Calloc
calloc is a C standard-library function that allocates contiguous storage for an array of elements and initializes all allocated bytes to zero.
Modern C, Third Edition
calloc is a C standard-library function that allocates storage for an array of elements and initializes all allocated bytes to zero.
- How it is used
- Allocates dynamically sized arrays while clearing their newly allocated storage.
- How deep it goes
- Defines the interface and bit-clearing behavior, then limits use to positive sizes and representations where zero bits initialize the type validly.
- Examples
- Uses an integer-array allocation example and contrasts calloc with assignment-based initialization for other object types.
- What you can do after
- Apply it via <stdlib.h> to obtain cleared storage for suitable dynamically allocated arrays and release that storage afterward.
Modern C
calloc is a C standard library function that allocates storage for an array of elements and initializes all allocated bits to zero.
- How it is used
- Allocates dynamically sized array storage whose allocated bits begin at zero.
- How deep it goes
- Defines calloc as a malloc specialization and relates it to void* storage, but does not develop implementation details.
- Examples
- Uses a large vector allocation and a platform-size feasibility exercise to contextualize dynamically allocated storage.
- What you can do after
- Apply it via stdlib.h when dynamically allocated storage should begin with all allocated bits cleared.
Related concepts
- mallocalternative to · malloc is a C standard-library function that allocates a specified number of bytes of uninitialized storage and returns a pointer to it or a null pointer if allocation fails.
- freeused by · free is a C standard-library function that releases dynamically allocated storage previously obtained from a compatible allocation function.
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