程序代码：

// 学生管理系统.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#define LEN 1024


//==================================

void vIface();
void vgn2();
//学生成员结构
typedef struct sStudent
{
    int iNumber;
    char cName[50];
    char cSex[4];
    int iAge;
    int iGrade;
    int iClass;
    int iSeat;
    float fChina;
    float fEnglish;
    float fMath;
    double dAverage;
    double dTotal;
    sStudent* pNext;

}cstu[LEN],stu;
//创建单链表并录入数据
stu* screate(stu* lhead)
{
    int i=0;
    char Yn[4];

    stu* pNew, *pEnd;
    lhead =(stu*) malloc(sizeof(stu));
    if (lhead == NULL)
    {
        printf("创建头节点失败!\n");
        exit(1);
    }
    pEnd = lhead;
    printf("输入y或者n选择操作:\n");
    scanf_s("%s", Yn,4);
    while(strncmp(Yn,"Y",4)==0|| strncmp(Yn, "y", 4) == 0)
    {
        i++;
        pNew= (stu*)malloc(sizeof(stu));
        printf("学号:");
        scanf_s("%d", &pNew->iNumber);
        printf("姓名:");
        scanf_s("%s", pNew->cName,50);
        printf("性别:");
        scanf_s("%s", pNew->cSex,4);
        printf("年龄:");
        scanf_s("%d", &pNew->iAge);
        printf("年级:");
        scanf_s("%d", &pNew->iGrade);
        printf("班级:");
        scanf_s("%d", &pNew->iClass);
        printf("座位:");
        scanf_s("%d", &pNew->iSeat);

        printf("请输入三门科目成绩:\n");
        getchar();
        printf("语文:");
        scanf_s("%f", &pNew->fChina);
        printf("数学:");
        scanf_s("%f", &pNew->fMath);
        printf("英语:");
        scanf_s("%f", &pNew->fEnglish);
        if (pNew == NULL)
        {
            pEnd = pNew;
        }
        else
        {
            
            pNew->pNext = NULL;
            pEnd->pNext = pNew;
            pEnd = pNew;
        }

        getchar();
        printf("输入y或者n选择操作:\n");
        scanf_s("%c", Yn, 4);
        if (strncmp(Yn, "Y", 4) != 0 || strncmp(Yn, "y", 4) != 0)
        {
            continue;
        }
        
    }

    pEnd->pNext = NULL;
    return lhead;
}
//打印学生管理系统链表
void vPrint(stu* lHead)
{
    int i=0;
    stu* sTemp;
    sTemp = lHead;
    if (sTemp == NULL)
    {
        printf("空链表!\n");
        exit(1);
    }
    sTemp=sTemp->pNext;
    
    while (sTemp!= NULL)

    {
        sTemp->dTotal = sTemp->fChina + sTemp->fMath + sTemp->fEnglish;
        sTemp->dAverage = sTemp->dTotal / 3;
        printf("学号\t姓名\t性别\t年龄\t年级\t班级\t座位\t 语文\t\t 数学\t\t 英语\t\t 总分数\t 平均分\n");
        printf("%d\t %s\t %s\t %d\t %d\t %d\t %d\t %.4f分\t %.4f\t %.4f\t %.4lf\t %.4lf\n", sTemp->iNumber, sTemp->cName, sTemp->cSex, sTemp->iAge, sTemp->iGrade, sTemp->iClass, sTemp->iSeat, sTemp->fChina, sTemp->fMath, sTemp->fEnglish, sTemp->dTotal, sTemp->dAverage);
        sTemp = sTemp->pNext;
        ++i;
    }
    printf("总节点为:%d\n", i);
}

void vSearch(stu* lHead,int search_num)
{
    int i = 0;
    stu* iTemp;
    iTemp = lHead;
    if (iTemp == NULL)
    {
        printf("空链表");
        exit(1);
    }
    iTemp = iTemp->pNext;
    while (iTemp!=NULL)
    {
        i++;
        iTemp = iTemp->pNext;
        iTemp->dTotal = iTemp->fChina + iTemp->fMath + iTemp->fEnglish;
        iTemp->dAverage = iTemp->dTotal / 3;
        if (iTemp->iNumber == search_num)
        {
            printf("查询到以下信息:\n");
            printf("\n");
            printf("学号\t姓名\t性别\t年龄\t年级\t班级\t座位\t 语文\t\t 数学\t\t 英语\t\t 总分数\t 平均分\n");
            printf("%d\t %s\t %s\t %d\t %d\t %d\t %d\t %.4f分\t %.4f\t %.4f\t %.4lf\t %.4lf\n", iTemp->iNumber, iTemp->cName, iTemp->cSex, iTemp->iAge, iTemp->iGrade, iTemp->iClass, iTemp->iSeat, iTemp->fChina, iTemp->fMath, iTemp->fEnglish, iTemp->dTotal, iTemp->dAverage);
            break;
        }
    }
    printf("\n");
    printf("查询成功!\n");
}

void vIface()
{
    printf("\t=============================学生信息管理系统=============================\n");
    printf("\t*\t\t\t\t\t\t\t\t"); printf("\t *\n");
    printf("\t*\t\t\t\t\t\t\t\t"); printf("\t *\n");
    printf("\t*\t\t\t"); printf("      *1.录入学生信息*"); printf("\t\t\t\t *\n");
    printf("\t*\t\t\t\t\t\t\t\t"); printf("\t *\n");
    printf("\t*\t\t\t"); printf("      *2.查询学生信息*"); printf("\t\t\t\t *\n");
    printf("\t*\t\t\t\t\t\t\t\t"); printf("\t *\n");
    printf("\t*\t\t\t"); printf("      *3.打印学生信息*"); printf("\t\t\t\t *\n");
    printf("\t*\t\t\t\t\t\t\t\t"); printf("\t *\n");
    printf("\t*\t\t\t"); printf("      *4.删除学生信息*"); printf("\t\t\t\t *\n");
    printf("\t*\t\t\t\t\t\t\t\t"); printf("\t *\n");
    printf("\t*\t\t\t"); printf("      *5.排序学生成绩*"); printf("\t\t\t\t *\n");
    printf("\t*\t\t\t\t\t\t\t\t"); printf("\t *\n");
    printf("\t*\t\t\t"); printf("      *6.保存学生信息*"); printf("\t\t\t\t *\n");
    printf("\t*\t\t\t\t\t\t\t\t"); printf("\t *\n");
    printf("\t*\t\t\t"); printf("      *7.载入学生信息*"); printf("\t\t\t\t *\n");
    printf("\t*\t\t\t\t\t\t\t\t"); printf("\t *\n");
    printf("\t*\t\t\t"); printf("      *8.修改学生信息*"); printf("\t\t\t\t *\n");
    printf("\t*\t\t\t\t\t\t\t\t"); printf("\t *\n");
    printf("\t*\t\t\t"); printf("      *8.退出系统操作*"); printf("\t\t\t\t *\n");
    printf("\t*\t\t\t\t\t\t\t\t"); printf("\t *\n");
    printf("\t*\t\t\t\t\t\t\t\t"); printf("\t *\n");
    printf("\t=============================学生信息管理系统=============================\n");
    vgn2();
}

//界面选项操作
void vgn2()
{
    stu* itemp=NULL;
    int inum;
    int itemp_num;
    printf("输入1~8并回车选择需要操作的选项:\n");
    scanf_s("%d", &inum);
    switch (inum)
    {
    case 1:
        screate(itemp);
        break;
    case 2:
        printf("输入要查询的节点:\n");
        scanf_s("%d", &itemp_num);
        vSearch(itemp, itemp_num);
        break;
    case 3:
        vPrint(itemp);
        break;
    default:
        printf("操作错误!\n");
        break;
    }
    vIface();
}
int main()
{
    //stu* itemp;
    //int inum;
    /*itemp=screate();
    vPrint(itemp);
    printf("输入要查询的节点:\n");
    scanf_s("%d", &inum);
    vSearch(itemp,inum);*/
    vIface();
    return 0;
}