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  1. //Diego Martinez					CSC5				    Chapter 9, P.537, #1
  2. /*******************************************************************************
  3. *  ALLOCATE DYNAMIC INTEGER ARRAY
  4. * ______________________________________________________________________________
  5. * This program dynamically allocates an array of integers based on user input.   
  6. * It uses a function to create the array in memory and returns a pointer to it
  7. * for use in the main program.
  8. * 
  9. * Computation is based on the Formula:
  10. *	
  11. *	ptr = new int[size];
  12. * 
  13. *______________________________________________________________________________
  14. * INPUT
  15. *		
  16. *	size (number of elements to allocate in the array)
  17. *	user-entered values for each array element
  18. *	
  19. * OUTPUT
  20. *	
  21. *	display of the dynamically allocated array contents
  22. *	
  23. *******************************************************************************/
  24. #include <iostream>
  25. using namespace std;
  26.  
  27. // Function prototype
  28. int* allocateArray(int size);
  29.  
  30. int main()
  31. {
  32.     int size;
  33.  
  34.     // Ask user for number of elements
  35.     cout << "Enter number of elements to allocate: \n";
  36.     cin >> size;
  37.  
  38.     // Dynamically allocate array
  39.     int* arr = allocateArray(size);
  40.  
  41.     // Fill and display array
  42.     for (int i = 0; i < size; i++)
  43.     {
  44.         cout << "Enter value for element " << i + 1 << ": ";
  45.         cin >> arr[i];
  46.     }
  47.  
  48.     cout << "\nArray contents: ";
  49.     for (int i = 0; i < size; i++)
  50.     {
  51.         cout << arr[i] << " ";
  52.     }
  53.  
  54.     cout << endl;
  55.  
  56.     // Free memory
  57.     delete[] arr;
  58.  
  59.     return 0;
  60. }
  61.  
  62. // Function that allocates array dynamically
  63. int* allocateArray(int size)
  64. {
  65.     int* ptr = new int[size];
  66.     return ptr;
  67. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
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3
10
20
30
stdout
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Enter number of elements to allocate: 
Enter value for element 1: Enter value for element 2: Enter value for element 3: 
Array contents: 10 20 30
https://ideone.com/cbfF1C
ALLOCATE DYNAMIC INTEGER ARRAY Ch 9, P.537, #1
language:
C++ (gcc 8.3)
created:
4 days ago
visibility:
public

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