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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. class User
  5. {
  6. public:
  7.     int userid;
  8.     static int allusers;
  9.     string email, password;
  10.     bool isLoggedIn;
  11.  
  12.     User(string email, string password)
  13.     {
  14.         this->email = email;
  15.         this->password = password;
  16.         this->userid = ++allusers;
  17.         this->isLoggedIn = false;
  18.     }
  19.  
  20.     void login(string email, string password)
  21.     {
  22.         if (this->email == email && this->password == password)
  23.         {
  24.             cout << "Login successful\n";
  25.             isLoggedIn = true;
  26.         }
  27.         else if (this->email == email)
  28.         {
  29.             cout << "Wrong password\n";
  30.         }
  31.         else
  32.         {
  33.             cout << "Wrong email\n";
  34.         }
  35.     }
  36.  
  37.     void logout()
  38.     {
  39.         if (isLoggedIn)
  40.         {
  41.             cout << "User with email " << email << " has logged out.\n";
  42.             isLoggedIn = false;
  43.         }
  44.         else
  45.         {
  46.             cout << "User is not logged in.\n";
  47.         }
  48.     }
  49.  
  50.     void changepassword(string oldPassword, string newPassword)
  51.     {
  52.         if (this->password == oldPassword)
  53.         {
  54.             this->password = newPassword;
  55.             cout << "Password changed successfully.\n";
  56.         }
  57.         else
  58.         {
  59.             cout << "Old password is wrong\n";
  60.         }
  61.     }
  62. };
Success #stdin #stdout 0s 5264KB
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stdin 
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stdout 
Standard output is empty
https://ideone.com/KyeATx
language:
C++14 (gcc 8.3)
created:
87 days ago
visibility:
public

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