typedef struct student{
     char name[MAX];
     int num[MAX];
     char sex[MAX];
     int chinese;
     int mathematic;
     int english;
     int computer;
     struct student *next;
    }

程序代码

#include"stdio.h"
#include"stddef.h"
#include"stddef.h"
#include"string.h"
#define MAX 10
typedef struct student{                 /*定义结构体*/
     char name[MAX];                    /*姓名*/
     int num[MAX];                      /* 学号*/
     char sex[MAX];                     /*性别*/
     int chinese;                       /*语文*/
     int mathematic;                    /* 数学*/
     int english;                       /*英语*/
     int computer;                      /*计算机*/
     struct student *next;              /*结构体指针*/
    }stu;
stu *head;                              /*头指针*/
void print()                            /*显示或打印函数*/
    {
        system("cls");
        printf("\t\t\tScore Manage System\n");      /*成绩管理系统*/           
        printf("<1>Enter Record\t");                /*输入数据*/
        printf("<2>Display\t");                     /*显示*/
        printf("<3>Insert\t");                      /*插入数据*/
        printf("<4>Quest\t");                       /*访问数据*/
        printf("<5>Update\t");                      /*以前数据*/
        printf("<6>Save\t");                        /*保留数据*/
        printf("<7>Fresh\t");                       /*更新数据*/
        printf("<8>Chinese Average\t");             /*语文平均成绩*/
        printf("<9>Math Average\t");                /*数学平均成绩*/
        printf("<10>English Average\t");            /*英语平均成绩*/
        printf("<11>Computer Average\t");           /*计算机平均成绩*/
        printf("<12>Quit\t\n");                     /*退出*/
         }

void cin(stu *p1)                             /*输入相关数据的函数*/
 { printf("Enter name:\n");
    scanf("%s",&p1->name);
   printf("Enter num:\n");
     scanf("%d",&p1->num);
    printf("Enter sex:\n");
     scanf("%s",&p1->sex);
   printf("Enter score:\n");
   printf("Enter chinese:\n");
     scanf("%d",&p1->chinese);
  printf("Enter math:\n");
    scanf("%d",&p1->mathematic);
  printf("Enter English:\n");
   scanf("%d",&p1->english);
  printf("Enter Computer:\n");
   scanf("%d",&p1->computer);
  }
 stu *cindata()                              /*其他数据是否继续输入的函数*/
 {  stu *p1,*p2;
   int i=1;
  char ch;
  p1=(stu *)malloc(sizeof(stu));
    head=p1;
  while(i)
    {
       cin(p1);
    printf("Do you Want to Continue?yes or no");       /*是否继续输入数据*/
     ch=getchar();
      ch=getchar();
    if(ch=='n'||ch=='N')
      { i=0;
  p1->next=NULL;
       }
    else
      { p2=p1;
        p1=(stu *)malloc(sizeof(stu));
        p2->next=p1;
      }
     }
    return(p1->next);
}

stu *lookdata(stu *p1)                                /*查看数据的函数*/
 {
     while(p1!=NULL)
       { printf("Num:%d\t",p1->num);
         printf("Name:%s\t",p1->name);
         printf("Sex:%s\t",p1->sex);
         printf("\n");
         printf("Chinese:%d\t",p1->chinese);
         printf("Math:%d\t",p1->mathematic);
         printf("English:%d\t",p1->english);
         printf("Computer:%d\t",p1->computer);
         printf("\n");
         p1=p1->next;
        }
     return p1;
   }

void insert()                               /*通过比较学号来插入数据的函数*/
 { stu *p1,*p3,*p2;
   char ch;
   p1=head;
   p3=(stu *)malloc(sizeof(stu));

    p3->next=NULL;
   if(head==NULL){ head=p3; return;}
   cin(p3);
   while(p1!=NULL&&(p1->numnum))        /*通过学号的比较来插入*/
     {  p2=p1;p1=p1->next;}
   if(p2==head) {p3->next=head; head=p3; return;}
   p3->next=p1;
   p2->next=p3;

 }