How to correct warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]

Question

I have a class with a buffer which is later filled from reading a file:

char* m_buffer;

... and in the class destructor I perform the following:

int i;
for(i=0; i < m_size; i++) {
  delete (char*)m_buffer[i];
}
delete m_buffer;

I am receiving a compiler warning at delete (char*)m_buffer[i] :

warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]

I've read a few of the other questions regarding similar issues but I'm not able to understand how those solutions apply.

Update and to answer comments :
m_buffer is initialized as follows:

m_buffer = new char[m_size];

Answer 1

If m_buffer is an array then simply use:

delete [] m_buffer;

There is no need to individually delete its elements.

Answer 2

delete is intended to free an object allocated by new. So the important question is, how do you allocate m_buffer ? In your current code, it seems to be an array, because you iterate over the elements of one and cast every element to a char * before deleting it. If you allocated m_buffer with new m_buffer[m_size] , then the correct way would be delete[] m_buffer .