1、头文件sqstack.h

#include <stdio.h>
#define MAXSIZE 100

typedef struct SqStack
{
    void* data[MAXSIZE];
    int top;  //指向栈顶下标
}SqStack;

void InitStack(SqStack*);
int StackEmpty(SqStack*);
int StackLength(SqStack*);
void ClearStack(SqStack*);
void GetTop(SqStack*, void**);
void PushStack(SqStack*, void*);
void PopStach(SqStack*, void**);

2、相关函数操作文件sqstack.c

#include <stdio.h>
#include <string.h>
#include "SqStack.h"

//栈的初始化
void InitStack(SqStack* S)
{
    //空栈
    S->top = -1;
    memset(S->data, 0, sizeof(S->data));
}

int StackEmpty(SqStack* S)
{
    if(S->top == -1)
    {
        return 1;
    }

    return 0;
}

void ClearStack(SqStack* S)
{
    S->top = -1;
}

void GetTop(SqStack* S, void** e)
{
    if(S->top == -1)
    {
        printf("当前栈为空栈！");
        return;
    }

    *e = S->data[S->top];
}

void PushStack(SqStack* S, void* e)
{
    if(S->top == MAXSIZE - 1)
    {
        printf("栈满，无法压栈！");
        return;
    }
    S->top++;
    S->data[S->top] = e;
}

void PopStach(SqStack* S, void** e)
{
    if(S->top == -1)
    {
        printf("空栈，无法出栈！");
        return;
    }
    *e = S->data[S->top];
    S->top--;
}

int StackLength(SqStack* S)
{
    return S->top+1;
}

3、主函数测试文件main.c

#include <stdio.h>
#include <stdlib.h>
#include "SqStack.h"

typedef struct student
{
    int age;
    int id;
}stu;

int main()
{
    SqStack st;
    stu s[10];

    InitStack(&st);

    int i = 0;
    for(i = 0; i < 10; i++)
    {
        s[i].age = i + 20;
        s[i].id = i;
        PushStack(&st, &s[i]);
    }
    printf("当前栈的大小为：%d\n", StackLength(&st));

    stu* sp;
    for(i = 0; i < 5; i++)
    {
        GetTop(&st, (void**)&sp);
        printf("当前栈顶元素值为：%d, %d\n", sp->age, sp->id);

        PopStach(&st, (void**)&sp);
        printf("出栈元素值为：%d, %d\n", sp->age, sp->id);
        printf("\n");
    }

    printf("当前栈的大小为：%d\n", StackLength(&st));

    ClearStack(&st);
    printf("当前栈的大小为：%d\n", StackLength(&st));


    //printf("Hello world!\n");
    return 0;
}