4.获取栈顶元素内容 void GetTop(stack s, stackEntry *item) if( StackEmpty(S) exit(“ Stack is empt!y”); else *item=S. top->item; 5.判断栈S是否空 int StackEmpty(STACK S if(S top=-NULL return TRUE else false 请单鼠标左键换页!4. 获取栈顶元素内容 void GetTop(STACK S,StackEntry *item) { if (StackEmpty(S)) exit(“Stack is empty”); else *item=S.top->item; } 5. 判断栈S是否空 int StackEmpty(STACK S) { if (S.top==NULL) return TRUE; else FALSE; }