dynamic allocation in c code example

Example 1: allocate memory c

// Use malloc to allocate memory
ptr = (castType*) malloc(size);
int *exampl = (int*) malloc(sizeof(int));
// Use calloc to allocate and inizialize n contiguous blocks of memory
ptr = (castType*) calloc(n, size);
char *exampl = (char*) calloc(20, sizeof(char));

Example 2: how to use malloc in c

int* a =(int*)malloc(sizeof(int))

Example 3: how to use malloc in c

ptr = (cast-type*) malloc(byte-size)