free
From cppreference.com
| Defined in header <stdlib.h>
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| void free( void* ptr ); |
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Deallocates the space previously allocated by malloc(), calloc() or realloc(). If ptr is null-pointer, the function does nothing.
The behavior is undefined if ptr does not match a pointer returned earlier by malloc(), calloc() or realloc(). Also, the behavior is undefined if the memory area referred to by ptr has already been deallocated, that is, free() or {{rlpf|has already been called with ptr as the argument and no calls to malloc(), calloc() or realloc() resulted in a pointer equal to ptr afterwards.
Contents |
[edit] Parameters
| ptr | - | pointer to the memory to deallocate |
[edit] Return value
(none)
[edit] Example
#include <stdlib.h> int main(int argc, char* argv[]) { int* ptr = (int*) malloc( sizeof(int) ); free(ptr); return 0; }
[edit] See also
| C++ documentation for free
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