C Reference function free()

If you have allocated a memory block with the functions malloc(), calloc() or realloc() then you need to free the previously allocated memory.

Usage of free():

void free ( void * ptr );

Parameters:

The parameter is a pointer to a memory block that was allocated with malloc(), calloc() or realloc(). If you pass a null pointer then there will no action occur.

Return value:

No return value by the function free().

Source code example of free():


	#include<stdio.h>
	#include<stdlib.h>

	int main ()
	{
		int * buffer;

		/*get a initial memory block*/
		buffer = (int*) malloc (10*sizeof(int));

		/*free initial memory block*/
		free (buffer);
		return 0;
	}
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There are currently 5 responses to “C Reference function free()”

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  1. kalyan bagchi on April 22nd, 2011:

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  3. Amy on June 9th, 2012:

    thanks so much!
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