освободить память си
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Synopsis
#include <stdlib.h> void free(void *ptr);
освобождает область памяти на которую указывает ptr - указатель.
если переданый аргумент - это не результат работы calloc, malloc или
realloc , то поведение функции не определено.
Description
The free function causes the space pointed to by ptr to be deallocated, that is, made
available for further allocation. If ptr is a null pointer, no action occurs. Otherwise, if
the argument does not match a pointer earlier returned by the calloc, malloc,or
realloc function, or if the space has been deallocated by a call to free or realloc,
the behavior is unde?ned.
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