数据结构—线性栈（通过数组实现）C语言描述

线性栈（通过数组实现）

** 栈模型**

C代码实现

** 代码注释非常详细，可直接编译运行**

//
// Created by wen on 2021/9/20.
//
#define MAX_SIZE 1024
#include "stdio.h"
#include "stdlib.h"
#include "string.h"


// stack struct
typedef struct SStack{
    void * data[MAX_SIZE];
    int S_size;
}SStack;
//保护数据的安全，避免用户直接操作栈
typedef void * SeqStack ;

//初始化栈
SeqStack init_SeqStack(){
    SStack * myStack = malloc(sizeof (SStack));
    //判断栈是否为空
    if(myStack ==NULL){
        return NULL;
    }
    //设置容量。初始化大小
    myStack->S_size = 0;
    //初始数组
    //里面数组置0
    memset(myStack->data,0,sizeof (void *)*MAX_SIZE);
    return myStack;
}
//入栈
//入栈的本质是数组的尾插
void Push_SeqStack(SeqStack Stack ,void* data){
    //判断数据有效性
    if(Stack == NULL)
    {
        return;
    }
    if(data == NULL)
    {
        return;
    }
    //还原栈
    SStack * myStack = Stack;
    //判断栈是否变满
    if(myStack->S_size >= 1024)
    {
        return;
    }
    //尾插
    myStack->data[myStack->S_size]=data;
    //更新大小
    myStack->S_size ++;

}
//出栈，返回出栈的元素
void* Pop_SeqStack(SeqStack * Stack)
{
    //出栈的本质是尾删
    if(Stack ==NULL)
    {
        return NULL;
    }
    //还原栈的真实结构体
    SStack *myStack = Stack;
    //判断是否为空栈
    if(myStack->S_size == 0)
    {
        return NULL;
    }
    //* tmp_data为出栈的元素
    void * tmp_data =  myStack->data[myStack->S_size-1];
    //尾部元素置位空
    myStack->data[myStack->S_size-1]==NULL;
    //栈元素减去1
    myStack->S_size --;
    //返回出栈的元素
    return tmp_data;
}
//返回栈顶
void * Top_SeqStack(SeqStack Stack){
    if(Stack == NULL)
    {
        return NULL;
    }
    //还原栈结构体
    SStack * myStack = Stack;
    //如果栈为空栈，返回值为NULL。
    if(myStack->S_size == 0){
        return NULL;
    }
    //不为空栈则返回元素
    return myStack->data[myStack->S_size-1];

}
//返回栈的大小
int Size_SeqStack(SeqStack Stack){

    //还原栈
    SStack * myStack =Stack;
    //其他情况照常返回
    return myStack->S_size;
}
//判断栈是否为空
int isEmpty_SeqStack(SeqStack Stack){

    if(Stack ==NULL){
        return -1;
        //空栈清况1
    }
    SStack * myStack =Stack;
    if(myStack->S_size == 0){
        return 1;
        //空栈清况2
    }
    //其他情况不为空
    return 0;
}
//销毁栈
void destroy_SeqStack(SeqStack Stack){
    if(Stack == NULL)
    {
        return;
    }
    //释放堆
    free(Stack);
    printf("destroy success!\n");
}
/*---------------------------------------------------------*/
//测试
typedef struct Person{
    char name[64];
    int age;
}Person;
//测试接口
void test2(){
    //测试数据
    Person P1 ={"tom1",1};
    Person P2 ={"tom2",2};
    Person P3 ={"tom3",3};
    Person P4 ={"tom4",4};
    Person P5 ={"tom5",5};
    Person P6 ={"tom6",6};
    Person P7 ={"tom7",7};
    Person P8 ={"tom8",8};
    Person P9 ={"tom9",9};
    Person P10 ={"tom10",10};

    Person a[10]={P1,P2,P3,P4,P5,P6,P7,P8,P9,P10};
    //初始化栈
    SeqStack * myStack = init_SeqStack();
    for (int i = 0; i <10 ; ++i) {
        Push_SeqStack(myStack,a+i);
    }
    int Stack_size = Size_SeqStack(myStack);
    printf("Stack size :%d\n",Stack_size);
    printf("Stack include element: \n");
    //查看栈的元素
    //站不为空继续出栈
    while (isEmpty_SeqStack(myStack)==0){
        Person * p = Top_SeqStack(myStack);
        printf("name:%s,age:%d\n",p->name,p->age);
        //出栈
        Pop_SeqStack(myStack);
    }
    //出栈完之后的元素个数
    printf("After stack size :%d\n",Size_SeqStack(myStack));
    //销毁
    destroy_SeqStack(myStack);
}
int main(){
    test2();
    return 0;
}

程序图例