IO: 作业：Day1

思维导图

main.c

#include"student.h"
int main(int argc, const char *argv[])
{
   stuPtr h=creat();
   int n=0;

   add_node(h);
   add_node(h);
   add_node(h);

   show(h);

   save(h,"student.txt");

   stuPtr ptr=creat();

   load(ptr,"student.txt",n);

   stuPtr ptr1=creat();

   change(ptr1,"student.txt",n);

   return 0;
}

student.c

#include"student.h"

stuPtr creat()
{
   stuPtr h=(stuPtr)malloc(sizeof(stu));
   if(NULL==h)
   {
       printf("创建失败\n");
       return NULL;
   }
   h->len=0;
   h->next=NULL;
   return h;
}

stuPtr creatNode()
{
   stuPtr newnode=(stuPtr)malloc(sizeof(stu));
   if(NULL==newnode)
   {
       printf("节点申请失败\n");
       return NULL;
   }
   newnode->next=NULL;

   printf("姓名：");
   fscanf(stdin,"%s",newnode->Data.name);
   printf("数学：");
   fscanf(stdin,"%d",&newnode->Data.math);
   printf("语文：");
   fscanf(stdin,"%d",&newnode->Data.chinese);
   printf("英语：");
   fscanf(stdin,"%d",&newnode->Data.english);
   printf("物理：");
   fscanf(stdin,"%d",&newnode->Data.physical);
   printf("化学：");
   fscanf(stdin,"%d",&newnode->Data.chemical);
   printf("生物：");
   fscanf(stdin,"%d",&newnode->Data.biological);
}
int empt(stuPtr h)
{
   if(NULL==h)
   {
       printf("判空失败\n");
       return -1;
   }
   return h->next==NULL;
}

int add_node(stuPtr h)
{
   if(NULL==h)
   {
       printf("添加数据失败\n");
       return -1;
   }
   stuPtr newnode=creatNode();

   stuPtr temp=h;
   while(temp->next!=NULL)
   {
       temp=temp->next;
   }
   temp->next=newnode;

   h->len++;
   return 1;
}

void show(stuPtr h)
{
   if(NULL==h)
   {
       printf("遍历失败\n");
       return;
   }
   stuPtr p=h->next;
   for(int i=0;i<h->len;i++)
   {
       fprintf(stdout,"%s %d %d %d %d %d %d\n",p->Data.name,p->Data.math,p->Data.chinese,p->Data.english,p->Data.physical,p->Data.chemical,p->Data.biological);
       p=p->next;
   }
   return;
}

void save(stuPtr h,const char* filename)
{
   FILE* p=fopen(filename,"w");
   stuPtr p1=h->next;
   for(int i=0;i<h->len;i++)
   {
       fprintf(p,"%s %d %d %d %d %d %d\n",p1->Data.name,p1->Data.math,p1->Data.chinese,p1->Data.english,p1->Data.physical,p1->Data.chemical,p1->Data.biological);
       p1=p1->next;
   }
   fclose(p);
}
void load(stuPtr ptr,const char* filename,int n)
{
   if(NULL==ptr)
   {
       printf("失败\n");
       return;
   }
   FILE* p=fopen(filename,"r");
   for(int i=0;i<n;i++)
   {
       stuPtr p1=creat();
       fscanf(p,"%s %d %d %d %d %d %d\n",p1->Data.name,&p1->Data.math,&p1->Data.chinese,&p1->Data.english,&p1->Data.physical,&p1->Data.chemical,&p1->Data.biological);
       stuPtr p2=ptr;
       while(p2->next!=ptr)
       {
           p2=p2->next;
       }
       p2->next=p1;
       p1->next=ptr;
       ptr->len++;

   }
   return;
}

void change(stuPtr h,const char* filename,int n)
{
   load(h,filename,n);
   stuPtr p1=h->next;
   for(int i=0;i<n;i++)
   {
       printf("请输入修改后%s的数学成绩",p1->Data.name);
       scanf("%d",&p1->Data.math);
       p1=p1->next;
   }
   save(h,filename);
}

student.h

#ifndef __STUDENT__
#define __STUDENT__
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
typedef struct
{
   char name[20];
int math;
int chinese;
int english;
int physical;
int chemical;
int biological;
}data,*dataPtr;

typedef struct student
{
   union
   {
       data Data;
       int len;
   };
   struct student *next;
}stu,*stuPtr;

stuPtr creat();
stuPtr creatNode();

int empt(stuPtr h);
int add(stuPtr h);
int add_node(stuPtr h);
void show(stuPtr h);
void save(stuPtr h,const char* filename);
void load(stuPtr h,const char* filename,int n);
void change(stuPtr h,const char* filename,int n);
#endif