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标题:我这程序为什么出错,难道文件文件函数不是这用的么?()
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bianchenyang
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我这程序为什么出错,难道文件文件函数不是这用的么?()
#include<stdio.h>
#include<string.h>
struct Student
{
    int number;
    char name[20];
    float score;
    struct Student *next;
};
void Display();
void Choice();
struct Student *CreateLinkList();
void PrintScoreList();
void SearchStudent();
void DeleteStudent();
void AddStudent();
int CountNode();
void AmendInformation();
void InserStudent(int n);
void Array();
int main()
{
    Display();
    Choice();
    return 0;
}
struct Student *CreateLinkList()
{
    int number;
    FILE *p=fopen("d:\\student.mdb","w");
    struct Student *linklist1,*head,*linklist2;
    linklist1=(struct Student*)malloc(sizeof(struct Student));
    head=linklist1;
    linklist2=linklist1;
    printf("Input student's nubmer(input 0 to end):");
    scanf("%d",&number);
    while(number!=0)
    {
        linklist2=(struct Student*)malloc(sizeof(struct Student));
        linklist2->number=number;
        printf("Input student's name:");
        scanf("%s",linklist2->name);
        printf("Input student's score:");
        scanf("%f",&linklist2->score);
        linklist1->next=linklist2;
        linklist1=linklist1->next;
        printf("Input student's nubmer(input 0 to end):");
        scanf("%d",&number);
    }
    linklist2->next=NULL;
    fwrite(&head,sizeof(struct Student),1,p);
    fclose(p);
    printf("\n");
    return head;
}
void PrintScoreList()
{
    struct Student *head;
    FILE *p=fopen("d:\\student.mdb","r");
    fread(&head,sizeof(struct Student),1,p);
    head=head->next;
    printf("Number  Name  Score\n");
    while(head!=NULL)
    {
        printf("%-8d%-6s%-5.2f\n",head->number,head->name,head->score);
        head=head->next;
    }
    fclose(p);
    printf("\n");
}
void SearchStudent()
{
    struct Student *head;
    FILE *p=fopen("d:\\student.mdb","r");
    int number;
    fread(&head,sizeof(struct Student),1,p);
    head=head->next;
    printf("Please input student's number to search:");
    scanf("%d",&number);
    while(head->number!=number)
    {
        head=head->next;
    }
    printf("Number  Name  Score\n");
    printf("%-8d%-6s%-5.2f\n",head->number,head->name,head->score);
    printf("\n");
    fclose(p);
}
void DeleteStudent()
{
    struct Student *head;
    FILE *p=fopen("d:\\student.mdb","r+");
    fread(&head,sizeof(struct Student),1,p);
    int number;
    struct Student *link1=head->next,*link2=head;
    printf("Please input student's nubmer to delete:");
    scanf("%d",&number);
    while(link1->number!=number)
    {
        link1=link1->next;
        link2=link2->next;
    }
    link2->next=link1->next;
    free(link1);
    fwrite(&head,sizeof(struct Student),1,p);
    fclose(p);
    printf("\n");
}
void AddStudent()
{
    struct Student *head;
    FILE *p=fopen("d:\\student.mdb","r+");
    fread(&head,sizeof(struct Student),1,p);
    struct Student *link=head;
    while(link->next!=NULL)
    {
        link=link->next;
    }
    link->next=CreateLinkList()->next;
    fwrite(&head,sizeof(struct Student),1,p);
    fclose(p);
    printf("\n");
}
int CountNode()
{
    struct Student *head;
    FILE *p=fopen("d:\\student.mdb","r");
    fread(&head,sizeof(struct Student),1,p);
    int count=0;
    head=head->next;
    while(head!=NULL)
    {
        count ++;
        head=head->next;
    }
    fclose(p);
    printf("\n");
    return count;
}
void InserStudent(int n)
{
    struct Student *head;
    FILE *p=fopen("d:\\student.mdb","r+");
    int i=1;
    struct Student *link,*temp;
    fread(&head,sizeof(struct Student),1,p);
    link=head;temp=CreateLinkList()->next;
    while(i++<n)
    {
        link=link->next;
    }
    temp->next=link->next;
    link->next=temp;
    fwrite(&head,sizeof(struct Student),1,p);
    fclose(p);
    printf("\n");
}
void AmendInformation()
{
    struct Student *head;
    FILE *p=fopen("d:\\student.mdb","r+");
    int number;
    fread(&head,sizeof(struct Student),1,p);
    head=head->next;
    printf("Please input student's number to amend information:\n");
    scanf("%d",&number);
    while(head->number!=number)head=head->next;
    printf("Number  Name  Score\n");
    printf("%-8d%-6s%-5.2f\n",head->number,head->name,head->score);
    printf("Please input name:");
    scanf("%s",head->name);
    printf("Input score:");
    scanf("%f",&head->score);
    printf("Number  Name  Score\n");
    printf("%-8d%-6s%-5.2f\n",head->number,head->name,head->score);
    printf("\n");
    fwrite(&head,sizeof(struct Student),1,p);
    fclose(p);
}
void Array()
{
    struct Student *head;
    FILE *p=fopen("d:\\student.mdb","r+");
    int i,j,length=CountNode(head);
    float score;
    int number;
    char name[20];
    fread(&head,sizeof(struct Student),1,p);
    head=head->next;
    for(i=0; i<length; i++)
    {
        for(j=i; j<length-1-i; j++)
        {
            if(head->score<head->next->score)
            {
                score=head->score;
                head->score=head->next->score;
                head->next->score=score;

                number=head->number;
                head->number=head->next->number;
                head->next->number=number;

                strcpy(name,head->name);
                strcpy(head->name,head->next->name);
                strcpy(head->next->name,name);
            }
            head=head->next;
        }
    }
    fwrite(&head,sizeof(struct Student),1,p);
    fclose(p);
}
void Display()
{
    printf("***********************************\n");
    printf("*       STUDENT DATA 2011         *\n");
    printf("***********************************\n");
    printf("*  A.Input student's information  *\n");
    printf("*  B.Output stdent information    *\n");
    printf("*  C.Rserch by input number       *\n");
    printf("*  D.Delete by input number       *\n");
    printf("*  E.Add student int the end      *\n");
    printf("*  F.Insert student               *\n");
    printf("*  G.Amend student information    *\n");
    printf("*  H.Array student information    *\n");
    printf("***********************************\n");
    printf("**          Y. Exit             ***\n");
    printf("***********************************\n");
}
void Choice()
{
    char ch;
    int n;
    struct Student *head;
    printf("Please choise function:");
    while(scanf("%c",&ch),ch!='Y'&&ch!='y')
    {
        switch(ch)
        {
        case 'A':
        case 'a':
            head=CreateLinkList();
            break;
        case 'b':
        case 'B':
            PrintScoreList(head);
            break;
        case 'c':
        case 'C':
            SearchStudent(head);
            break;
        case 'd':
        case 'D':
            DeleteStudent(head);
            break;
        case 'e':
        case 'E':
            AddStudent(head);
            break;
        case 'F':
        case 'f':
        {
            printf("please input the the position:");
            scanf("%d",&n);
            InserStudent(n);
        }
        break;
        case 'G':
        case 'g':
            AmendInformation(head);
            break;
        case 'H':
        case 'h':
        {
            Array(head);
            PrintScoreList(head);
        }
        break;
        }
        printf("Please choise function:");
    }
}
没有用文件函数之前没有错:
#include<stdio.h>
#include<string.h>
struct Student
{
 
   int number;
    char name[20];
    float score;
    struct Student *next;
};
void Display();
struct Student *CreateLinkList();
void PrintScoreList(struct Student *head);
void SearchStudent(struct Student *head);
void DeleteStudent(struct Student *head);
void AddStudent(struct Student *head);
int CountNode(struct Student *head);
void AmendInformation(struct Student *head);
void InserStudent(struct Student *head,int n);
void Array(struct Student *head);
int main()
{

    Display();
    Choice();
    return 0;
}
struct Student *CreateLinkList()
{
    int number;
    struct Student *linklist1,*head,*linklist2;
    linklist1=(struct Student*)malloc(sizeof(struct Student));
    head=linklist1;
    linklist2=linklist1;
    printf("Input student's nubmer(input 0 to end):");
    scanf("%d",&number);
    while(number!=0)
    {
        linklist2=(struct Student*)malloc(sizeof(struct Student));
        linklist2->number=number;
        printf("Input student's name:");
        scanf("%s",linklist2->name);
        printf("Input student's score:");
        scanf("%f",&linklist2->score);
        linklist1->next=linklist2;
        linklist1=linklist1->next;
        printf("Input student's nubmer(input 0 to end):");
        scanf("%d",&number);
    }
    linklist2->next=NULL;
    printf("\n");
    return head;
}
void PrintScoreList(struct Student *head)
{
    head=head->next;
    printf("Number  Name  Score\n");
    while(head!=NULL)
    {
        printf("%-8d%-6s%-5.2f\n",head->number,head->name,head->score);
        head=head->next;
    }
    printf("\n");
}
void SearchStudent(struct Student *head)
{
    int number;
    head=head->next;
    printf("Please input student's number to search:");
    scanf("%d",&number);
    while(head->number!=number)
    {
        head=head->next;
    }
    printf("Number  Name  Score\n");
    printf("%-8d%-6s%-5.2f\n",head->number,head->name,head->score);
    printf("\n");
}
void DeleteStudent(struct Student *head)
{
    int number;
    struct Student *link1=head->next,*link2=head;
    printf("Please input student's nubmer to delete:");
    scanf("%d",&number);
    while(link1->number!=number)
    {
        link1=link1->next;
        link2=link2->next;
    }
    link2->next=link1->next;
    free(link1);
    printf("\n");
}
void AddStudent(struct Student *head)
{
    struct Student *link=head;
    while(link->next!=NULL)
    {
        link=link->next;
    }
    link->next=CreateLinkList()->next;
    printf("\n");
}
int CountNode(struct Student *head)
{
    int count=0;
    head=head->next;
    while(head!=NULL)
    {
        count ++;
        head=head->next;
    }
    printf("\n");
    return count;
}
void InserStudent(struct Student *head,int n)
{
    int i=1;
    struct Student *link=head,*temp=CreateLinkList()->next;
    while(i++<n)
    {
        link=link->next;
    }
    temp->next=link->next;
    link->next=temp;
    printf("\n");
}
void AmendInformation(struct Student *head)
{
    int number;
    head=head->next;
    printf("Please input student's number to amend information:\n");
    scanf("%d",&number);
    while(head->number!=number)head=head->next;
    printf("Number  Name  Score\n");
    printf("%-8d%-6s%-5.2f\n",head->number,head->name,head->score);
    printf("Please input name:");
    scanf("%s",head->name);
    printf("Input score:");
    scanf("%f",&head->score);
    printf("Number  Name  Score\n");
    printf("%-8d%-6s%-5.2f\n",head->number,head->name,head->score);
    printf("\n");
}
void Array(struct Student *head)
{

    int i,j,length=CountNode(head);
    float score;
    int number;
    char name[20];
    head=head->next;
    for(i=0; i<length; i++)
    {
        for(j=i; j<length-1-i; j++)
        {
            if(head->score<head->next->score)
            {
                score=head->score;
                head->score=head->next->score;
                head->next->score=score;

                number=head->number;
                head->number=head->next->number;
                head->next->number=number;

                strcpy(name,head->name);
                strcpy(head->name,head->next->name);
                strcpy(head->next->name,name);
            }
            head=head->next;
        }
    }
}
void Display()
{
    printf("***********************************\n");
    printf("*       STUDENT DATA 2011         *\n");
    printf("***********************************\n");
    printf("*  A.Input student's information  *\n");
    printf("*  B.Output stdent information    *\n");
    printf("*  C.Rserch by input number       *\n");
    printf("*  D.Delete by input number       *\n");
    printf("*  E.Add student int the end      *\n");
    printf("*  F.Insert student               *\n");
    printf("*  G.Amend student information    *\n");
    printf("*  H.Array student information    *\n");
    printf("***********************************\n");
    printf("**          Y. Exit             ***\n");
    printf("***********************************\n");
}
void Choice()
{
    char ch;
    int n;
    struct Student *head;
    printf("Please choise function:");
    while(scanf("%c",&ch),ch!='Y'&&ch!='y')
    {
        switch(ch)
        {
        case 'A':
        case 'a':
            head=CreateLinkList();
            break;
        case 'b':
        case 'B':
            PrintScoreList(head);
            break;
        case 'c':
        case 'C':
            SearchStudent(head);
            break;
        case 'd':
        case 'D':
            DeleteStudent(head);
            break;
        case 'e':
        case 'E':
            AddStudent(head);
            break;
        case 'F':
        case 'f':
        {
            printf("please input the the position:");
            scanf("%d",&n);
            InserStudent(head,n);
        }
        break;
        case 'G':
        case 'g':
            AmendInformation(head);
            break;
        case 'H':
        case 'h':
        {
            Array(head);
            PrintScoreList(head);
        }
        break;
        }
        printf("Please choise function:");
    }
}

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2011-12-18 16:28
快速回复:我这程序为什么出错,难道文件文件函数不是这用的么?()
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