\0';
arr2[0] = '\0';
for (int i = 1; i < array_size; i++){
arr1[i] = '-';
arr2[i] = '-';
}

while (true){
cout << "Enter the respective key to perform function:" << endl << endl
<< "1.\tInput String." << endl
<< "2.\tCopy String." << endl
<< "3.\tConcat String." << endl
<< "4.\tSearch String." << endl
<< "5.\tDisplay String." << endl;

a = _getch();

system("cls");
switch (a)
{
case '1':
input(arr1);
break;
case '2':
copy(arr1, arr2);
break;
case '3':
concat(arr1, arr2);
break;
case '4':
b = search(arr1, arr2);
if(b == 0){
cout << arr1 <<" String not founded";
} else{
cout << arr1 << " founded " << b << " times.";
}
break;
case '5':
display(arr1, arr2);
break;
default:
system("cls");
cout << "Invalid Key" << endl;
break;
}


cout << "\n\nPress any key to continue.....";
_getch();
system("cls");
}
}

void input(char *a) {
cout << "Enter string:";
cin >> a;

cout << "Successfully Entered...";
}

void copy(char *a, char *b){
cout << "Copying string....";
while (*a != '\0'){//lastpoint of copiying string
if (*b == '-' || *b == '\0'){//last point of 2nd string or its empty slots
*b = *a; //copy value
a++; //move to next value
}
b++;

if (*a == '\0'){            //end of copying string
*b = '+';
b++;
*b = '\0';
}
}
}
void concat(char *a, char *b){
char *c = a;
cout << "Concatinating string....";
while (*c != '\0'){
if (*b == '-' || *b == '\0'){
*b = *c;
c++;
}
b++;

if (*c == '\0'){
*b = '+';
b++;
*b = '\0';
}

}

*a = '\0';

}
int search(char *a, char *b){
char *c = a;
int counter = 0;

cout << "Searching: " << c << endl << endl;

c= a;

while(*b != '\0'){

while(*b != '+'){
if(*c == *b){
c++;
b++;
} else{
c = a;
b++;
}
if(*c == '\0' && *b == '+'){
counter++;
}
}

b++;
c = a;
}

if(counter > 0){return counter;}

return 0;
}
void display(char *a, char *b){
cout << "String A: " << a << endl;
cout << "String B: " << b << endl;
}
Posted by Unknown
0 Comments
Tag : , , , , , , , , , , ,
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