Dynamic Memory Allocation PDF
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This document explains dynamic memory allocation in C. It describes the functions malloc, calloc, free, and realloc for allocating and freeing memory during runtime. The document provides a concise overview of these functions and their intended use within C programming.
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Dynamic Memory Allocation It is a way to allocate memory to a data structure during the runtime. We need some functions to allocate & free memory dynamically. Functions for DMA a. malloc( ) b. calloc( ) c. free( ) d. realloc( ) malloc( ) memory allocation takes number of bytes to be allocated...
Dynamic Memory Allocation It is a way to allocate memory to a data structure during the runtime. We need some functions to allocate & free memory dynamically. Functions for DMA a. malloc( ) b. calloc( ) c. free( ) d. realloc( ) malloc( ) memory allocation takes number of bytes to be allocated & returns a pointer of type void ptr = (*int) malloc(5 * sizeof(int)); calloc( ) continuous allocation initializes with 0 ptr = (*int) calloc(5, sizeof(int)); free( ) We use it to free memory that is allocated using malloc & calloc free(ptr); realloc( ) reallocate (increase or decrease) memory using the same pointer & size. ptr = realloc(ptr, newSize);
