Question

Assuming an integer array is dynamically allocated:

int *array = new int[10];

What is the correct way of deallocating this array to not cause any memory leaks?

delete array[10];

delete array;

delete [10] array;

delete *array;

delete [] array;

Answer 1

The below statement is correct in deallocating this array to not cause any memory leaks.

delete [] array;

Explanation:

delete array[10];

The first statement is incorrect because this statement has a syntax error.

delete array;

The second statement is incorrect because this statement will not delete the complete memory allocated to the array.

delete [10] array;

The third statement is incorrect because this statement has a syntax error.

delete *array;

The fourth statement is incorrect because this statement has a syntax error.

delete [] array;

The fifth statement is incorrect because this statement will delete the complete memory allocated to the array.