程序代码：

#include <iostream>
using namespace std;
class student
{
public:
    student(int n,string nam,float s):num(n),name(nam),score(s){}
private:
    int a[5];
    char num;
    string name;
  float score;
  void set()
  {student  a[5];
    int i,j=0,k=0;
    cout<<"请输入学生1的学号:";
    cin>>a[0].num;
    cout<<"请输入学生1的姓名:";
    cin>>a[0].name;
    cout<<"请输入学生1的成绩:";
    cin>>a[0].score;}

 int main()
{ double sun=a[0].score,max=a[0].score,min=a[0].score;
    for(i=1;i<N;i++)
    {  cout<<"请输入学生"<<i+1<<"的学号:";
       cin>>a[i].num;
       cout<<"请输入学生"<<i+1<<"的姓名:";
       cin>>a[i].name;
       cout<<"请输入学生"<<i+1<<"的成绩:";
       cin>>a[i].score;
       sum+=a[i].score;
       if(a[i].score>max)
       {
           max=a[i].score;
           j=i;
       }
       if(a[i].score<min)
       {
           min=a[i].score;
           k=i;
       }
    }
    cout<<"平均分:"<<"ave="<<sum/3<<endl;
    cout<<"最高分学号:"<<a[j].num<<"最高分姓名:"<<a[j].name<<"最高分分数:"<<a[j].score<<endl;
    cout<<"最高分学号:"<<a[k].num<<"最低分姓名:"<<a[k].name<<"最低分分数:"<<a[k].score<<endl;
    return 0;
}

程序代码：

#include <iostream>
using namespace std;
class Student
{public:
Student(int n,int a,float s):num(n),name(a),score(s){}
void total();
static float average();
private:
    int num;
    int name;
    float score;
    static float sum;
    static int count;
};
void Student::total()
{sum+=score;
count++;
}
float Student::average()
{return(sum/count);
}
float Student::sum=0;
int Student::count=0;
int main()
{Student stud[3]={
Student(0063,01,59),
Student(0064,02,99),
Student(0065,03,60)
};
int n;
cout<<"please input the number of students:";
cin>>n;
for(int i=0;i<n;i++)
stud[i].total();
cout<<"the average score of"<<n<<"students is"<<Student::average()<<endl;

int main()
{
    int i,max;
    int j[3]={59,99,60};
    max=j[0];
    for(i=0;i<=3;i++)
    if(j[i]>max)
    {max=j[i];
    }
cout<<"max="<<max<<endl;
return 0;
}

int main()
{
    int i,min;
    int j[3]={59,99,60};
    min=j[0];
    for(i=0;i<=3;i++)
    if(j[i]<min)
    {min=j[i];
    }
cout<<"min="<<min<<endl;
return 0;
}

程序代码：

#include <iostream>
using namespace std;
class Student
{public:
Student(int n,int a,float s):num(n),name(a),score(s){}
void total();
static float average();
private:
    int num;
    int name;
    float score;
    static float sum;
    static int count;
};
void Student::total()
{sum+=score;
count++;
}
float Student::average()
{return(sum/count);
}
float Student::sum=0;
int Student::count=0;
int main()
{Student stud[3]={
Student(0063,01,59),
Student(0064,02,99),
Student(0065,03,60)
};
int n;
for(int i=0;i<n;i++)
stud[i].total();
cout<<"the average score of"<<n<<"students is"<<Student::average()<<endl;
{    int i,max=0,min=0;
    int j[3]={59,99,60};
    max=j[0];
    for(i=0;i<=3;i++)
    if(j[i]>max)
    {max=j[i];
}cout<<"max="<<max<<endl;

 min=j[0];
    for(i=0;i<=3;i++)
    if(j[i]<min)
    {min=j[i];
}cout<<"min="<<min<<endl;
}
return 0;
}