library management.txt

一个简单的学生成绩管理系统

/*源程序*/


/*头文件*/
#include "stdio.h"    /*I/O函数*/
#include "stdlib.h"   /*其它说明*/
#include "string.h"   /*字符串函数*/
#include "conio.h"   /*屏幕操作函数*/
#include "mem.h"   /*内存操作函数*/
#include "ctype.h"   /*字符操作函数*/
#include "alloc.h"   /*动态地址分配函数*/



/*常量定义*/
#define  NULL 0
#define  OK   1



/*数据类型*/
typedef struct node
{
    int num;
    char name[9];
    int Scholarship;
    int english;
    int math;
    int computer;
    int average;
    struct node *next;
}student_info;


/*函数原型*/


int menu();
int showInfo(student_info *p);
int addInfo(student_info *p);
int deleInfo(student_info *p);
int update(student_info *p);
int update(student_info *p);
int updateInfo(student_info *p);
int sortInfo(student_info *p);
int saveInfo(student_info *p);
int show_file(student_info *stu);
char quitSys();


/*主函数*/

void main()
{
    int ch;
    char mark;
    student_info *p;
    p=(student_info *)malloc(sizeof(student_info));
    p->next=NULL;
    textcolor(YELLOW);
    textbackground(BLUE);
    printf("\n\n\n**WELLCOME to NORTHESTEN UNIVERSITY SOFTWARE COLLEGE'S LIBRARY Management!**\n\n");
    show_file(p);
    ch=menu();

    while(1)
    {
        switch(ch)
        {
            case'0':
            {
                printf("\nInput error!Press any key contiune!...");
                getch();
                break;
            }
            case'1':
            {
                showInfo(p);
                printf("\nPress any key to continue!...");
                getch();
                break;
            }
            case'2':
            {
                addInfo(p);
                printf("\nPress any key to continue!...");
                getch();
                break;
            }
            case'3':
            {
                deleInfo(p);
                printf("\nPress any key to continue!...");
                getch();
                break;
            }
            case'4':
            {
                sortInfo(p);
                printf("\nPress any key to continue!...");
                getch();
                break;
            }
            case'5':
            {
                updateInfo(p);
                printf("\nPress any key to continue!...");
                getch();
                break;
            }
            case'6':
            {
                saveInfo(p);
                printf("\nPress any key to continue!...");
                getch();
                break;
            }
            case'7':
            {
                mark=quitSys();
                if(mark==OK)
                {
                    saveInfo(p);
                    freeInfo(p);
                    exit(1);
                }
                else break;
            }
        }

    }
}


/*程序界面*/


int menu()
{
    int i=0;
    int c=8;
    char s[3];
    char menu[]={"\n\n\nStudents' Information Management\n\n\n"
                 "***************MENU**************\n"
                 "1,Show the students' information\n"
                 "2,Add a new students' information\n"
                 "3,Delet a student's information\n"
                 "4,Show the average marks of student\n"
                 "5,Update a student's information\n"
                 "6,Save the student's information\n"
                 "7,quit the system\n"
                };


    gotoxy(1,25);
    printf("press any key enter menu......\n");
    getch();
    clrscr();

    gotoxy(1,1);
    textcolor(YELLOW);
    textbackground(BLUE);
    gotoxy(10,2);          /*移动光标*/
    putch(0xc9);
    for(i=1;i<64;i++)
       putch(0xcd);     /*输出上边框水平线*/
    putch(0xbb);         /*输出右上角边框┓*/
    for(i=3;i<20;i++)
    {
       gotoxy(10,i);
       putch(0xba);   /*输出左右垂直线*/

       gotoxy(74,i);
       putch(0xba);
    }
    gotoxy(10,20);putch(0xc8);  /*输出左下角边框┗ */
    for(i=1;i<64;i++)
       putch(0xcd);      /*输出下边框水平线*/
    putch(0xbc);                 /*出右下角边框┛*/
    window(11,3,73,19);       /*制作显示菜单的窗口，大小根据菜单条数设计*/
    clrscr();
    for(i=0;i<9;i++)       /*输出主菜单数组*/
   {
      gotoxy(10,i+1);
      cprintf("%s",menu[i]);
   }
    textbackground(BLUE);
    window(1,1,80,25);
    gotoxy(10,21);
    do
    {
       printf("\n     Enter you choice(0~7):");
       scanf("%s",s);
       c=atoi(s);
    }while(c<0||c>7);
    return c;

}


/*显示学生的基本情况*/

int showInfo(student_info *p)
{
    student_info *stu;
    stu=p->next;
    if(stu==NULL)
    {
        printf("The List is empty!...");
        return;
    }
    textcolor(RED);
    textbackground(GREEN);
    printf("\n\n\n*********students**********\n\n");
    printf("|Num:    |Name:   |Scholarship:|English:|Math:   |Computer:|Average:|");
    while(stu)
    {
        printf("|%d      |%s      |%d         |%d      |%d      |%d       |%d      |",stu->num,stu->name,stu->Scholarship,stu->english,stu->math,stu->computer,stu->average);
        stu=stu->next;
    }
}


/*添加一个学生记录*/


int addInfo(student_info *p)
{
    student_info *stu,*t;
    stu=(student_info *)malloc(sizeof(student_info));
    printf("Please enter the information of the student:");
    printf("|Num:    |Name:   |Scholarship:|English:|Math:   |Computer:|");
    scanf("|%d      |%s      |%d          |%d      |%d      |%d       |",&stu->num,&stu->name,&stu->Scholarship,&stu->english,&stu->math,&stu->computer);
    stu->average=(stu->english+stu->math+stu->computer)/3;
    t=p->next;
    if(t==NULL)
    {
        p->next=stu;
        stu->next=NULL;
    }
    else
    {
        p->next=stu;
        stu->next=t;
    }
}


/*删除一个学生的资料*/

int deleInfo(student_info *p)
{
    student_info *stu,*t;
    int i,mark=0;
    char ch;
    t=p;
    stu=t->next;
    if(stu==NULL)
    {
        printf("The list is empty!...");
        return ;
    }
    printf("Please enter the num of the student:\n");
    scanf("%d",&i);
    while(stu)
    {
        if(stu->num==i)
        {
            printf("Really delet it ?(Y or N):\n");
            ch=getch();
            if(ch=='y'||ch=='Y')
            {
                printf("Wait.....\n");
                t->next=stu->next;
                free(stu);
                mark=1;
                printf("Success delet the student's information!");
            }
            else return;
        }
        else
        {
            t=t->next;
            stu=stu->next;
        }
    }
    if(mark==0)
        printf("The student of this num is not exit!");


}


/*修改一个学生的资料*/

int update(student_info *p)
{
    student_info *stu;
    char ch;
    stu=p;
    clrscr();
    printf("\nWhich item do u wanna update:\n\n");
    printf("1,num  /2,name  /3,Scholarship  /4,english  /5,math  /6,computer(end with  0)\n\n");
    while((ch=getch())!='0')
    {
        switch(ch)
        {
            case'1':
            {
                printf("Please enter the new num:\n");
                scanf("%d",&stu->num);
                printf("which item do u want to update:\n");
                break;
            }
            case'2':
            {
                printf("Please enter the new name:\n");
                scanf("%s",&stu->name);
                printf("which item do u want to update:\n");
                break;
            }
            case'3':
            {
                printf("Please enter the new Scholarship:\n");
                scanf("%d",&stu->Scholarship);
                printf("which item do u want to update:\n");
                break;
            }
            case'4':
            {
                printf("Please enter the new english:\n");
                scanf("%d",&stu->english);
                printf("which item do u want to update:\n");
                break;
            }
            case'5':
            {
                printf("Please enter the new math:\n");
                scanf("%d",&stu->math);
                printf("which item do u want to update:\n");
                break;
            }
            case'6':
            {
                printf("Please enter the new computer:\n");
                scanf("%d",&stu->computer);
                printf("which item do u want to update:\n");
                break;
            }
            default:
            {
                printf("what u input is error");
                printf("which item do u want to update:\n");
                break;
            }
        }
    }

    return;
}


int updateInfo(student_info *p)
{
    student_info *stu,*t;
    int i,mark=0;
    t=p;
    stu=t->next;
    if(stu==NULL)
    {
        printf("The list is empty!...");
        return;
    }
    printf("Please enter the num of the student:\n");
    scanf("%d",&i);
    while(stu)
    {
        if(stu->num==i)
        {
            update(stu);
            mark=1;
            return;
        }
        else
        {
            t=t->next;
            stu=stu->next;
        }
    }
    if(mark==0)
        printf("The student of this num is not exit!");
}


/*学生成绩排序*/

int sortInfo(student_info *p)
{
    int i=1;
    student_info *stu,*t1,*t2;
    stu=p;
    if(stu->next==NULL)
    {
        printf("There is no student's information!");
        return;
    }
    t1=stu->next;
    t2=stu->next;
    textcolor(RED);
    textbackground(GREEN);
    while(t1)
    {
        while(t2)
        {
            if(t1->average>t2->average)
            {
             stu->next=t2;
             t1->next=t2->next;
             t2->next=t1;
            }
            t2=t2->next;
        }
        t1=t1->next;
        stu=stu->next;
    }
    stu=p->next;
    printf("---------------------------------------");
    printf("|No:     |Num:    |Name:    |Average: |");
    while(stu)
    {
        printf("|%d      |%d      |%s       |%d       |",i,stu->num,stu->name,stu->average);
        stu=stu->next;
        i++;
    }
    printf("---------------------------------------");

}


/*保存信息到磁盘*/

int saveInfo(student_info *p)
{
    student_info *stu;
    FILE *fp;
    stu=p->next;
    if(stu==NULL)
    {
        printf("The  list is empty!");
        return;
    }
    fp=fopen("student.txt","wt");
    if(fp==NULL)
    {
        printf("The file open error!");
        return;
    }
    if(stu==NULL)
    {
        printf("The  list is empty!");
        fputc('#',fp);
        fclose(fp);
        return;
    }
    printf("\n\nWait......\n\n");
    while(stu)
    {
        fputc('*',fp);
        fprintf(fp,"%d\n%s\n%d\n%d\n%d\n%d\n%d\n",stu->num,stu->name,stu->Scholarship,stu->english,stu->math,stu->computer,stu->average);
        stu=stu->next;
    }
    fputc('#',fp);
    fclose(fp);
    printf("Success to save the file!\n");
}


/*释放整个链表*/

int freeInfo(student_info *p)
{
    student_info *stu,*t;
    t=p;
    stu=t->next;

 
    while(stu)
    {
        t->next=stu->next;
        free(stu);
        /*t=t->next;*/
        stu=t->next;

    }
    free(p);
}


/*从磁盘读取文件*/


int show_file(student_info *stu)
{
    FILE *fp;
    student_info *p,*q=NULL;
    char ch,file[10];
    int i=0;
    q=stu;
    printf("please input the file name:\n");
    scanf("%s",file);
    if((fp=fopen(file,"r"))==NULL)
    {
        printf("\n\nFile error!\nPress any key to exit!...");
        getch();
        exit(1);
    }
    printf("dfffdfgfdddf");
    ch=fgetc(fp);
    while(ch!='#')
    {
        p=(student_info *)malloc(sizeof(student_info));

        fscanf(fp,"%d\n%s\n%d\n%d\n%d\n%d\n%d\n",&stu->num,&stu->name,&stu->Scholarship,&stu->english,&stu->math,&stu->computer,&stu->average);
        q->next=p;
        i++;
        q=p;
        p++;
        ch=fgetc(fp);
    }
    if(i==0)
    {
        printf("\nThe file is empty\nPress any key to continue...");
        getch();
        return;
    }
    else
    {
        q->next=NULL;
        printf("There are %d students' information!\nPress any key to continue...",i);
        getch();
        return;
    }
}


/*退出系统*/


char quitSys()
{
    char ch;
    printf("Quit the system?(Y or N):");
    ch=getch();
    if(ch=='Y'||ch=='y')
        return OK;
}