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  1. //Maxwell Brewer                 CS1A                     Chapter 9, p. 539, #11
  2. //
  3. /*******************************************************************************
  4.  * ARRAY EXPANDER
  5.  * _____________________________________________________________________________
  6.  * This program will dynamically allocate an array of a specified size.
  7.  * _____________________________________________________________________________
  8.  * INPUT
  9.  *   No direct input from the user
  10.  * 
  11.  * OUTPUT
  12.  *   Prints the original and expanded arrays,
  13.  *   showing the original values followed by zero-initialized elements.
  14.  *
  15.  ******************************************************************************/
  16.  
  17. #include <iostream>
  18. using namespace std;
  19.  
  20. int* expandArray(int *arr, int SIZE) {
  21.     // Dynamically allocate an array twice the size
  22.     int *expPtr = new int[2 * SIZE];
  23.  
  24.     // Initialize elements of new array
  25.     for (int i = 0; i < 2 * SIZE; i++) {
  26.         if (i < SIZE) {
  27.  
  28.             // Copy elements of the original array
  29.             *(expPtr + i) = *(arr + i);
  30.         } else {
  31.  
  32.             // Initialize additional elements to 0
  33.             *(expPtr + i) = 0;
  34.         }
  35.     }
  36.  
  37.     return expPtr;
  38. }
  39.  
  40. int main() {
  41.     int SIZE = 5;
  42.     int *arr = new int[SIZE]{1, 2, 3, 4, 5};
  43.  
  44.     // Print original array
  45.     cout << "Original array: ";
  46.     for (int i = 0; i < SIZE; i++) {
  47.         cout << arr[i] << " ";
  48.     }
  49.     cout << endl;
  50.  
  51.     // Expand the array
  52.     int *expandedArr = expandArray(arr, SIZE);
  53.  
  54.     // Print expanded array
  55.     cout << "Expanded array: ";
  56.     for (int i = 0; i < 2 * SIZE; i++) {
  57.         cout << expandedArr[i] << " ";
  58.     }
  59.     cout << endl;
  60.  
  61.     // Free memory
  62.     delete[] arr;
  63.     delete[] expandedArr;
  64.  
  65.     return 0;
  66. }
Success #stdin #stdout 0s 5280KB
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https://ideone.com/4vBOYb
Chapter 9, p. 539, #11
language:
C++ (gcc 8.3)
created:
227 days ago
visibility:
public

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