// single dynamic object e.g. struct
Type *ptr = malloc(sizeof(Type));  // declare and initialise
assert(ptr != NULL);
… use object referenced by ptr e.g. ptr->name …
free(ptr);

// dynamic array with "nelems" elements
int nelems = NumberOfElements;
ElemType *arr = malloc(nelems*sizeof(ElemType));
assert(arr != NULL);
… use array referenced by arr e.g. arr[4] …
free(arr);