Specify the 2 library functions to dynamically allocate memory?

The two library functions to dynamically allocate memory are malloc() and calloc().

1. malloc(): This function is used to allocate a block of memory dynamically. The size of the memory block is specified in bytes as the argument. It returns a pointer to the first byte of the allocated space if the allocation is successful. If the allocation is not successful, it returns a NULL pointer.

   Here is how you can use malloc():

   int *ptr;
   ptr = (int*) malloc(100 * sizeof(int));
   

   In this example, malloc() allocates memory for 100 integers and returns a pointer to the first byte of this memory block. The pointer is then stored in ptr.

2. calloc(): This function is similar to malloc(), but it has two arguments: the number of elements and the size of each element. calloc() also initializes the allocated memory to zero.

   Here is how you can use calloc():

   int *ptr;
   ptr = (int*) calloc(100, sizeof(int));
   

   In this example, calloc() allocates memory for 100 integers, initializes all bytes in the allocated memory to zero, and returns a pointer to the first byte of this memory block. The pointer is then stored in ptr.