#include<stdio.h>
#include<stdlib.h>
#include<string.h>
struct Student
{
   char Name[10];
   float Score[3];
   float Total;
   float Ave;
};
typedef struct Node
{
   struct Student st;
   struct Node *pNext;
}NODE, *PNODE;

PNODE InputStudent(void);
void OutputStudent(PNODE pHead);
void DeleteStudent(PNODE pHead);
void FindStudent(PNODE pHead);
void ChangeStudent(PNODE pHead);
void InsertStudent(PNODE pHead);
void ScortByChinese(PNODE pHead);
void ScortByMath(PNODE pHead);
void ScortByEnglish(PNODE pHead);
void ScortByTotal(PNODE pHead);
int main()
{
   printf("Please press any button to enter the student management system");
   getchar();
   system("cls");

   printf("********************************************Menu*********************************************\n");

   printf("* Please select the command to operate *\n");

   printf("*********************************************************************************************\n");

   printf("*************** 1 Input student information ***********************\n");

printf("*************** 2 Output student information ***********************\n");

printf("*************** 3 Delete student information ***********************\n");

printf("*************** 4 Find student information ***********************\n");

printf("*************** 5 Change student information ***********************\n");

printf("*************** 6 insert student information ***********************\n");

printf("*************** 7 Sort Chinese score ***********************\n");

printf("*************** 8 Sort Math score ***********************\n");

printf("*************** 9 Sort English score ***********************\n");

printf("*************** 10 Sort Score ***********************\n");

   printf("*********************************************************************************************\n");
   int Item;
   PNODE pHead = NULL;
   while(1)
   {
       printf("choose:");
       scanf("%d",&Item);
       system("cls");
       switch(Item)
       {
       case 1:
           {
               pHead = InputStudent();
           }
           break;
           case 2:
           {
               OutputStudent(pHead);
           }
           break;
           case 3:
           {
               DeleteStudent(pHead);
           }
           break;
           case 4:
           {
               FindStudent(pHead);
           }
           break;
           case 5:
           {
               ChangeStudent(pHead);
           }
           break;
           case 6:
           {
               InsertStudent(pHead);
           }
           break;
           case 7:
           {
               ScortByChinese(pHead);
               OutputStudent(pHead);
           }
           break;
           case 8:
           {
               ScortByMath(pHead);
               OutputStudent(pHead);
           }
           break;
           case 9:

           {
               ScortByEnglish(pHead);
               OutputStudent(pHead);
           }

           break;
           case 10:
           {
               ScortByTotal(pHead);
               OutputStudent(pHead);
           }
           break;
           default:
           break;
       }
   }
   system("pause");
}
PNODE InputStudent(void)
{
   int len;
   NODE stu;
   PNODE pHead = (PNODE)malloc(sizeof(NODE));
   if(NULL == pHead)
   {
       printf("error!   ");
       exit(-1);
   }
   PNODE pTail = pHead;
   pTail -> pNext = NULL;
   int i;
   for(i = 0;;i ++)
   {
       system("cls");

       printf("Please enter no%d student's name:", i+1);
       scanf("%s", stu.st.Name);
       if(strcmp(stu.st.Name,"quit")==0)
       {
           break;
       }
       printf("Please enter no%d student's Chinese score Math score and English score:", i+1);
       scanf("%f %f %f", &stu.st.Score[0],&stu.st.Score[1],&stu.st.Score[2]);
       stu.st.Total = stu.st.Score[0] + stu.st.Score[1] + stu.st.Score[2];
       stu.st.Ave = stu.st.Total / 3.0f;
       PNODE pNew = (PNODE)malloc(sizeof(NODE));
       if(NULL == pNew)
       {
           printf("error!   ");
           exit(-1);
       }

       pNew -> st = stu.st;
       pTail -> pNext = pNew;
       pNew -> pNext = NULL;
       pTail = pNew;

   }
   return pHead;
}

void OutputStudent(PNODE pHead)
{
   PNODE p = pHead -> pNext;
   printf("name       Chinese       Math       English       Total       Ave \n");

   while (NULL != p)
   {
       printf("%s       %g       %g       %g       %g       %g       \n", p->st.Name, p->st.Score[0], p->st.Score[1], p->st.Score[2], p->st.Total, p->st.Ave);

       p = p -> pNext;
   }

}
void DeleteStudent(PNODE pHead)
{
   PNODE p = pHead;
   int i = 0;
   int pos;
   printf("please enter the number of student you need to delete:");
   scanf("%d",&pos);
   while(NULL != p -> pNext && i< pos - 1)
   {
       p = p -> pNext;
       i++;
   }
   if(NULL == p -> pNext || i > pos -1)
   {
       printf("no find！\n");
       return;
   }
   PNODE q = p -> pNext;
   p -> pNext = q -> pNext;
   free(q);
   q == NULL;
   printf("Successfully deleted");

}
void FindStudent(PNODE pHead)
{
   char Name[10];
   printf("enter the name you want to find:");
   scanf("%s",Name);
   PNODE p = pHead -> pNext;
   while(NULL != p)
   {
       if(0 == strcmp(Name,p->st.Name))
       {
           printf("%s       %g       %g       %g       %g       %g\n",p->st.Name, p->st.Score[0], p->st.Score[1], p->st.Score[2], p->st.Total, p->st.Ave);
       }
       p = p -> pNext;
   }
}
void ChangeStudent(PNODE pHead)
{
   char Name[10];
   printf("please enter the name of student you need to change");
   scanf("s%",&Name);

   PNODE p = pHead -> pNext;
   while(NULL != p)
   {
       if(0 == strcmp(Name,p -> st.Name))
       {
           printf("Student information before modification \n");
           printf("name       Chinese       Math       English       Total       Ave \n");
           printf("%s       %g       %g       %g       %g       %g   ", p->st.Name, p->st.Score[0], p->st.Score[1], p->st.Score[2], p->st.Total, p->st.Ave);
           system("pause");
           system("cls");
           printf("please enter new name:");
           scanf("%s", p->st.Name);

printf("plsase enter new Chinese score:");
scanf("%f", &p->st.Score[0]);

printf("plsase enter new Chinese score:");
scanf("%f", &p->st.Score[1]);

           printf("plsase enter new Chinese score:");
           scanf("%f", &p->st.Score[2]);
           p->st.Total = p->st.Score[0] + p->st.Score[1] + p->st.Score[2];
           p->st.Ave = p->st.Total / 3.0f;
           break;
       }
       p = p -> pNext;

   }

}

void InsertStudent(PNODE pHead)
{
   PNODE p = pHead;
   int i = 0;
   struct Student stu;
   while(NULL != p)
   {
       p = p -> pNext;
       i++;
   }
   if(NULL == pHead)
   {
       printf("error");
       return;
   }
   printf("please enter student's name:");
   scanf("%s",stu.Name);

   printf("Please enter student's Chinese score:");
   scanf("%f",&stu.Score[0]);

   printf("Please enter student's Math score:");
   scanf("%f",&stu.Score[1]);

   printf("Please enter student's English score:");
   scanf("%f",&stu.Score[2]);

   stu.Total = stu.Score[0] + stu.Score[1] + stu.Score[2];
   stu.Ave = stu.Total / 3.0f;

   PNODE pNew = (PNODE)malloc(sizeof(NODE));
   if(NULL == pNew)
   {
       printf("error!\n");
       exit(-1);
   }
   pNew -> st = stu;
   PNODE q = p-> pNext;
   p -> pNext = pNew;
   pNew -> pNext = q;
}
void ScortByChinese(PNODE pHead)
{
   PNODE p, q;
   NODE temp;
   for(p = pHead -> pNext; NULL != p; p = p -> pNext)
   {
       for(q = p -> pNext; NULL != q; q = q -> pNext)
       {
           if(p -> st.Score[0] < q -> st.Score[0])
           {
               temp.st = p->st;
               p->st = q->st;
               q->st = temp.st;
           }
       }
   }
}
void ScortByMath(PNODE pHead)
{
   PNODE p, q;
   NODE temp;
   for(p = pHead -> pNext; NULL != p; p = p -> pNext)
   {
       for(q = p -> pNext; NULL != q; q = q -> pNext)
       {
           if(p -> st.Score[1] < q -> st.Score[1])
           {
               temp.st = p->st;
               p->st = q->st;
               q->st = temp.st;
           }
       }
   }
}
void ScortByEnglish(PNODE pHead)
{
   PNODE p, q;
   NODE temp;
   for(p = pHead -> pNext; NULL != p; p = p -> pNext)
   {
       for(q = p -> pNext; NULL != q; q = q -> pNext)
       {
           if(p -> st.Score[2] < q -> st.Score[2])
           {
               temp.st = p->st;
               p->st = q->st;
               q->st = temp.st;
           }
       }
   }
}
void ScortByTotal(PNODE pHead)
{
   PNODE p, q;
   NODE temp;
   for(p=pHead->pNext; NULL != p; p=p->pNext)
   {
       for(q=p->pNext; NULL !=q; q=q->pNext)
       {
           if(p->st.Total < q->st.Total)
           {
               temp.st = p->st;
               p->st = q->st;
               q->st = temp.st;
           }

}

}

}

void LoadInf(PNODE pHead)
{
   PNODE *p = pHead;
   PNODE *q;
   FILE* file = fopen("./Information.dat", "rb");
   if (!file)
   {
       printf("Failer！");
       return ;
   }
   q = (PNODE *)malloc(sizeof(PNODE));

   fread(q, sizeof(PNODE), 1, file);
   while (!feof(file))
   {
       p -> pNext = q;
       p = q;
       q = (PNODE *)malloc(sizeof(PNODE));
       fread(q, sizeof(PNODE), 1, file);
   }
   p->pNext = NULL;
   fclose(file);
}
void SaveInf(PNODE pHead)
{
   PNODE *p = pHead -> pNext;
   int flag;
   FILE* file = fopen("./Information.dat", "wb");
   if (!file)
   {
       printf("Failer！");
       return;
   }
   while (p != NULL)
   {
       flag = fwrite(p, sizeof(PNODE), 1, file);
       if (flag != 1)
       {
           break;
       }
       p = p -> pNext;
   }
   fclose(file);
}

代码在这

饭团子君v

pycharm 没有package怎么办

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