//姓名，学号，英语，语文，数学三种成绩

#include

#include

#define maxnumber 30

int student_number;

int count1=0,count2=0,Operate1=3;

FILE *stream;

typedef struct stu{

 int idnumber;

 char name[20];

 double English_score;

 double chinese_score;

 double math_score;

}Student;

//按学号排序

void putout_one(Student *sp)

{

 for( int j=0;j<10;j++)

  printf("******");

 printf("\n");

 printf(" %d %s  %.1f %.1f %.1f\n",(*sp).idnumber,(*sp).name,(*sp).English_score,(*sp).chinese_score,(*sp).math_score);

 for( j=0;j<10;j++)

  printf("******");

 printf("\n");

}

void putout_lot(Student *student)

{

 for(int i=0;i<=Operate1;i++)

 {

  for(int j=0;j<10;j++)

   printf("******");

  printf("\n");

  printf(" %d %s  %.1f %.1f %.1f\n",student[i].idnumber,student[i].name,student[i].English_score,student[i].chinese_score,student[i].math_score);

 }

 for( int j=0;j<10;j++)

   printf("******");

  printf("\n");

}

void input_student(Student *S)//输入插入学生的信息

{

 //printf("请输入第%d位学生（学号，名字，语文，英语，数学）\n",i+1);

 scanf("%d",&(*S).idnumber);  

 scanf("%s",&(*S).name);

 scanf("%lf%lf%lf",&(*S).chinese_score,&(*S).English_score,&(*S).math_score);

}

void id_find_in(Student *S,Student *q)//把新的学生信息加入表单

{

 Student *p=S,*t;

 while(count1

 {

  t=p;

  p++;

  count1++;

 }

 *t=*q;

 count1=0;

 Operate1++;

}

void insert_element(Student *S)//插入学生信息

{

 printf("请输入1位学生（学号，名字，语文，英语，数学）\n");

 Student *temp=(Student *)malloc(sizeof(Student)),*q=S;

 input_student(temp);

 id_find_in(S,temp);

}

void delet_element(Student *S,int id_n)

{

 Student *p=S,*t;

 while(count1

 {

  if((*p).idnumber==id_n)

  {

   t=p;

   printf("已删除%d号学生信息\n",(*p).idnumber);

   while(count2

   {

     *(t-1)=*(++t);

     count2++;

   }

   break;

  }

  count1++;

  p++;

 }

 count1=0;

 count2=0;

 Operate1--;

}

int junge(char*a,char*b)

{

 char *p=a,*q=b;

 while(*p!='\0')

 {

  if(*p==*q)

  {

   p++;

   q++;

   continue;

  }

  else

   break;

 }

 if(*p=='\0'&&*q=='\0')

  return 1;

 else

  return 0;

}

void show_stu_element(Student*S,char*sp)//显示某人信息(功能已实现)

{

 Student *p=S;

 while(count1

 {

  if(junge((*p).name,sp))

  {

   printf("已找到此人：%s\n",(*p).name);

   putout_one(p);

   p=S;

   break;

  }

  else

  {  

   p++;

   count1++;

   continue;

  }

 }

 if(p!=S)

  printf("查无此人！\n");

 count1=0;

}

void id_sort(Student *S)

{

 Student *temp=(Student*)malloc(sizeof(Student)),*q=S,*t;

 int num=Operate1;

 while(count1

 {

  t=q+1; 

  while(count2

  {

   if( (*q).idnumber> (*t).idnumber)

   {

    *temp=*q;

    *q=*t;

    *(t)=*temp;

   // printf("%d\n",(*t).idnumber);

   }

   count2++;

   t++;

  // t=t+sizeof(Student); //这样无法实现why?

  }

  num--;

  q++;

  count2=0;

  count1++;

  //q=q+sizeof(Student);

 }

 count1=0;

 count2=0;

}

void count_passnumber(Student *S)

{

 Student *p=S;

 int e_p_number=0,m_p_number=0,c_p_number=0,num=0;

 while(num<=Operate1)

 {

  if(p->English_score>=60)

   e_p_number++;

  if(p->math_score>=60)

   m_p_number++;

  if(p->chinese_score>=60)

   c_p_number++;

  num++;

  p++;

 }

 printf("/***学生总人数=：%d\n",Operate1);

 printf("/***英语过关人数=%d 数学过关人数=%d 语文过关人数=%d\n",e_p_number,m_p_number,c_p_number);

 printf("/***英语挂科人数=%d 数学挂科人数=%d 语文挂科人数=%d\n",Operate1+1-e_p_number,Operate1+1-m_p_number,Operate1+1-c_p_number);//因为数组下标是从0开始的

}

void main()

{

 Student student[maxnumber];

 stream=freopen("in.txt","r",stdin);

 int Operate=3;int i;int id_n;

 char student_element[20];

 for(i=0;i

 {

  printf("请输入第%d位学生（学号，名字，语文，英语，数学）\n",i+1);

  scanf("%d",&student[i].idnumber);  

  scanf("%s",&student[i].name);

  scanf("%lf%lf%lf",&student[i].chinese_score,&student[i].English_score,&student[i].math_score); 

 }

 //fclose(stream);

 for( i=0;Operate!=0;i++)

 {

  printf("输入：0.退出。 1.输入学生信息 2.按姓名查找并删除学生信息 \n3.按学号排序 4.查找显示一位学生信息 \n5.显示统计记录（成员数、每科平均分） 6.输出每科及格人数和不及格人数 7(default).操作完成，等待用户输入：\n");

  scanf("%d",&Operate);

  switch(Operate)

  {

  case 1:insert_element(student); break;

  case 2: scanf("%d",&id_n);  delet_element(student,id_n); break;

  case 3:id_sort(student);break;

  case 4:scanf("%s",student_element);  show_stu_element(student,student_element);break;

  case 5:putout_lot(student);break;

  case 6:count_passnumber(student);break;

  default: printf("请输入：\n");continue;

  }

  if(Operate==0)

   break;

 }

}