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  1. // Nathanael Schwartz                 CS1A                 Chapter 8, P. 515, #1
  2. //
  3. /*******************************************************************************
  4.  *
  5.  * VERIFY CHARGE ACCOUNT NUMBER
  6.  * _____________________________________________________________________________
  7.  * This program prompts the user to enter a charge account number and verifies 
  8.  * its validity by checking it against a predefined list using a linear search.
  9.  * _____________________________________________________________________________
  10.  * INPUT
  11.  *   userAccount      : Charge account number input by the user
  12.  *
  13.  * OUTPUT
  14.  *   Message indicating if the number is valid or invalid
  15.  *
  16.  ******************************************************************************/
  17. #include <iostream>
  18. using namespace std;
  19.  
  20. // Function prototype
  21. bool linearSearch(const int[], int, int);
  22.  
  23. int main() {
  24.     // List of valid charge account numbers
  25.     const int SIZE = 18;
  26.     int validAccounts[SIZE] = {
  27.         5658845, 4520125, 7895122, 8777541, 8451277, 1302850,
  28.         8080152, 4562555, 5552012, 5050552, 7825877, 1250255,
  29.         1005231, 6545231, 3852085, 7576651, 7881200, 4581002
  30.     };
  31.  
  32.     int userAccount; // User-entered account number
  33.  
  34.     // Prompt the user to enter an account number
  35.     cout << "Enter a charge account number: ";
  36.     cin >> userAccount;
  37.  
  38.     // Search for the account number in the array
  39.     if (linearSearch(validAccounts, SIZE, userAccount)) {
  40.         cout << "The account number is valid." << endl;
  41.     } else {
  42.         cout << "The account number is invalid." << endl;
  43.     }
  44.  
  45.     return 0;
  46. }
  47.  
  48. /**************************************************************
  49.  *                        linearSearch                         *
  50.  * This function performs a linear search on an integer array *
  51.  * to find a specified value. Returns true if found;         *
  52.  * otherwise, returns false.                                 *
  53.  **************************************************************/
  54. bool linearSearch(const int array[], int size, int value) {
  55.     for (int i = 0; i < size; i++) {
  56.         if (array[i] == value) {
  57.             return true;  // Value found, return true
  58.         }
  59.     }
  60.     return false; // Value not found, return false
  61. }
  62.  
Success #stdin #stdout 0.01s 5272KB
comments (?)
stdin 
4520125
stdout 
Enter a charge account number: The account number is valid.
https://ideone.com/U73n0A
language:
C++ (gcc 8.3)
created:
344 days ago
visibility:
secret

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