#include<iostream.h>
#include<fstream.h>
#include<stdlib.h>
#include<string.h>
#include<stdio.h>
#include<iomanip.h>
class Student
{
private:
    char name[10];
    char sex[4];
    int age;
    char number[18];
    char school[40];
    int chinese;
    int math;
    int english;
    char cho1[10];
    char cho2[10];
    int sum;
public:
    void set(char n[10],char s[4],int a,char num[18],char sh[40],int chi,int mat,int eng,char c1[10],char c2[10])
    {
      strcpy(name,n);
      strcpy(sex,s);
      age=a;
      strcpy(number,num);
      strcpy(school,sh);
      chinese=chi;
      math=mat;
      english=eng;
      strcpy(cho1,c1);
      strcpy(cho2,c2);
      sum=chinese+math+english;
    }
    void show();
    char *getname(){return name;}
    char *getsex(){return sex;}
    int getage(){return age;}
    char *getnumber(){return number;}
    char *getschool(){return school;}
    int getchinese(){return chinese;}
    int getmath(){return math;}
    int getenglish(){return english;}
    char *choose1(){return cho1;}
    char *choose2(){return cho2;}
    int getsum(){return sum;}
};
void Student::show()
{
    cout<<setiosflags(ios::left)<<setw(10)<<name<<setw(3)<<sex<<setw(3)<<age<<setw(14)<<number<<setw(18)<<school<<setw(4)<<chinese<<setw(4)<<math<<setw(4)<<english<<setw(3)<<cho1<<setw(3)<<cho2<<setw(3)<<sum<<endl;
}
struct node
{
    Student student;
    node *next;
};
int count=0;
node  *OpenFile()
{
    fstream infile("data.txt",ios::in|ios::nocreate);
    if(!infile)
    {
        cout<<"can not open file\n";
        exit(0);
    }
    node *p1,*p2,*head=0;
    char n[20];char s[4];int a;char num[20];char sh[40];int chi;int mat;int eng;char c1[10];char c2[10];
    
    while(infile>>n)
    {         
        infile>>s>>a>>num>>sh>>chi>>mat>>eng>>c1>>c2;
        p1=new node;
        Student stu;
        stu.set(n,s,a,num,sh,chi,mat,eng,c1,c2);
        p1->student=stu;
        if(head==0) {
            head=p1;p2=p1;}
        else {p2->next=p1;p2=p1;count++;}
    }
    p2->next=0;
    infile.close();
    return head;
}
void Show(node *head)
{
    node *p=head;
    while(p)
    {
        p->student.show();
        p=p->next;
    }
}
node *sort(node *head)
{
    node *p;Student stu;
    for(int i=0;i<count;i++)
    {
        p=head;
        for(int j=0;j<count-i;j++)
        {
            if(p->student.getsum()<=p->next->student.getsum())
            {
                stu=p->student;p->student=p->next->student;p->next->student=stu;
            }
            p=p->next;
        }
    }
    return head;
}

void tongji(node *head)
{
    ofstream outfile("分数段统计.txt",ios::out);
    if(!outfile)
    {
        cout<<"不能打开文件\n";
        exit(0);
    }
    node *p=head;
     for(int m=head->student.getsum();m>=5;m=m-5)
    {
        int a=0;
          while((m-5)<p->student.getsum()&&p->next!=NULL)
          {
              if((m-5)<p->student.getsum()&&p->student.getsum()<=m)
               {a++;}
               p=p->next;
          }
        cout<<"("<<m-5<<","<<m<<"]"<<' '<<a<<endl;
    }
}
void main()
{
    node *head=0,*head1=0;
    head=OpenFile();
    head=sort(head);
    cout<<"总分排名:\n";
    Show(head);
    tongji(head);
}
数据格式  崔绢   女 18 083201251253 泰安中学 134 142 134 A+ A
          陈雪   女 17 083210253205 南通一中 142 128 124 A A+
          卞磊   男 18 083205325142 南京一中 138 142 125 B B+
          陈小冬 男 18 083256254523 南京外国语学校 125 134 105 A A
          朱留军 男 18 083215235214 江阴中学 124 105 132 A B+
          姜小昆 男 17 083201532541 安口中学 112 123 102 A B+
          冯坤   女 18 083201523211 姜堰中学 109 132 120 A B
分数段人数统计时会少一个数据 如有6个数据 但分数段人数统计时只有5人（但总分排序人数没少 是正确的）