malloc() Function in C library with EXAMPLE - Guru99
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The malloc() function stands for memory allocation. It is a function which is used to allocate a block of memory dynamically.
Skiptocontent
WhatismallocinC?
Themalloc()functionstandsformemoryallocation.Itisafunctionwhichisusedtoallocateablockofmemorydynamically.Itreservesmemoryspaceofspecifiedsizeandreturnsthenullpointerpointingtothememorylocation.Thepointerreturnedisusuallyoftypevoid.Itmeansthatwecanassignmallocfunctiontoanypointer.
Syntax
ptr=(cast_type*)malloc(byte_size);
Here,
ptrisapointerofcast_type.
Themallocfunctionreturnsapointertotheallocatedmemoryofbyte_size.
Example:ptr=(int*)malloc(50)
Whenthisstatementissuccessfullyexecuted,amemoryspaceof50bytesisreserved.Theaddressofthefirstbyteofreservedspaceisassignedtothepointerptroftypeint.
Consideranotherexampleofmallocimplementation:
#include
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