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  1. #include <iostream>
  2. #include <vector>
  3. using namespace std;
  4.  
  5. class Book {
  6. public:
  7.     string id, name;
  8.     bool issue = false;
  9.  
  10.     Book(string i, string n) {
  11.         id = i;
  12.         name = n;
  13.     }
  14. };
  15.  
  16. vector<Book> b = {
  17.     {"B001","C++"},
  18.     {"B002","Java"},
  19.     {"B003","Python"}
  20. };
  21.  
  22. #define RED "\033[31m"
  23. #define GREEN "\033[32m"
  24. #define BLUE "\033[34m"
  25. #define CYAN "\033[36m"
  26. #define YELLOW "\033[33m"
  27. #define RESET "\033[0m"
  28.  
  29. int main() {
  30.  
  31.     string u, p, id;
  32.     int ch;
  33.  
  34.     // COLORFUL LOGIN PAGE
  35.     cout << CYAN;
  36.     cout << "\n****************************************\n";
  37.     cout << "*      LIBRARY MANAGEMENT SYSTEM       *\n";
  38.     cout << "****************************************\n";
  39.     cout << RESET;
  40.  
  41.     cout << BLUE << "\n========== LOGIN PAGE ==========\n" << RESET;
  42.  
  43.     cout << YELLOW << "Username : " << RESET;
  44.     cin >> u;
  45.  
  46.     cout << YELLOW << "Password : " << RESET;
  47.     cin >> p;
  48.  
  49.     if(u != "admin" || p != "1234") {
  50.         cout << RED << "\nWrong Login!\n" << RESET;
  51.         return 0;
  52.     }
  53.  
  54.     cout << GREEN << "\nLogin Successful!\n" << RESET;
  55.  
  56.     // MENU
  57.     cout << CYAN;
  58.     cout << "\n1. View Books";
  59.     cout << "\n2. Issue Book";
  60.     cout << "\n3. Return Book";
  61.     cout << "\n4. Exit\n";
  62.     cout << RESET;
  63.  
  64.     while(true) {
  65.  
  66.         cout << "\nEnter Choice: ";
  67.         cin >> ch;
  68.  
  69.         if(ch == 1) {
  70.  
  71.             cout << "\n--- BOOKS ---\n";
  72.  
  73.             for(auto x : b) {
  74.                 cout << x.id << " - " << x.name;
  75.  
  76.                 if(x.issue)
  77.                     cout << RED << " (Issued)";
  78.  
  79.                 cout << RESET << endl;
  80.             }
  81.         }
  82.  
  83.         else if(ch == 2) {
  84.  
  85.             cout << "Enter Book ID: ";
  86.             cin >> id;
  87.  
  88.             for(auto &x : b) {
  89.                 if(x.id == id) {
  90.                     x.issue = true;
  91.                     cout << GREEN << "Book Issued!\n" << RESET;
  92.                 }
  93.             }
  94.         }
  95.  
  96.         else if(ch == 3) {
  97.  
  98.             cout << "Enter Book ID: ";
  99.             cin >> id;
  100.  
  101.             for(auto &x : b) {
  102.                 if(x.id == id) {
  103.                     x.issue = false;
  104.                     cout << GREEN << "Book Returned!\n" << RESET;
  105.                 }
  106.             }
  107.         }
  108.  
  109.         else if(ch == 4) {
  110.             cout << RED << "Good Bye!\n" << RESET;
  111.             break;
  112.         }
  113.  
  114.         else {
  115.             cout << RED << "Invalid Choice!\n" << RESET;
  116.         }
  117.     }
  118.  
  119.     return 0;
  120. }
  121.  
Success #stdin #stdout 0.01s 5308KB
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stdin
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Standard input is empty
stdout
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****************************************
*      LIBRARY MANAGEMENT SYSTEM       *
****************************************

========== LOGIN PAGE ==========
Username : Password : 
Wrong Login!

https://ideone.com/Fe1k54
language:
C++ (gcc 8.3)
created:
12 hours ago
visibility:
public

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