学生信息管理系统（c语言版）

大一下C语言要交课程设计，于是就写了一个学生信息管理系统，仅供参考

学生信息包括姓名，学号，性别，年龄和各科成绩，可根据需要自行修改添加

包括增、删、改查、查看所有、保存、清空7个功能，每个功能都封装成一个函数

保存功能是将所添加的信息保存到文件中

使用链表存储，包括文件操作，没有学生数量限制，各种信息由结构体封装

各种情况如学号错误、学生不存在等考虑比较完备

缺陷是界面没有优化，可以自行优化

部分运行截图如下：

 

 完整代码如下：文章来源地址https://www.toymoban.com/news/detail-532952.html

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
typedef struct scores{
    int math;
    int physics;
    int English;
    int python;
    int c;
    int sum;
    int average;
}scores;
typedef struct students{
    char name[10];
    char id[15];
    char sex[5];
    int age;
    scores score;
}students;
struct node{
    students student;
    struct node* next;
};
struct node *head;
void menu(){
    printf("学生信息管理系统\n");
    printf("1、添加信息\n");
    printf("2、删除信息\n");
    printf("3、修改信息\n");
    printf("4、查找信息\n");
    printf("5、查看所有学生信息\n");
    printf("6、清空信息\n");
    printf("7、保存信息\n");
    printf("0、退出系统\n");
}
void add(){
    struct node *new_node=(struct node*)malloc(sizeof(struct node));
    new_node->next=NULL;
    struct node* i=head;
    printf("请输入学生姓名:\n");
    scanf("%s",new_node->student.name);
    printf("请输入学生学号:\n");
    scanf("%s",new_node->student.id);
    while(i!=NULL){
        if(strcmp(i->student.id,new_node->student.id)==0){
            printf("该学生已存在!\n");
            return;
        }
        i=i->next;
    }
    printf("请输入学生性别:\n");
    scanf("%s",new_node->student.sex);
    printf("请输入学生年龄:\n");
    scanf("%d",&new_node->student.age);
    printf("请输入学生成绩:\n");
    printf("高数:");
    scanf("%d",&new_node->student.score.math);
    printf("物理:");
    scanf("%d",&new_node->student.score.physics);
    printf("英语:");
    scanf("%d",&new_node->student.score.English);
    printf("python:");
    scanf("%d",&new_node->student.score.python);
    printf("c语言:");
    scanf("%d",&new_node->student.score.c);
    new_node->student.score.sum=
    new_node->student.score.math+
    new_node->student.score.physics+
    new_node->student.score.English+
    new_node->student.score.python+
    new_node->student.score.c;

    new_node->student.score.average=
    new_node->student.score.sum/5.0;
    
    struct node *t=head;
    if(head->next==NULL){
        head->next=new_node;
        new_node->next=NULL;
    }
    else{
        while(t->next!=NULL&&t->next->student.score.sum>new_node->student.score.sum){
            t=t->next;
        }
        if(t->next==NULL){
            t->next=new_node;
            new_node->next=NULL;
        }
        else{
            new_node->next=t->next;
            t->next=new_node;
        }
    }
    printf("添加成功!\n");
}
void delete(){
    struct node* t=head,*f;
    char d_id[15];
    printf("请输入你想要删除的学生学号:\n");
    scanf("%s",d_id);
    while(t->next!=NULL){
        if(strcmp(t->next->student.id,d_id)==0){
            if(t->next->next==NULL){
                free(t->next);
                t->next=NULL;
            }
            else{
                f=t->next;
                t->next=f->next;
                free(f);
            }
            printf("删除成功!\n");
            return;
        }
        t=t->next;
    }
    if(t->next==NULL){
        printf("该学生不存在!\n");
    }
}
void change(){
    struct node* t=head->next;
    char c_id[15];
    printf("请输入你要修改的学生学号\n");
    scanf("%s",c_id);
    while(t!=NULL){
        if(strcmp(t->student.id,c_id)==0){
            printf("请输入学生姓名:\n");
            scanf("%s",t->student.name);
            printf("请输入学生学号:\n");
            scanf("%s",t->student.id);
            printf("请输入学生性别:\n");
            scanf("%s",t->student.sex);
            printf("请输入学生年龄:\n");
            scanf("%d",&t->student.age);
            printf("请输入学生成绩:\n");
            printf("高数:");
            scanf("%d",&t->student.score.math);
            printf("物理:");
            scanf("%d",&t->student.score.physics);
            printf("英语:");
            scanf("%d",&t->student.score.English);
            printf("python:");
            scanf("%d",&t->student.score.python);
            printf("c语言:");
            scanf("%d",&t->student.score.c);
            t->student.score.sum=
            t->student.score.math+
            t->student.score.physics+
            t->student.score.English+
            t->student.score.python+
            t->student.score.c;

            t->student.score.average=
            t->student.score.sum/5.0;
            printf("修改成功!\n");
            return;
        }
        t=t->next;
    }
    printf("该学生不存在!\n");
}
void search(){
    struct node* t=head->next;
    printf("请输入你要查找的学生学号:\n");
    char s_id[15];
    scanf("%s",s_id);
    while(t!=NULL){
        if(strcmp(t->student.id,s_id)==0){
            printf("姓名:%s\n",t->student.name);
            printf("学号:%s\n",t->student.id);
            printf("性别:%s\n",t->student.sex);
            printf("年龄:%d\n",t->student.age);
            printf("成绩:\n");
            printf("高数:%d\n",t->student.score.math);
            printf("物理:%d\n",t->student.score.physics);
            printf("英语:%d\n",t->student.score.English);
            printf("python:%d\n",t->student.score.python);
            printf("c语言:%d\n",t->student.score.c);
            printf("总分:%d\n",t->student.score.sum);
            printf("平均分:%d\n",t->student.score.average);
            return;
        }
        t=t->next;
    }
    printf("该学生不存在!\n");
}

void show_all(){
    struct node* t=head->next;
    
    if(head->next==NULL){
        printf("暂无学生信息!\n");
        return;
    }
    printf("所有学生信息:\n\n");
    while(t!=NULL){
        printf("姓名:%s\n",t->student.name);
        printf("学号:%s\n",t->student.id);
        printf("性别:%s\n",t->student.sex);
        printf("年龄:%d\n",t->student.age);
        printf("成绩:\n");
        printf("高数:%d\n",t->student.score.math);
        printf("物理:%d\n",t->student.score.physics);
        printf("英语:%d\n",t->student.score.English);
        printf("python:%d\n",t->student.score.python);
        printf("c语言:%d\n",t->student.score.c);
        printf("总分:%d\n",t->student.score.sum);
        printf("平均分:%d\n",t->student.score.average);
        printf("\n");
        t=t->next;
    }
}
void clear(){ 
    if(head->next==NULL)
        printf("暂无学生信息!\n");
    else{
        struct node* pr=head->next,*la=pr->next;
        head->next=NULL;
        while(la!=NULL){
            free(pr);
            pr=la;
            la=la->next;
        }
        free(pr);
        printf("清空完成!\n");
    }
    
}
void save(){
    FILE* f;
    f=fopen("students system.txt","w");
    if(f==NULL){
        printf("保存失败!\n");
        return;
    }
    struct node* t=head->next;
    if(head->next==NULL)
        printf("暂无学生信息!\n");
    else{
        while(t!=NULL){
            fprintf(f,"姓名:%s\n",t->student.name);
            fprintf(f,"学号:%s\n",t->student.id);
            fprintf(f,"性别:%s\n",t->student.sex);
            fprintf(f,"年龄:%d\n",t->student.age);
            fputs("成绩:\n",f);
            fprintf(f,"高数:%d\n",t->student.score.math);
            fprintf(f,"物理:%d\n",t->student.score.physics);
            fprintf(f,"英语:%d\n",t->student.score.English);
            fprintf(f,"python:%d\n",t->student.score.python);
            fprintf(f,"c语言:%d\n",t->student.score.c);
            fprintf(f,"总分:%d\n",t->student.score.sum);
            fprintf(f,"平均分:%d\n",t->student.score.average);
            fputs("\n",f);
            t=t->next;
        }
        printf("保存成功!\n");
    }
    fclose(f);
}
void Input(){
    int choice;
    scanf("%d",&choice);
    switch (choice)
    {
    case 0:
        exit(0);
        break;
    case 1:
        system("cls");
        printf("添加学生信息:\n");
        add();
        system("pause");
        system("cls");
        break;
    case 2:
        system("cls");
        printf("删除学生信息:\n");
        delete();
        system("pause");
        system("cls");
        break;
    case 3:
        system("cls");
        printf("修改学生信息:\n");
        change();
        system("pause");
        system("cls");
        break;
    case 4:
        system("cls");
        printf("查找学生信息:\n");
        search();
        system("pause");
        system("cls");
        break;
    case 5:
        system("cls");
        show_all();
        system("pause");
        system("cls");
        break;
    case 6:
        system("cls");
        clear();
        system("pause");
        system("cls");
        break;
    case 7:
        system("cls");
        save();
        system("pause");
        system("cls");
        break;
    default:
        system("cls");
        break;
    }
}
int main(){
    head=(struct node*)malloc(sizeof(struct node));//头节点
    head->next=NULL;
    while(1){
    menu();
    Input();
    }
    return 0;
}

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