Simple stack operation set (c language)

Sequential storage

ypedef int Position;
struct SNode {
    
    
    ElementType *Data; /* 存储元素的数组 */
    Position Top;      /* 栈顶指针 */
    int MaxSize;       /* 堆栈最大容量 */
};
typedef struct SNode *Stack;
 
Stack CreateStack( int MaxSize )
{
    
    
    Stack S = (Stack)malloc(sizeof(struct SNode));
    S->Data = (ElementType *)malloc(MaxSize * sizeof(ElementType));
    S->Top = -1;
    S->MaxSize = MaxSize;
    return S;
}
 
bool IsFull( Stack S )
{
    
    
    return (S->Top == S->MaxSize-1);
}
 
bool Push( Stack S, ElementType X )
{
    
    
    if ( IsFull(S) ) {
    
    
        printf("堆栈满");
        return false;
    }
    else {
    
    
        S->Data[++(S->Top)] = X;
        return true;
    }
}
 
bool IsEmpty( Stack S )
{
    
    
    return (S->Top == -1);
}
 
ElementType Pop( Stack S )
{
    
    
    if ( IsEmpty(S) ) {
    
    
        printf("堆栈空");
        return ERROR; /* ERROR是ElementType的特殊值，标志错误 */
    }
    else 
        return ( S->Data[(S->Top)--] );
}

Linked list

typedef struct SNode *PtrToSNode;
struct SNode {
    
    
    ElementType Data;
    PtrToSNode Next;
};
typedef PtrToSNode Stack;
 
Stack CreateStack( ) 
{
    
     /* 构建一个堆栈的头结点，返回该结点指针 */
    Stack S;
 
    S = (Stack)malloc(sizeof(struct SNode));
    S->Next = NULL;
    return S;
}
 
bool IsEmpty ( Stack S )
{
    
     /* 判断堆栈S是否为空，若是返回true；否则返回false */
    return ( S->Next == NULL );
}
 
bool Push( Stack S, ElementType X )
{
    
     /* 将元素X压入堆栈S */
    PtrToSNode TmpCell;
 
    TmpCell = (PtrToSNode)malloc(sizeof(struct SNode));
    TmpCell->Data = X;
    TmpCell->Next = S->Next;
    S->Next = TmpCell;
    return true;
}
 
ElementType Pop( Stack S )  
{
    
     /* 删除并返回堆栈S的栈顶元素 */
    PtrToSNode FirstCell;
    ElementType TopElem;
 
    if( IsEmpty(S) ) {
    
    
        printf("堆栈空"); 
        return ERROR;
    }
    else {
    
    
        FirstCell = S->Next; 
        TopElem = FirstCell->Data;
        S->Next = FirstCell->Next;
        free(FirstCell);
        return TopElem;
    }
}