[C / C ++ Memory Memory] []

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malloc、realloc、calloc、free by C

• Be sure to determine whether the successful application of space
• calloc After the success of the application memory is initialized to 0.
• malloc, reallocDoes not initialize memory after the application is successful.
• After the dynamic memory allocation must freefree up space.

void *__cdecl malloc(size_t _Size);
void *__cdecl calloc(size_t _Count, size_t _Size);
void *__cdecl realloc(void *_Block, size_t _Size);

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char *ptr;
ptr = (char *)malloc(sizeof(char) * ArrLng);
ptr = (char *)calloc(ArrLng, sizeof(char));
ptr = (char *)realloc(ptr, sizeof(char) * ArrLng);
free(ptr);

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Heap head
stack stack

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new、delete by C++