C: malloc() and free()


    Stack *S;

    S = (Stack*) malloc(sizeof(Stack));
       ...
    free(S);


    Stack *S_Array;

    S_Array = (Stack*) malloc(sizeof(Stack) * 10));
       ...
    free(S_Array);

C++: new and delete


    Stack *S;

    S = new Stack();
       ...
    delete S;


    Stack *S_Array;

    S_Array = new Stack[10];
       ...
    delete [] S_Array;