I tried to build a Social Media type program in CLI using C++ in Visual Studio.
I came across a problem where I need an attribute from base class (USN) which has some value set in Auth::login() and I can't access it in any other class. There is no ambiguity,inheritance does not work here for me, what is the actual problem?
classes.cpp
#include<iostream>
#include <Windows.h>
#include<conio.h>
#include<string>
#include<cstring>
#include <cstdio>
#include "queries.cpp"
#define clr cout<<"\033[2J\033[1;1H" // to clear the screen
using namespace std;
class User {
public:
string first_name;
string last_name;
string USN; // this is the variable i need and this variable becomes empty when accessed from a different class other than Auth()
string Deptt;
string username;
string gender;
string _dob;
string email;
string password;
string re_password;
string password_enc;
User() {};
virtual void setUSN(); // i created this method so that the USN would store in the class itself,, tried cin>>USN also but that didnt work
string getUSN();
};
class Auth :public User
{
public:
Auth() {};
void login(); // in login and signup i read USN from the user and it works only in the scope of Auth class;
void signup();
void enterPass1();
void enterPass2();
string encryptString(string S);
};
class HomePage:public User{
public:
int choice;
HomePage() {};
void BuildLayout();
};
class ProfileHandler : public HomePage{
public:
ProfileHandler() {}; /// for eg i tried to access the USN in this class (cout<<"usn: "<<USN;) that resulted in "usn: " only it didnt print the USN which was stored in the Auth class
void viewProfile();
//defined in reference.cpp
};
class Comment :public HomePage {
public:
Comment() {};
string comment_by;
string comment_on;
string comment_body;
};
class Post : public HomePage {
public:
string posted_by;
string post_title;
string post_body;
string posted_on;
int likes_count;
Post() {}
};
class MessageHandler {
public:
MessageHandler() {};
};
The methods are defined in this code:
#pragma
#include "classes.cpp"
#include "dope_cpp.cpp" // this is a custom header file for adding colours and ascii graphics to the code
void User::setUSN()
{
cin >> USN;
}
string User::getUSN()
{
return USN;
}
void Auth::login()
{
Decor().green_black();
cout << "\t\t\t\t login \n\n";
char usn_str[] = " \n\t\t\tUSN : ";
char pwd_str[] = " \t\t\tPassword: ";
//string user;
//char password[16];
//string password_enc = "";
//string re_password;
int p = 0;
//cout << "\t\t\t\t\t\tLogin Page" << endl<<endl<<endl;
Decor().d_lblue_black(usn_str);
Decor().lblue();
cout << " ";
setUSN();
string &usn = USN;
cout << endl;
Decor().d_lblue_black(pwd_str);
cout << " ";
Decor().lblue();
enterPass1();
Decor().reset();
password_enc = "";
password_enc = encryptString(password);
cout << endl << endl;
cout << "---->" << USN;// here USN prints
if (Queries().isAuthenticated(USN, password_enc) == true)
{
clr;
Decor().yellow();
cout << endl << endl << "Redirecting to Homepage...\n";
Sleep(2000);
HomePage().BuildLayout();
}
else {
int choice;
Decor().red();
cout << endl << "\t\t\tUsername and /or Password does not match" << endl;
Decor().purple();
cout << "\t\t\tDo you want to:\n\t\t\t1.Signup for an Account\n\t\t\t2.Re-enter the credentials\n\t\t\t3.Exit\n";
Decor().lblue();
cin >> choice;
Decor().reset();
switch (choice)
{
case 1:
clr;
Decor().yellow();
cout << "Redirecting to Signup...\n";
Sleep(1000);
signup();
break;
case 2:
clr;
Decor().kle_logo();
login();
break;
case 3:
clr;
exit(0);
default:
Decor().red();
cout << "Invalid Choice" << endl;
Decor().reset();
break;
}
}
}
string Auth::encryptString(string S)
{
string result = "";
for (int i = 0; i < S.length(); i++)
{
int temp = S[i];
result += to_string(temp);
}
return result;
}
void Auth::enterPass1()
{
char ch;
string pass;
ch = _getch();
while (ch != '\r') {
pass.push_back(ch);
cout << '*';
ch = _getch();
}
password = pass;
}
void Auth::enterPass2()
{
char ch;
string pass;
ch = _getch();
while (ch != '\r') {//character 13 is enter
pass.push_back(ch);
cout << '*';
ch = _getch();
}
re_password = pass;
}
void Auth::signup()
{
clr;
Decor().kle_logo();
string month;
string year;
string day;
char first_n_str[] = "\n\t\t\tEnter your First name : ";
char last_n_str[] = "\n\t\t\tEnter your last name : ";
char email_str[] = "\n\t\t\tEnter your email : ";
char USN_str[] = "\n\t\t\tEnter your USN : ";
char birth_date_str[] = "\n\t\t\tEnter your birthdate:";
char birth_year_str[] = "\n\t\t\tEnter the year of your birth(YYYY): ";
char birth_month_str[] = "\n\t\t\tEnter the month of your birthdate(MM): ";
char birth_day_str[] = "\n\t\t\tEnter the day of your birth(DD): ";
char dept_str[] = "\n\t\t\tEnter your respective department: ";
char gender_str[] = "\n\t\t\tEnter your gender(Male/Female/Other): ";
char pass_str[] = "\n\t\t\tChoose password(upto 16 characters): ";
char pass_re_str[] = "\n\t\t\tEnter password again: ";
Decor().green_black();
cout << "\t\t\tNice choice!\n\n";
cout << "\t\t\tSo, let's get you an account\n";
int p = 0;
bool at_found = false;
start:
// first name
Decor().reset();
Decor().blue();
cout << first_n_str;
cin >> first_name;
cout << endl;
if (first_name != " ")
{
Decor().blue();
cout << last_n_str;
cin >> last_name;
if (last_name != " ")
{
cout << endl;
email:
Decor().blue();
cout << email_str;
cin >> email;
for (int i = 0; i < email.size(); i++) ///todo;;;;;;
{
if (email[i] == '@')
{
at_found = true;
goto usn;
}
}
at_found = false;
if (at_found == true)
{
goto usn;
}
else
Decor().red();
cout << endl << "\n\t\t\tThere is no '@' in your email, please check and try again... " << endl;
Decor().reset();
goto email;
usn:
Decor().blue();
cout << USN_str;
Decor().reset();
cin >> USN;
if (USN.length() == 12)
{
username = USN;
cout << endl;
Decor().reset();
Decor().blue();
cout << birth_date_str;
cout << "\n";
Decor().green();
cout << birth_year_str;
Decor().reset();
cin >> year;
Decor().green();
cout << birth_month_str;
Decor().reset();
cin >> month;
Decor().green();
cout << birth_day_str;
Decor().reset();
cin >> day;
_dob = year + "-" + month + "-" + day;
cout << endl;
Decor().blue();
cout << dept_str;
Decor().reset();
cin >> Deptt;
Decor().blue();
cout << gender_str;
Decor().reset();
cin >> gender;
pswd:
Decor().yellow();
cout << pass_str;
Decor().reset();
enterPass1();
Decor().yellow();
cout << pass_re_str;
Decor().reset();
enterPass2();
if (password.compare(re_password) != 0)
{
Decor().red();
cout << "\n\n\t\t\tPassword mismatch....\n\t\t\tRe-Enter the passwords\n";
Decor().reset();
goto pswd;
}
if (password.length() < 8)
{
Decor().red();
cout << "\n\t\t\tPassword must be atleast 8 characters long" << endl;
Decor().reset();
goto pswd;
}
else if (password.length() > 16)
{
Decor().yellow();
cout << "Password character limit is 16, you have entered more than that\n";
cout << "Choose password again\n";
Decor().reset();
goto pswd;
}
password_enc = encryptString(password);
}
else if (USN.length() != 12) {
Decor().red();
cout << "\nUSN must be of 12 characters\nSee your Id card for USN\n\nStart again\n";
cout << endl << endl;
Decor().reset();
goto start;
}
}
else goto start;
}
else goto start;
Decor().green();
cout << "\n\t\t\tGreat!\n";
Decor().reset();
Sleep(1000);
Decor().yellow();
cout << "\n\t\t\tSaving your information to the Database\n";
Decor().reset();
if (Queries().saveToDb_user(first_name, last_name, USN, Deptt, username, gender, _dob, email, password_enc) == true)
{
Decor().green();
cout << "\n\t\t\t[0]Account created succesfully\n";
Decor().reset();
Sleep(2000);
clr;
Decor().yellow();
cout << "Redirecting to Login Page...\n";
Sleep(2500);
clr;
Decor().kle_logo();
login();
}
else {
Decor().red_black();
cout << "\n\t\t\tThere was some problem while saving your information to cloud\n";
Decor().reset();
Decor().red();
cout << "\n\t\t\tCheck your internet and try again...\n";
Sleep(1000);
goto start;
}
//user -> (first_name, last_name, _dob, follower_count, username, password_enc, email, USN, Deptt)
}
void HomePage::BuildLayout()
{
int choice;
clr; // clr is to clear the screen
cout<<"usn::"<<USN; // here the USN is empty
Decor().kle_logo();
Decor().yellow_black();
cout << "\t\t\t\t\tHome Page" << endl;
Decor().reset();
Decor().blue();
cout << "(1) PROFILE";
Decor().lblue();
cout << "\t\t\t\t\t\t\t\t\t\t\t\t(2) Messages";
Decor().red();
cout << endl << "(3) LOGOUT";
Decor().purple_black();
cout << "\t\t\t\t\t\t\t\t\t\t\t\t(4) Post";
Queries().display_post();
Decor().reset();
cout << endl;
cin >> choice;
switch (choice)
{
case 1:
clr;
cout << endl << endl;
Decor().yellow();
cout << "Redirecting to profile page...";
Sleep(2000);
clr;
Decor().kle_logo();
ProfileHandler().viewProfile();
break;
case 2:
clr;
cout << endl << endl;
Decor().yellow();
cout << "Redirecting to Messages...";
Sleep(2000);
clr;
Decor().kle_logo();
//MessageHandler* obj;
break;
case 3:
clr;
char logout;
Decor().red();
cout << endl << endl;
cout << "Do you want to logout(y/n)? : ";
cin >> logout;
Decor().reset();
if (logout == 'y')
{
clr;
cout << endl << endl;
Decor().yellow();
cout << "Logging you out...";
Sleep(1000);
clr;
cout << endl << endl;
cout << "Logout Successfull...\n\nRedirecting to landing page\n";
Sleep(2000);
clr;
Decor().kle_logo();
}
break;
case 4:
Decor().kle_logo();
Decor().green_black();
cout << "\n\t\t\t\t New Post \t\t\t\t";
Decor().reset();
default:
break;
}
}
void ProfileHandler:: viewProfile()
{
int choice;
string* info = new string[100];
info = Queries().displayProfile(first_name, last_name, USN, Deptt, username, gender, _dob, email, password_enc);
cout << "usn: " << USN;
first_name = info[0];
last_name = info[1];
USN = info[2];
username = info[3];
email = info[4];
Deptt = info[5];
gender = info[6];
_dob = info[7];
password_enc = info[8];
Decor().blue_black();
cout << "\n\t\t\tFirst name: \n";
Decor().reset();
Decor().yellow();
cout << first_name << endl;
Decor().blue_black();
cout << "\n\t\t\tLast name: \n";
Decor().reset();
Decor().yellow();
cout << last_name;
Decor().blue_black();
cout << "\n\t\t\tUSN: \n";
Decor().reset();
Decor().yellow();
cout << USN << endl;
Decor().blue_black();
cout << "\n\t\t\tUsername: \n";
Decor().reset();
Decor().yellow();
cout << username;
Decor().blue_black();
cout << "\n\t\t\tEmail: \n";
Decor().reset();
Decor().yellow();
cout << email << endl;
Decor().blue_black();
cout << "\n\t\t\tDate of Birth: \n";
Decor().reset();
Decor().yellow();
cout << _dob;
Decor().blue_black();
cout << "\n\t\t\tDepartment: ";
Decor().reset();
Decor().yellow();
cout << Deptt << endl;
Decor().green_black();
cout << "\n\t\t\tGender: ";
Decor().reset();
Decor().yellow();
cout << gender;
Decor().red_black();
cout << "\n\t\t\tEncrypter Password: ";
Decor().reset();
Decor().yellow();
cout << password_enc;
cout << endl << endl;
Decor().red();
cout << "Enter 44 to go back: ";
cin >> choice;
if (choice == 44)
{
clr;
cout << endl << endl;
Decor().yellow();
cout << "Redirecting to Home page...";
Sleep(2000);
HomePage().BuildLayout();
}
}
User* item()
{
return nullptr;
}
