学生管理系统源码

                     学生管理系统源代码


#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define LEN sizeof(struct teacher)
struct admin
{
    char name[20];
    char pw[20];
}admin1,admin2;

struct teacher
{
    int id;
    int age;
    struct teacher *next;
}; 


//管理员注册函数
int zhuce()
{   
    FILE *fp;
    printf("\t\t请注册管理员\n");
    printf("请输入您的注册账户：\n");
    scanf("%s",admin1.name);
    printf("请输入您的注册密码： \n");
        system("stty-echo");
    scanf("%s",admin1.pw);
        system("sttyecho");
    if((fp=fopen("fileguanli.txt","wb"))==NULL)
    {
        printf("da kai cuowu");
    }
    if(fwrite(&admin1,sizeof(structadmin),1,fp ) !=1 )
        printf("xie ru cuowu\n");
    fclose(fp);
    return 0;
}


//管理员读取登录函数
int duqu()
{   int i;
    FILE *fp;
    char name2[20];
    char pw2[20];
    int ret1=0;
    int ret2=0;
    int result=0;
    if((fp=fopen("fileguanli.txt","rb"))==NULL)
    {  
        printf("请先注册管理员！\n");
    }
    if(fread(&admin2,sizeof(structadmin),1,fp)!=1)
    {
        printf("du qu cuo wu\n");
    }
    for(i=0;i<3;i++)
    {
        printf("请输入管理员名称:");
        scanf("%s",name2);
        printf("请输入管理员密码:");
        system("stty-echo");
        scanf("%s",pw2);
        system("stty  echo");
        ret1 =strcmp(name2,admin2.name);
        ret2 =strcmp(pw2,admin2.pw);

        if((ret1==0) &&(ret2==0))
        {
            result = 1;
            printf("登录成功\n");
            zhujiemian();
            break;
        }
        else
        {
            result = 0;
            printf("帐号或密码错误，请重新输入\n");
        }
    }
    if(i==3)
    {
        printf("输入次数超过3次，程序退出\n");
        exit(0);
    }

    fclose(fp);
    return 0;
}

//管理员操作函数
int admin_operate()
{          void search(struct teacher*head);
    struct teacher *creat(int n);
            struct teacher *xiugai(structteacher *head);
    void cunpan( struct teacher*head);
    struct teacher*duquteacher(void);
    void xianshi(void);
    void duquxianshi();
     struct teacher *head;
     struct teacher *delete(struct teacher*head,int id);
            void print(structteacher  *head);
    int select = 0;
    int n;
    while(1)
    {
        printf("\t\t1:添加老师信息\t\t2:删除老师信息\n\t\t3:修改老师信息\t\t
        4:查询老师信息\n\t\t5:显示文件信息\t\t6:保存教师信息\n\t\t7:显示当前信息\t\t8:管理员退出\n");

        printf("请选择操作选项:");
        scanf("%d",&select);
        switch(select)
        {
            case 1:
                printf("请输入添加教师信息的数量：\n");
                scanf("%d",&n);
                struct teacher*head;
                head=creat(n);
                break;
            case 2:
                printf("删除教师信息\n");
                struct teacher
                {
                    int id;
                    int age;
                    struct teacher*next;
                };
                int id;
                printf("请输入要删除的教师id\n");
                scanf("%d",&id);
                head=delete(head,id);

                break;
            case 3:
                        head=xiugai(head);
                printf("修改教师信息\n");
                break;
            case 4:
                search(head);
                printf("查找教师信息\n");
                break;
            case 5:
                printf("显示教师信息\n");
                duquxianshi();
                break;
            case 6:
                cunpan(head);

                printf("保存成功\n");
                break;
            case 7:
                 print(head);

                break;
            case 8:
                 printf("返回主菜单\n");
               return 8;
                default:
                  break;

                printf("modifystudent\n");
                break;
            case 9:
                printf("searchstudent\n");
                break;
            case 10:
                break;
        }//switch
    }//while
}

//主界面函数
int zhujiemian()
{
    int select = 0;
    int login_retval = 0;
    int operate_retval = 0;


    system("clear");
    while(1)
    {  printf("\n");

        printf("\n");

        printf("\n");
        printf("\t\t***********欢迎使用学生管理系统***********\n");
        printf("\t\t||\t\t1:管理员操作\t\t||\n\t\t||\t\t
        2:教师操作\t\t||\n\t\t||\t\t3:学生操作\t\t||\n\t\t||\t\t4:退出\t\t\t||\n");
        printf("\t\t******************************************\n");
        //      system("clear");
        printf("\t\t请选择操作选项:");
        scanf("%d",&select);
        switch(select)
        {
            case 1:
                operate_retval =admin_operate();
                break;
            case 2:
                printf("teacher\n");
                break;
            case 3:
                printf("student\n");
                break;
            case 4:
                printf("系统已经成功退出,谢谢使用!\n");
                exit(0);
                break;
            default:
                break;     
        }//switch
    }//while



    return 0;
}

// 创建教师链表

struct teacher *creat(int n)
{
    int i;
    struct teacher *head,*p1,*p2;
    head=NULL;
    head=p2=(struct teacher * )malloc(LEN);
    printf("请输入编号，年龄（按回车键结束输入）\n");
    scanf("%d,%d",&p2->id,&p2->age);
    for(i=2;i<=n;i++)
    {
        p1=(struct teacher * )malloc(LEN);
        printf("请输入编号，年龄（按回车结束输入）\n");
        scanf("%d,%d",&p1->id,&p1->age);

        p2->next=p1;
        p2=p1;
    }
    p2->next=NULL;
    return(head);
}

//存盘函数
void cunpan( struct teacher *head)
{
    FILE *fp;
    struct teacher *p;
    if((fp=fopen("fileteacher","wb"))==NULL)
    {
        printf("bu neng  da kai wen jian \n");
    }
    p=head;
    while(p!=NULL)
    {
        if(fwrite(p,LEN,1,fp)!=1)
        {
            printf("xie ru chu  cu\n ");
            return;
        }
        p=p->next;
    }
    fclose(fp);
}
//打印链表

void print(struct teacher *head)
{
    struct teacher *p;
    p=head;
        printf("\t\t\t\t编号    年龄\n");
    while(p!=NULL)
    {
        printf("\t\t\t\t%d       %d\n",p->id,p->age);
        p=p->next;
    }

}
// 查找函数
void search(struct teacher *head)
{
    int id=0;
    struct teacher *p=NULL;
    struct teacher *q=NULL;
    q=p=head;
    printf("\t\t\t请输入需要查询的教师ID:");
    scanf("%d",&id);
    while(p!=NULL)
    {
        if(p->id==id)
        {
            printf("\t\t\t编号     年龄\n");
            printf("\t\t\t%d        %d\n",p->id,p->age);
            break;
        }
        else
        {
            p=p->next;
        }
    }
    if(p==NULL)
    {
        printf("\t\t\t\t\t\t\t\t该ID不存在！\n");
    }
}

//修改函数
struct teacher *xiugai(struct teacher *head)
{
    int select=0;
    int age;
    struct teacher *p=NULL;
    int id=0;
    char judge=NULL;
    int flag=0;
    p=head;
    if(head==NULL)
    {
        printf("\t教师链表为空\n");
        return head;
    }
    p=head;
    while(1)
    {
        printf("\t请输入修改的教师ID:");
        scanf("%d",&id);
        while(p!=NULL)
        {
            if(p->id==id)
            {
                break;
            }

            p=p->next;
        }
        if(p==NULL)
        {
            printf("\t没有这个老师");
        }
        else
        {
            while(1)
            {
                printf("\t编号\t\t年龄\n");
                printf("\t\t%d\t%d\n",p->id,p->age);
                printf("\t1:编号 2:年龄 3:退出\n");
                printf("\t请选择修改的内容");
                scanf("%d",&select);
                switch(select)
                {
                    case 1:
                        printf("\t请输入新的编号：");
                        scanf("%d",&p->id);
                        break;
                    case 2:
                        printf("\t请输入新的年龄：");
                        scanf("%d",&p->age);
                        break;
                    case 3:
                        flag=1;
                        break;
                    default:
                        break;
                }
                if(flag)
                {
                    break;
                }
                printf("\t继续修改(y),退出(n):");
                while(getchar()!='\n');
                scanf("%c",&judge);
                if(judge == 'n')
                {
                    break;
                }
                else
                {
                    continue;
                }

            }//while
        }
        printf("\t是否继续修改新的教师信息(y),退出(n):");
        while(getchar()!='\n');
        scanf("%c",&judge);
        if(judge == 'n')
        {
            break;
        }
        else
        {
            continue;
        }

    }//while

    return head;
}


//读取文件里的 教师信息 并且显示
void duquxianshi()
{
    struct teacher *head;

    struct teacher *s;
    struct teacher *p;
    s=NULL;
    p=NULL;
    FILE *fp;
    if ((fp = fopen ("fileteacher","r+")) == NULL)
    {
        printf ("\t\t\t\t打开教师文件失败！\n");
    }
    printf("\t\t\t\t正在读取文件...\n");
    s=malloc (LEN);
    fread (s, LEN, 1, fp);
    if (s == NULL)
    {
        printf ("\t\t\t\t教师文件为空!\n");
        head = NULL;
    }
    head = p = s;
    s=s->next;
    printf("编号    年龄\n");
    printf("%d      %d\n",head->id,head->age);
    while (!feof (fp))
    {

        s = malloc (LEN);
        if (fread (s,LEN, 1, fp) !=1)
        {
            free (s);
            break;
        }

        printf("%d       %d\n",s->id,s->age);
        p->next = s;

        p->next = malloc (LEN);
        p = s;
    }
    p->next = NULL;
    fclose (fp);
    printf("\t\t\t\t已读取教师文件!\n");
}
//删除教师信息
struct teacher *delete(struct teacher *head,int id)
{ int n;
    struct teacher *p1,*p2;
    if(head==NULL)
    {
        printf("list isnull\n");
        return head;
    }
    p1=head;
    while(id!=p1->id&&p1->next!=NULL)
    {
        p2=p1;
        p1=p1->next;
    }
    if(id==p1->id)
    {
        if(p1==head)
        {head==p1->next; }
        else
            p2->next=p1->next;
        printf("请输入要删除的编号:%d\n",id);
        n=n-1;
    }
    else printf("%d zhao budao\n",id);
    printf("删除成功\n");
    return (head);
}

//主函数
int  main()
{
    int a;
    int b;
    int select;
    system("clear");
    printf("\n\n\n\n\n\n\n\n\n");
    while(1)   
    {  printf("\t\t*********************************************\n");
        printf("\t\t1.注册管理员  2.管理员登录   3.退出程序 \n");
        printf("\t\t*********************************************\n");
        printf("\t\t请选择操作选项：");
        scanf("%d",&select);
        switch(select)
        {
            case 1:zhuce();
                   printf("注册成功！\n");
                   break;
            case  2:duqu();
                    break;
            case 3:
            default :
                    break;
        }
    }
    return 0;
}