栈的c语言实现

#include<iostream>
using namespace std;

#define STACK_INIT_SIZE 10
#define STACKINCREMENT 10
#define ElemType int

typedef struct
{
	ElemType *base;
	int top;
	size_t capacity;
}SqStack;

bool IsFull(SqStack *st)
{
	return st->top >= st->capacity;
}
bool IsEmpty(SqStack *st)
{
	return st->top == 0;
}
bool InitStack(SqStack *st)
{
	st->base = (ElemType*)malloc(STACK_INIT_SIZE * sizeof(ElemType));
	st->top = 0;
	st->capacity = STACK_INIT_SIZE;
	return true;
}
ElemType GetTop(SqStack *st)
{
	if(!IsEmpty(st))
	{
		return st->top;
	}
	cout<<"stack empty!"<<endl;
	return -1;
}
void Push(SqStack *st, ElemType item)
{
	if(!IsFull(st))
	{
		st->base[st->top++] = item;
	}
	else
	{
		cout<<"stack full!"<<endl;
	}
}
void Show(SqStack *st)
{
	for(int i=st->top-1; i>=0; --i)
	{
		cout<<st->base[i]<<" ";
	}
	cout<<endl;
}
ElemType Pop(SqStack *st)
{
	if(!IsEmpty(st))
	{
		st->top--;
		return st->base[st->top];
	}
	return -1;
}

int main()
{
	SqStack st;
	InitStack(&st);
	int i = 0;
	for(; i<5; ++i)
		Push(&st,i);
	Pop(&st);
	Show(&st);
	return 1;
}