学生信息管理系统

/*1、增加学生信息2、修改学生信息3、显示学生信息4、查询学生信息5、删除学生信息6、对学生信息进行排序7、保存学生信息至记录文件8、从记录文件读取学生信息9、新建学生信息文件10、运行结束（1）学生信息：学号、姓名、性别、几门课成绩、平均成绩、总成绩、名次；（2）排序：可以按照学号、姓名、课程等信息灵活进行升序、降序来排序；（3）查询：可以按照学号、姓名等条件来查询。*/#include <iostream>#include <stdio.h>#include <stdlib.h>#include <string.h>#include <windows.h># define LEN sizeof(struct Student)using namespace std;struct Student{    char num[10];  /*学号*/    char name[20]; /*姓名*/    char sex[10];  /*性别*/    int age;       /*年龄*/    char phone[12];/*电话*/    char QQ[12];   /*QQ号*/    float cscore;  /*C语言成绩*/    float escore;  /*英语成绩*/    struct Student *next;};char filename[30];//全局变量，用来保存要打开的文件名字/*生成链表*/struct Student *Creat(int n){    void menu_PRint_in(void);    struct Student *head;    struct Student *p1, *p2;    system("cls");    for(int i=1; i<n+1; i++)    {        p1 = (struct Student*)malloc(LEN);        menu_print_in();        scanf("%s%s%s%d%s%s%f%f",p1->num,p1->name,p1->sex,              &p1->age,p1->phone,p1->qq,&p1->cscore,&p1->escore);        p1->next = NULL;        if(i==1)        {            head = p2 = p1;        }        else        {            p2->next = p1;            p2 = p1;        }    }    return(head);}/*数据存盘(wb只写)*/void WriteData_wb(struct Student *head){    FILE *fp;    struct Student *p;    if((fp = fopen(filename, "wb"))==NULL)        printf("/a error! Can not open the file!");    p = head;    while(p!=NULL)    {        if(fwrite(p,LEN,1,fp)!=1)        {            printf("写入数据出错/n");            fclose(fp);            return;        }        p=p->next;    }    fclose(fp);}/*数据存盘(ab追加)*/void WriteData_ab(struct Student *head){    FILE *fp;    struct Student *p;    if((fp = fopen(filename, "ab"))==NULL)        printf("/a error! Can not open the file!");    p = head;    while(p!=NULL)    {        if(fwrite(p,LEN,1,fp)!=1)        {            printf("写入数据出错/n");            fclose(fp);            return;        }        p=p->next;    }    fclose(fp);}/*读取数据*//*读取数据文件保存到链表中 ，返回指向此链表头指针*/struct Student *ReadData(void){    struct Student *head = NULL;    struct Student *p1, *p2;//s = p1;p = p2;    FILE *fp;    if((fp=fopen(filename,"rb+"))==NULL)    {        printf("打开文件出错/n");        exit(0);    }    while(!feof(fp))    {        if((p1=(struct Student*)malloc(LEN))==NULL)        {            printf("内存申请出错/n");            fclose(fp);            exit(0);        }        if(fread(p1,LEN,1,fp)!=1)        {            free(p1);            break;        }        if(head==NULL)            head=p2=p1;        else        {            p2->next=p1;            p2=p1;        }    }    fclose(fp);    return (head);}/*【1】全量查询*/void Print_inquire_all(void){    void menu_print_out(void);    struct Student *pt;    pt = ReadData();    menu_print_out();    do    {        printf("%-10s%6s%8s%4d%13s%11s  %4.1f %4.1f %4.1f %4.1f/n",               pt->num,pt->name,pt->sex,pt->age,pt->phone,pt->qq,pt->cscore,               pt->escore,(pt->cscore+pt->escore)/2,pt->cscore+pt->escore);        pt = pt->next;    }    while(pt!=NULL);    printf("/n/n");}/*【2】学号查询*/int Print_inquire_num(){    void menu_print_out(void);    struct Student *pt;    char str_num[10];    printf("◎请输入您要查询的学号:");    scanf("%s", str_num);    pt = ReadData();    menu_print_out();    do    {        if(strcmp(pt->num,str_num)==0)        {            printf("%-10s%6s%8s%4d%13s%11s  %4.1f %4.1f %4.1f %4.1f/n",                   pt->num,pt->name,pt->sex,pt->age,pt->phone,pt->qq,pt->cscore,                   pt->escore,(pt->cscore+pt->escore)/2,pt->cscore+pt->escore);            printf("/n/n");            return 0;        }        pt = pt->next;    }    while(pt!=NULL);    printf("数据库中没有存储您要查询的数据！/n");    printf("/n/n");    return 0;}/*【3】姓名查询*/int Print_inquire_name(){    void menu_print_out(void);    struct Student *pt;    char str_name[20];    printf("◎请输入您要查询的姓名:");    scanf("%s", str_name);    pt = ReadData();    menu_print_out();    do    {        if(strcmp(pt->name,str_name)==0)        {            printf("%-10s%6s%8s%4d%13s%11s  %4.1f %4.1f %4.1f %4.1f/n",                   pt->num,pt->name,pt->sex,pt->age,pt->phone,pt->qq,pt->cscore,                   pt->escore,(pt->cscore+pt->escore)/2,pt->cscore+pt->escore);            printf("/n/n");            return 0;        }        pt = pt->next;    }    while(pt!=NULL);    printf("数据库中没有存储您要查询的数据！/n");    printf("/n/n");    return 0;}/*【4】模糊查询*/int Print_inquire_fuzzy(void){    void menu_print_out(void);    struct Student *pt;    char str_find[20];    int m = 0;    printf("◎请输入您要查询的关键词:");    scanf("%s", str_find);    pt = ReadData();    menu_print_out();    do    {        if(strstr(pt->num,str_find)!=0||strstr(pt->name,str_find)!=0                ||strstr(pt->sex,str_find)!=0||strstr(pt->phone,str_find)!=0                ||strstr(pt->qq,str_find)!=0)        {            printf("%-10s%6s%8s%4d%13s%11s  %4.1f %4.1f %4.1f %4.1f/n",                   pt->num,pt->name,pt->sex,pt->age,pt->phone,pt->qq,pt->cscore,                   pt->escore,(pt->cscore+pt->escore)/2,pt->cscore+pt->escore);            m = 1;        }        pt = pt->next;    }    while(pt!=NULL);    if(!m)        printf("数据库中没有存储您要查询的数据！/n");    printf("/n/n");    return 0;}/*成绩统计*/int Print_inquire_stats(void){    struct Student *head, *p1;    float CMIN, CMAX, EMIN, EMAX, SMIN, SMAX;    head = ReadData();    p1 = head;    CMIN = CMAX = p1->cscore;    EMIN = EMAX = p1->escore;    SMIN = SMAX = p1->cscore + p1->escore;    while(p1->next!=NULL)    {        if(p1->cscore > CMAX)        {            CMAX = p1->cscore;        }        if(p1->cscore < CMIN)        {            CMIN = p1->cscore;        }        if(p1->escore > EMAX)        {            EMAX = p1->escore;        }        if(p1->escore < EMIN)        {            EMIN = p1->escore;        }        if((p1->cscore + p1->escore) > SMAX)        {            SMAX = (p1->cscore + p1->escore);        }        if((p1->cscore + p1->escore) < SMIN)        {            SMIN = (p1->cscore + p1->escore);        }        p1 = p1->next;    }    printf("/n");    printf("◎数据库中C语言最高分为:%4.1f /n", CMAX);    printf("◎数据库中C语言最低分为:%4.1f /n/n", CMIN);    printf("◎数据库中英语最高分为:%4.1f /n", EMAX);    printf("◎数据库中英语最低分为:%4.1f /n/n", EMIN);    printf("◎数据库中总成绩最高分为:%4.1f /n", SMAX);    printf("◎数据库中总成绩最低分为:%4.1f /n/n", SMIN);    printf("/n");    printf("【PS:更多统计功能更在开发中,敬请期待O(∩_∩)O】/n/n");    return 0;}/*【1】修改数据之删除记录*/int Delete(){    struct Student *pt1, *pt2, *head;    char str_num[20];    printf("/n◎请输入您要删除的学号信息:");    scanf("%s", str_num);    pt1 = ReadData();    pt2 = pt1->next;    head = pt1;    while(pt2!=NULL)    {        if(strcmp(pt1->num,str_num)==0)        {            WriteData_wb(pt2);        }        else if(strcmp(pt2->num,str_num)==0)        {            pt1->next = pt2->next;            WriteData_wb(head);        }        pt2 = pt2->next;        pt1 = pt1->next;    }    if(pt2!=NULL)        printf("数据库中没有存储您要删除的数据！/n");    printf("/n/n");    return 0;}/*【2】修改数据之修改记录*/int Amend(){    void menu_print_in(void);    struct Student *pt1, *pt2, *head;    char str_num[20];    printf("◎请输入您要修改的学号信息:");    scanf("%s", str_num);    pt1 = ReadData();    pt2 = pt1->next;    head = pt1;    while(pt2!=NULL)    {        if(strcmp(pt1->num,str_num)==0)        {            menu_print_in();            scanf("%s%s%s%d%s%s%f%f",pt1->num,pt1->name,pt1->sex,                  &pt1->age,pt1->phone,pt1->qq,&pt1->cscore,&pt1->escore);            WriteData_wb(head);        }        else if(strcmp(pt2->num,str_num)==0)        {            menu_print_in();            scanf("%s%s%s%d%s%s%f%f",pt2->num,pt2->name,pt2->sex,                  &pt2->age,pt2->phone,pt2->qq,&pt2->cscore,&pt2->escore);            WriteData_wb(head);        }        pt2 = pt2->next;        pt1 = pt1->next;    }    if(pt2!=NULL)        printf("数据库中没有存储您要删除的数据！/n");    return 0;}/*【3】修改数据之整理数据*/int Neaten(){    struct Student *first;    struct Student *tail;    struct Student *p_min;    struct Student *min;    struct Student *p;    struct Student *head;    head = ReadData();    first = NULL;    while(head!=NULL)    {        for(p=head,min=head; p->next!=NULL; p=p->next)        {            if(strcmp(p->next->num,min->num)<0)            {                p_min = p;                min = p->next;            }        }        if(first==NULL)        {            first = min;            tail = min;        }        else        {            tail->next = min;            tail = min;        }        if(min==head)        {            head = head->next;        }        else        {            p_min->next = min->next;        }    }    if(first!=NULL)    {        tail->next = NULL;    }    head = first;    WriteData_wb(head);    return 0;}/*输入写入数据的数量*/int Creat_num(void){    printf("/n◎请输入您此次要添加的数据个数:");    int n;    if(scanf("%d", &n)!=1)    {        printf("/a error!");    }    return n;}/*选择将要打开的文件*/int File_name(){    printf("/n◎请输入您想要打开的文件:");    if(scanf("%s", filename)!=1)        printf("/a error!");    return 0;}/*主菜单*/void menu(void){    void menu_add(void);    void menu_inquire(void);    void menu_amend(void);    printf("              ╭════════╮              /n");    printf("╭══════╣学生管理系统V1.0╠══════╮/n");    printf("║            ╰════════╯            ║/n");    printf("║   【1】添加数据           【3】修改数据    ║/n");    printf("║                                            ║/n");    printf("║   【2】查询数据           【4】退出系统    ║/n");    printf("║                                            ║/n");    printf("║    designed by 东北林业大学计算机5班刘哲   ║/n");    printf("╰══════════════════════╯/n");    printf("◎请输入功能前的序号进入相应的工具:【   】/b/b");    int a = 0;    a = getchar();    while(a!='1'&&a!='2'&&a!='3'&&a!='4')    {        printf("error! please input the right number!/n");        putchar('/a');        getchar();        printf("◎请重新输入功能前的序号进入相应的工具:【   】/b/b");        a = getchar();    }    switch(a)    {    case '1':        File_name();        menu_add();        break;    case '2':        File_name();        menu_inquire();        break;    case '3':        File_name();        menu_amend();        break;    case '4':        exit(0);        break;    }    getchar();}/*二级菜单之添加数据*/void menu_add(void){    system("cls");    getchar();    printf("              ╭════════╮              /n");    printf("╭══════╣  添加数据方式  ╠══════╮/n");    printf("║            ╰════════╯            ║/n");    printf("║ 【1】新建文件 【2】增添数据 【3】返回菜单  ║/n");    printf("║                                            ║/n");    printf("╰══════════════════════╯/n");    printf("◎请输入功能前的序号进入相应的工具:【   】/b/b");    int a = 0;    a = getchar();    while(a!='1'&&a!='2'&&a!='3')    {        printf("error! please input the right number!/n");        putchar('/a');        getchar();        printf("◎请重新输入功能前的序号进入相应的工具:【   】/b/b");        a = getchar();    }    switch(a)    {    case '1':        WriteData_wb(Creat(Creat_num()));        printf("/n◎新建文件成功且数据已成功保存◎/n");        system("pause");        system("cls");        menu_add();        break;    case '2':        WriteData_ab(Creat(Creat_num()));        printf("/n◎数据已成功添加◎/n");        system("pause");        system("cls");        menu_add();        break;    case '3':        system("cls");        getchar();        menu();        break;    }}/*二级菜单之查询数据*/void menu_inquire(void){    system("cls");    getchar();    while(1)    {        system("cls");        printf("              ╭════════╮              /n");        printf("╭══════╣  查询数据方式  ╠══════╮/n");        printf("║            ╰════════╯            ║/n");        printf("║    【1】全量查询         【4】模糊查询     ║/n");        printf("║                                            ║/n");        printf("║    【2】学号查询         【5】成绩统计     ║/n");        printf("║                                            ║/n");        printf("║    【3】姓名查询         【6】返回菜单     ║/n");        printf("╰══════════════════════╯/n");        printf("◎请输入功能前的序号进入相应的工具:【   】/b/b");        int a = 0;        a = getchar();        while(a!='1'&&a!='2'&&a!='3'&&a!='3'&&a!='4'&&a!='5'&&a!='6')        {            printf("error! please input the right number!/n");            putchar('/a');            getchar();            printf("◎请重新输入功能前的序号进入相应的工具:【   】/b/b");            a = getchar();        }        switch(a)        {        case '1':            Print_inquire_all();            system("pause");            getchar();            break;        case '2':            Print_inquire_num();            system("pause");            getchar();            break;        case '3':            Print_inquire_name();            system("pause");            getchar();            break;        case '4':            Print_inquire_fuzzy();            system("pause");            getchar();;            break;        case '5':            Print_inquire_stats();            system("pause");            getchar();            break;        case '6':            system("cls");            getchar();            menu();            break;        }    }}/*二级菜单之修改数据*/void menu_amend(void){    system("cls");    getchar();    while(1)    {        system("cls");        printf("              ╭════════╮              /n");        printf("╭══════╣  修改数据方式  ╠══════╮/n");        printf("║            ╰════════╯            ║/n");        printf("║    【1】删除记录          【3】成绩排序    ║/n");        printf("║                                            ║/n");        printf("║    【2】修改记录          【4】返回菜单    ║/n");        printf("╰══════════════════════╯/n");        printf("◎请输入功能前的序号进入相应的工具:【   】/b/b");        int a = 0;        a = getchar();        while(a!='1'&&a!='2'&&a!='3'&&a!='4')        {            printf("error! please input the right number!/n");            putchar('/a');            getchar();            printf("◎请重新输入功能前的序号进入相应的工具:【   】/b/b");            a = getchar();        }        switch(a)        {        case '1':            Delete();            printf("/n/n◎已成功删除指定数据◎/n");            system("pause");            getchar();            break;        case '2':            Amend();            printf("/n/n◎已成功修改指定数据◎/n");            system("pause");            getchar();            break;        case '3':            Neaten();            printf("/n/n◎数据已成功按照学号重新排列◎/n");            system("pause");            getchar();            break;        case '4':            system("cls");            getchar();            menu();            break;        }    }}/*输入输出提示栏*/void menu_print_in(void){    printf("------------------------------------------------------------------------/n");    printf("学号      姓名     性别  年龄    电话         QQ        C    E          /n");    printf("------------------------------------------------------------------------/n");}void menu_print_out(void){    printf("--------------------------------------------------------------------------/n");    printf("学号      姓名     性别  年龄    电话         QQ        C    E    A    S  /n");    printf("--------------------------------------------------------------------------/n");}/*主函数*/int main(){//	SetConsoleTitle(L"C++学生信息管理系统");    system("COLOR 3F");    menu();    return 0;}