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Dynamically Allocate Memory

Certification: Basic Level Accuracy: 59.09% Submissions: 22 Points: 5

Write a C++ program that dynamically allocates memory for an array of integers.

Example 1
     
  • Input: size = 5
    •  
  • Output: Memory allocated for 5 integers
    •  
  • Explanation: 
       
    • Step 1: Declare a pointer to store the address of the dynamically allocated array.
      •  
    • Step 2: Use the new operator to allocate memory for 5 integers.
      •  
    • Step 3: Initialize the allocated memory.
      •  
    • Step 4: Deallocate the memory using the delete operator when done.
      •  
    •
Example 2
     
  • Input: size = 10
    •  
  • Output: Memory allocated for 10 integers
    •  
  • Explanation: 
       
    • Step 1: Declare a pointer to store the address of the dynamically allocated array.
      •  
    • Step 2: Use the new operator to allocate memory for 10 integers.
      •  
    • Step 3: Initialize the allocated memory.
      •  
    • Step 4: Deallocate the memory using the delete operator when done.
      •  
    •
Constraints
     
  • 1 ≤ size ≤ 10^6
    •  
  • Use dynamic memory allocation
    •  
  • Time Complexity: O(1) for allocation
    •  
  • Space Complexity: O(n) where n is the size of the array
    •
ArraysPointers and ReferencesWiproSnowflake
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Hint
Solution

Solution Hints

    
  
  • Use the new operator to allocate memory for the array.
    • 
  
  • Ensure the memory is properly allocated and handle any potential errors.
    •

Steps to solve by this approach:

 Step 1: Define a function allocate_array that takes an integer size parameter.
 Step 2: Dynamically allocate memory for an array of integers with the specified size.
 Step 3: Return the pointer to the allocated memory.
 Step 4: In main, call allocate_array with a size value.
 Step 5: Check if the returned pointer is not nullptr to verify allocation success.

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