求助,写入文件的数据不匹配
设计了一个学生成绩管理系统,退出程序之前写入txt文件之后,打开文件发现里面的数值非常大,求点拨另外,求平均分该怎么写代码呢?用链表来
程序代码：*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define LEN sizeof(struct student)
#define INPUT %d %d %s %d %d %d %d %d %d %d %d %d %d
#define SCANF &pC->num,&pC->Class,pC->name,&pC->finish[0],&pC->finish[1],&pC->finish[2],&pC->finish[3],&pC->finish[4],&pC->finish[5],&pC->finish[6],&pC->finish[7],&pC->finish[8],&pC->finish[9]
#define PRINT pC->num,pC->Class,pC->name,pC->finish[0],pC->finish[1],pC->finish[2],pC->finish[3],pC->finish[4],pC->finish[5],pC->finish[6],pC->finish[7],pC->finish[8],pC->finish[9]
struct student
{
int num;
int Class;
char name[10];
int finish[10];
struct student * next;
};
struct student *insert(struct student *head,
struct student *pNode)
{
// pPrev为前驱结点位置，pNext为后继结点位置
struct student *pPrev,*pNext;
pNext = head;
if(head == NULL) { //空链表
head = pNode; //插入到第一个位置
pNode->next = NULL;
}else{ //非空链表
/*
查找插入位置。
将pNode->num与pNext->num相比较，
如果pNode->num ＞ pNext-> num ，
则待插入的结点应插在pNext所指的结点之后的某个位置，
此时将pNext后移，并使pPrev指向刚才pNext所指的结点.
*/
while((pNext != NULL) &&
(pNode->num > pNext->num)) {
pPrev = pNext;
pNext = pNext->next;
}
if (pNext == NULL) { //未找到插入位置
pPrev->next = pNode;//插入到链表最后位置
pNode->next = NULL;
}else{
if(head == pNext) //第一个位置
head = pNode;
else //其他位置
pPrev->next = pNode;
pNode->next = pNext;
}
}
return head ;
}
struct student * add_score()
{
struct student *head = NULL;
struct student *pC,*pEnd;
pC =pEnd =(struct student*) malloc(LEN);
puts("请输入学号(输入0退出):");
//scanf("INPUT",SCANF);
scanf("%d",&pC->num);printf("%d",pC->num);
if(pC->num==0)
{return head;}
else
puts("\n请输入班级(如:1):");
scanf("%d",&pC->Class);
puts("\n请输入姓名:");
scanf("%s",pC->name);
puts("\n请输入十次成绩:");
scanf("%d %d %d %d %d %d %d %d %d %d",&pC->finish[0],&pC->finish[1],&pC->finish[2],&pC->finish[3],&pC->finish[4],&pC->finish[5],&pC->finish[6],&pC->finish[7],&pC->finish[8],&pC->finish[9]);
while(pC->num>0)
{
if(head==NULL)
{
head=pC;
}
else
{
pEnd->next = pC;
}
pEnd=pC;
head = insert(head , pC);
pC=(struct student*)malloc(LEN);
puts("请输入学号(输入0退出):");
scanf("%d",&pC->num);
if(pC->num==0)
{return head;}
else
puts("\n请输入班级(如:一班):");
scanf("%d",&pC->Class);
puts("\n请输入姓名:");
scanf("%s",pC->name);
puts("\n请输入十次成绩:");
scanf("%d %d %d %d %d %d %d %d %d %d",&pC->finish[0],&pC->finish[1],&pC->finish[2],&pC->finish[3],&pC->finish[4],&pC->finish[5],&pC->finish[6],&pC->finish[7],&pC->finish[8],&pC->finish[9]);
}
pEnd->next=NULL;
return head;
}
struct student *display_one(struct student *head, int num)
{
struct student *pC = head;
if(num==0)
{return head;}
else
{
if(pC==NULL)
puts("数据不存在.");
else if(pC != NULL && num != pC->num)
{
printf("%d %d %s %d %d %d %d %d %d %d %d %d %d \n",pC->num,pC->Class,pC->name,pC->finish[0],pC->finish[1],pC->finish[2],pC->finish[3],pC->finish[4],pC->finish[5],pC->finish[6],pC->finish[7],pC->finish[8],pC->finish[9]);
}
}
return head;
}
struct student *display_class(struct student *head,int Class)
{
struct student *pC = head;
while(pC!=NULL && Class==pC->Class)
{
printf("%d %d %s %d %d %d %d %d %d %d %d %d %d\n",pC->num,pC->Class,pC->name,pC->finish[0],pC->finish[1],pC->finish[2],pC->finish[3],pC->finish[4],pC->finish[5],pC->finish[6],pC->finish[7],pC->finish[8],pC->finish[9]);
pC=pC->next;
}
return head;
}
struct student *alter(struct student *head,int num)
{
int i,score;
struct student *pC=head;
if(head==NULL)
{
printf("学号不存在.");
return NULL;
}
while(pC!=NULL && num!=pC->num)
{
pC=pC->next;
}
printf("pC == %p\n", pC);
while(i!=0)
{
printf("您想要更改第几次作业情况?(输入0退出)\n");
scanf("%d",&i);
if(i!=0)
{
printf("\n请输入分数:");
scanf("%d",&pC->finish[i-1]);
}
}
return head;
}
struct student *delete_one(struct student *head, int num)
{
struct student *pC,*pP;
pC = head;
if (pC == NULL)
{
printf("没有数据.\n");
return NULL;
}
while (pC != NULL && num != pC->num)
{
pP = pC;
pC = pC->next;
}
if(pC!=NULL)
{
printf("删除学号:%d\n", num);
if (pC == head)
{
head = pC->next;
}
else
{
pP->next = pC->next;
}
// free(pC);
}
else{
printf("学号 %d 不存在!\n",num);
}
return head;
}
//struct student *
void fileread(struct student *head)
{
FILE *fp;
struct student *pC=head;
if((fp=fopen("record.txt","r+"))==NULL)
{
printf("文件打开错误!");
}
while(pC!=NULL)
{
fscanf(fp,"%d %d %s %d %d %d %d %d %d %d %d %d %d\n",&pC->num,&pC->Class,pC->name,&pC->finish[0],&pC->finish[1],&pC->finish[2],&pC->finish[3],&pC->finish[4],&pC->finish[5],&pC->finish[6],&pC->finish[7],&pC->finish[8],&pC->finish[9]);
pC=pC->next;
}
fclose(fp);
}
void filesave(struct student *head)
{
FILE *fp;
struct student *pC=head;
if((fp=fopen("record.txt","r+"))==NULL)
{
printf("文件打开错误!");
}
while(pC!=NULL)
{
fprintf(fp,"%d %d %s %d %d %d %d %d %d %d %d %d %d\n",pC->num,pC->Class,pC->name,pC->finish[0],pC->finish[1],pC->finish[2],pC->finish[3],pC->finish[4],pC->finish[5],pC->finish[6],pC->finish[7],pC->finish[8],pC->finish[9]);
pC=pC->next;
}
fclose(fp);
}
int main()
{
struct student *mHead,*pC;
int num;
int choice,Class;
pC=mHead;
fileread(mHead);
while (choice!=7)
{
printf("\t\t\t欢迎进入学生作业完成情况管理系统\n");
printf("\t\t\t--------------------------------\n\n\n");
printf("1.录入某位学生某次作业的分数\n");
printf("2.给定学号，显示某位学生的作业完成情况\n");
printf("3.给定某个班级的班号，显示该班所有学生的作业完成情况\n");
printf("4.给定某位学生的学号，修改该学生的作业完成信息\n");
printf("5.给定某位学生的学号，删除该学生的信息\n");
printf("6.提供一些统计各类信息的功能\n");
printf("7.退出\n\n");
printf("请选择功能:");
scanf("%d",&choice);
switch (choice)
{
case 1:
add_score();break;
case 2:
printf("请输入学号:");
scanf("%d",&num);
display_one(mHead,num);break;
case 3:
printf("请输入班级:");
scanf("%d",&Class);
display_class(mHead,Class);break;
case 4:
printf("请输入学号:");
scanf("%d",&num);
alter(mHead,num);break;
case 5:
printf("请输入学号:");
scanf("%d",&num);
delete_one(mHead,num);break;
case 6:
case 7:
;}
}
filesave(mHead);
return 0;
}做
。
