How Do I Create and Manage Dynamic Integer Arrays in C ?

Creating Dynamic Arrays of Integers in C

When managing arrays in your C programs, it's often beneficial to create dynamic arrays that can adjust to changing data requirements. Dynamic arrays use the new keyword to allocate memory on the heap, allowing you to determine their size at runtime.

Instantiating a Dynamic Array with New

To create a dynamic array of integers, follow this syntax:

int* array = new int[size];

where size represents the number of elements you want in the array. Using new allocates a contiguous block of memory in the heap and returns a pointer to the first element in the array.

Dynamic Array Example

Consider the following C program:

int main() {
  int size;

  std::cin >> size;

  int *array = new int[size];

  delete[] array;

  return 0;
}

In this example, we create a dynamic array of integers of a size specified by the user. The delete[] keyword deallocates the memory allocated by new when the array is no longer required.

Caution

When working with dynamic arrays, it's crucial to remember to delete the arrays after use. Failing to do so can lead to memory leaks and other issues.

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