学生成绩管理系统

缺乏、安全感 2022-06-04 02:12 232阅读 0赞

**数据结构链表实现学生成绩管理系统**

//consts.h

#include<string.h>
    #include<malloc.h>
    #include<stdlib.h>
    #include<stdio.h>
    #include<limits.h>
    #include<io.h>
    #include<math.h>
    #include<process.h>
    
    #define TRUR 1
    #define FALSE 0
    #define OK 1
    #define ERROR -1
    #define INFEASIBLE -1

//st.cpp

#ifndef MY_H_FILE 
    #define MY_H_FILE 
    #include"consts.h"
    #endif 
    
    typedef struct node
    {
        char num[110];
        int shuxue;
        int yingyu;
        int yuwen;
        int wuli;
        int huaxue;
        struct node *next;
    }LinkList;
    
    void CreateLinkList(LinkList *head,int *n)
    {
        char num[110];
        int score,score1,score2,score3,score4;
        int i=1;
        LinkList *p=head;
        LinkList *s;
        printf("请输入学号，输入0结束输入：\n");
        scanf("%s",&num);
        while(1)
        {
            if(strcmp(num,"0")==0)
                break;
            s=(LinkList*)malloc(sizeof(LinkList));
            strcpy(s->num,num);
            printf("请输入数学成绩：\n");
            scanf("%d",&score);
            s->shuxue=score;
            printf("请输入英语成绩：\n");
            scanf("%d",&score1);
            s->yingyu=score1;
            printf("请输入语文成绩：\n");
            scanf("%d",&score2);
            s->yuwen=score2;
            printf("请输入物理成绩：\n");
            scanf("%d",&score3);
            s->wuli=score3;
            printf("请输入化学成绩：\n");
            scanf("%d",&score4);
            s->huaxue=score4;
            p->next=s;
            p=s;
            s->next=NULL;
            *n=*n+1;
            printf("请输入学生的学号，输入0结束输入：\n");
            scanf("%s",&num);
        }
    }
    
    void InsertStu(LinkList *head,char num[],int *n)
    {
        LinkList *p;
        LinkList *s;
        int score,score1,score2,score3,score4;
        int flag=0;
        printf("请输入数学成绩：\n");
        scanf("%d",&score);
        printf("请输入英语成绩：\n");
        scanf("%d",&score1);
        printf("请输入语文成绩：\n");
        scanf("%d",&score2);
        printf("请输入物理成绩：\n");
        scanf("%d",&score3);
        printf("请输入化学成绩：\n");
        scanf("%d",&score4);
        p=head;
        while(p->next!=NULL)
        {
            if(strcmp(p->next->num,num)==0)
            {
                flag=1;break;
            }
            p=p->next;
        }
        if(flag==1)
        {
            p->next->shuxue=score;  
            p->next->yingyu=score1;
            p->next->yuwen=score2;
            p->next->wuli=score3;
            p->next->huaxue=score4;
            }
        else
        {
            s=(LinkList*)malloc(sizeof(LinkList));
            strcpy(s->num,num);
            s->shuxue=score;
            s->yingyu=score1;
            s->yuwen=score2;
            s->wuli=score3;
            s->huaxue=score4;
            p->next=s;
            p=s;
            s->next=NULL;   
            *n=*n+1;
        }
    }
    
    int DeleteStu(LinkList *head,char num[],int *n)
    {
        LinkList *p=head;
        LinkList *s;
        if(p->next==NULL)
        {
            printf("表中没有任何记录。\n");
            return ERROR;
        }
        else
        {
            while(p!=NULL)
            {
                s=p->next;
                if(s!=NULL)
                {
                    if(strcmp(s->num,num)==0)
                    {
                        p->next=s->next;
                        *n=*n-1;
                        break;
                    }
                }
                p=p->next;
            }
            printf("表中已经没有该学生记录。\n");
            return ERROR;
        }
    }
    
    void DisplayStu(LinkList *head)
    {
        LinkList *h=head->next;
        printf("学号 数学 英语 语文 物理 化学\n");
        while(h!=NULL)
        {
            printf("%s\t%d\t%d\t%d\t%d\t%d\n",h->num,h->shuxue,h->yingyu,h->yuwen,h->wuli,h->huaxue);
            h=h->next;
        }
    }
    
    
    int main()
    {
        LinkList *head;
        char num[110];
        int flag=0;
        int n=0;
        head=(LinkList*)malloc(sizeof(LinkList));
        head->next=NULL;
        CreateLinkList(head,&n);
        printf("学生总数为%d\n",n);
        if(head->next!=NULL)
            DisplayStu(head);
        printf("\n");
        printf("请输入要插入的学生的学号，以0结束：\n");
        scanf("%s",&num);
        while(1)
        {
            if(strcmp(num,"0")==0) break;
            InsertStu(head,num,&n);
            printf("学生总数为%d\n",n);
            DisplayStu(head);
            scanf("%s",&num);
        }
    
        printf("请输入要删除的学生的学号，以0结束：\n");
        scanf("%s",&num);
        while(1)
        {
            if(strcmp(num,"0")==0) break;
            flag=DeleteStu(head,num,&n);
            printf("学生总数为%d\n",n);
            DisplayStu(head);
            scanf("%s",&num);
        }
        return 0;
    }