manager.c

学生信息管理系统 对成绩进行修改删除查看

#include <Stdio.h>
#include <Conio.h>
#include <stdlib.h>
#include <string.h> 

typedef struct studentinformation
{
    char num[10];   //学号
    char name[20];   //学生姓名
    int score[10];   //十次成绩
    struct studentinformation *next;
}infor;

int menu(void)
{
    int a;
    //clrscr();
    printf("=====THE MANAGEMENT OF THE STUDENTS' ASSIGNMENT======\n\n");
    printf("1-------------------------------enter students' score\n\n");
    printf("2-----------------------------display student's score\n\n");
    printf("3------------------display the condition of the class\n\n");
    printf("4--------------------------modify the student's score\n\n");
    printf("5---------------modify the information of the student\n\n");
    printf("6------------------------display the statistical data\n\n");
    printf("0------------------------------------------------exit\n\n");
    printf("=====================================================\n\n");
    printf("please enter your select:");
    scanf("%d",&a);
    return a;
}

infor *loadfile()
{
    infor *p,*s,*head;
    int i;
    FILE *fp;
    fp=fopen("SI.txt","r");
    head=(infor*)malloc(sizeof(infor));
    p=head;
    do
    {
        s=(infor*)malloc(sizeof(infor));
        fscanf(fp,"%s%s",p->num,p->name);
        for(i=0;i<10;i++)
        {
            fscanf(fp,"%d",&(p->score[i]));
        }

        s->next=NULL;
        p->next=s;
        p=s;
    }while(!feof(fp));

    fclose(fp);
    return head;
}


void displayscore(infor *head)
{
    infor *p;
    int i,number;
    p=head;
    //clrscr();
    printf("\nPlease enter the number of the student:");
    scanf("%d",&number);
    while(1)
    {
        if(number==atoi(p->num))
        {
            printf("The information of the student:\n\n");
            printf("%s   %s\n\n",p->num,p->name);
            for(i=0;i<10;i++)
            printf("SCORE %d: %d\n\n",i+1,p->score[i]);
            getch();
            break;
        }
        p=p->next;
        if(p->next==NULL)
        {
            printf("Sorry!the student hasn't been found!\n");
            printf("Please make sure you have got the right number of the student!");
            p=head;
            getch();
            //clrscr();
            printf("\nPlease enter the number of the student(ENTER 0 TO EXIT):");
            scanf("%d",&number);
            if(number==0)
                break;
        }
    }
}

void savescore(infor *head)
{
    infor *p;
    FILE *fp;
    int i;
    p=head;
    fp=fopen("SI.txt","w");
    do
    {
        fprintf(fp,"%s %s ",p->num,p->name);
        for(i=0;i<10;i++)
            fprintf(fp,"%d ",p->score[i]);
        fprintf(fp,"\n");
        p=p->next;
    }while(p->next!=NULL);
    fclose(fp);
}

void loadscore(infor *head)  //录入成绩
{
    infor *p;
    int number,time;
    p=head;
    //clrscr();
    printf("\nPlease enter the number of the student:");
    scanf("%d",&number);
    while(1)
    {

        if(number==atoi(p->num))
        {
            printf("The information of the student:\n\n");
            printf("%s     %s\n\n",p->num,p->name);
            printf("Which time of the score do you want to change?\n\n");
            scanf("%d",&time);
            printf("Please enter the score:");
            scanf("%d",&(p->score[time-1]));

            break;
        }
        p=p->next;
        if(p->next==NULL)
        {
            printf("Sorry!The student hasn't been found!\n");
            printf("Please make sure you have got the right number of the student!");
            p=head;
            getch();
            //clrscr();
            printf("\nPlease enter the number of the student(ENTER 0 TO EXIT):");
            scanf("%d",&number);
            if(number==0)
                break;
        }
    }
    savescore(head);
}


void changescore(infor *head)
{
    infor *p;
    int number,time;
    p=head;
    //clrscr();
    printf("\nPlease enter the number of the student:");
    scanf("%d",&number);
    while(1)
    {

        if(number==atoi(p->num))
        {
            printf("The information of the student:\n\n");
            printf("%s     %s\n\n",p->num,p->name);
            printf("Which time of the score do you want to change?\n\n");
            scanf("%d",&time);
            getchar();
            printf("This student Score%d is %d.\n",time,p->score[time-1]);
            printf("Please enter the score:");
            scanf("%d",&(p->score[time-1]));
            break;
        }
        p=p->next;
        if(p->next==NULL)
        {
            printf("Sorry!The student hasn't been found!\n");
            printf("Please make sure you have got the right number of the student!");
            p=head;
            getch();
            //clrscr();
            printf("\nPlease enter the number of the student(ENTER 0 TO EXIT):");
            scanf("%d",&number);
            if(number==0)
                break;
        }
    }
    savescore(head);
}

void displayclass(infor *head)
{
    infor *p;
    int i;
    char classnum[10];
    p=head;
    //clrscr();
    printf("\nPlease enter the number of the class:");
    scanf("%s",classnum);
    printf("\nThe information of the class:\n");
    do
    {
        if(strncmp(classnum,p->num,6)==0)
        {
            printf("%s  %s\n",p->num,p->name);
            for(i=0;i<10;i++)
                printf("%d ",p->score[i]);
            printf("\n\n");

        }
        p=p->next;

    }while(p->next!=NULL);
    getch();
}

void changeinfor(infor *head)
{
    infor *p;
    int number;
    p=head;
    //clrscr();
    printf("\nPlease enter the number of the student:");
    scanf("%d",&number);
    getchar();
    while(1)
    {

        if(number==atoi(p->num))
        {
            printf("The information of the student:\n\n");
            printf("%s     %s\n\n",p->num,p->name);
            printf("Please enter the new information(NUMBER NAME):\n");
            scanf("%s%s",p->num,p->name);
            break;
        }
        p=p->next;
        if(p->next==NULL)
        {
            printf("Sorry!The student hasn't been found!\n");
            printf("Please make sure you have got the right number of the student!");
            p=head;
            getch();
            //clrscr();
            printf("\nPlease enter the number of the student(ENTER 0 TO EXIT):");
            scanf("%d",&number);
            if(number==0)
                break;
        }
    }
    savescore(head);
}
void main();
void fullmark(infor *head)
{
    infor *p;
    int time;
    p=head;

    printf("Please enter which time you want to know:");
    scanf("%d",&time);
    while(1)
    {
        if(time>10||time<1)
        {
            printf("\nSorry!the time is between 1 to 10\n");
            printf("\nPlease enter which time you want to know:");
            scanf("%d",&time);
            continue;
        }
        else
        {
            do
            {
                if(p->score[time-1]==100)
                    printf("%s   %s\n\n",p->num,p->name);
                p=p->next;
            }while(p->next!=NULL);
            getch();
            break;
        }
    }
}
void lowmark(infor *head)
{
    infor *p;
    int time;
    p=head;

    printf("Please enter which time you want to know:");
    scanf("%d",&time);
    while(1)
    {
        if(time>10||time<1)
        {
            printf("\nSorry!the time is between 1 to 10\n");
            printf("\nPlease enter which time you want to know:");
            scanf("%d",&time);
            continue;
        }
        else
        {
            do
            {
                if(p->score[time-1]<=60)
                    printf("%s   %s\n\n",p->num,p->name);
                p=p->next;
            }while(p->next!=NULL);
            getch();
            break;
        }
    }
}
void average(infor *head)
{
    infor *p;
    int time,sum=0,i=0;
    char classnum[10];
    p=head;
    printf("\nPlease enter the number of the class:");
    scanf("%s",classnum);
    printf("\nPlease enter which time you want to know:");
    scanf("%d",&time);
    do
    {
        if(strncmp(classnum,p->num,6)==0)
        {
            sum=sum+(p->score[time-1]);
            i++;
        }
        p=p->next;

    }while(p->next!=NULL);
    printf("THE AVERAGE OF THE CLASS IS:%d",sum/i);
    getch();
}
void stats(infor *head)
{

    int a;

    while(1)
    {
            //clrscr();
        printf("==============================================\n\n");
        printf("1---------------display the full mark  student\n\n");
        printf("2------------display the low mark[<60] student\n\n");
        printf("3-------------display the average of the class\n\n");
        printf("0----------------------return to the main menu\n\n");
        printf("Please enter the function number:");
        scanf("%d",&a);
        switch(a)
        {   
        case 1:
            fullmark(head);
            continue;
        case 2:
            lowmark(head);
            continue;
        case 3:
            average(head);
            continue;
        case 0:
            main();
        default:
            //clrscr();
            printf("\nSorry!The function you have chosen hasn't been built!\n");
            printf("Press any key to return to the menu!");
            getch();
            continue;
        }
    }
}

void main(void)
{
    int select;
    infor *head;

    head=loadfile();

    while(1)
    {
        select=menu();
        switch(select)
        {
        case 1:
        loadscore(head);
        continue;
        case 2:
        displayscore(head);
        continue;
        case 3:
        displayclass(head);
        continue;
        case 4:
        changescore(head);
        continue;
        case 5:
        changeinfor(head);
        continue;
        case 6:
        stats(head);
        continue;
        case 0:
        exit(0);
        default:
        //clrscr();
        printf("\nSorry!The function you have chosen hasn't been built!\n");
        printf("Press any key to return to the menu!");
        getch();
        continue;
        }
    }
    getch();
}