stack

stack.h文件

#pragma once

#include<stdio.h>
#include<stdlib.h>
#include<stdbool.h>
#include<assert.h>

typedef int STDataType;

typedef struct stack
{
	int* a;
	int top;
	int capacity;
}ST;

void STInit(ST* ps);
void STPush(ST* ps, STDataType x);
void STPop(ST* ps);
int STSize(ST* ps);
bool STEmpty(ST* ps);
void STDestroy(ST* ps);
STDataType STTop(ST* ps);					

stack.c文件

#include"stack.h"

void STInit(ST* ps)
{
	assert(ps);
	ps->a = malloc(sizeof(STDataType) * 4);
	if (ps->a == NULL)
	{
		perror("malloc fail:");
		return;
	}
	ps->capacity = 4;
	ps->top = 0;
}

void STPush(ST* ps, STDataType x)
{
	assert(ps);
	if (ps->top == ps->capacity)
	{
		STDataType* tmp = realloc(ps->a, sizeof(STDataType) * ps->capacity * 2);
		if (tmp == NULL)
		{
			perror("realloc fail: ");
			return;
		}
		ps->a = tmp;
		ps->capacity *= 2;
	}
	ps->a[ps->top++] = x;
}

void STPop(ST* ps)
{
	assert(ps);
	assert(!STEmpty(ps));
	ps->top--;
}

int STSize(ST* ps)
{
	assert(ps);
	return ps->top;
}

bool STEmpty(ST* ps)
{
	assert(ps);
	return ps->top == 0;
}

void STDestroy(ST* ps)
{
	assert(ps);
	free(ps->a);
	ps->a = NULL;
	ps->capacity = 0;
	ps->top = 0;
}

STDataType STTop(ST* ps)
{
	return ps->a[ps->top-1];
}

test.c文件

#pragma once

#include<stdio.h>
#include<stdlib.h>
#include<stdbool.h>
#include<assert.h>

typedef int STDataType;

typedef struct stack
{
	int* a;
	int top;
	int capacity;
}ST;

void STInit(ST* ps);
void STPush(ST* ps, STDataType x);
void STPop(ST* ps);
int STSize(ST* ps);
bool STEmpty(ST* ps);
void STDestroy(ST* ps);
STDataType STTop(ST* ps);