萌新求助大佬，怎么做到图一效果，我目前只做出了图二效果。。。

如题向大佬们求助，想好好学c++，以后可能就是靠它吃饭了吧

把总成绩，最高，最低定义为静态数据成员

是不是要代码

#include<string>
#include"iostream"
using namespace std;
class Student
{
public:
Student(int nu, string na, float ma);
~Student();
void Output();
float Get_mark();
private:
int number;
string name;
float mark;
};
static int _iStudentNumber = 0;
Student::Student(int nu, string na, float ma)
{
number = nu;
name = na;
mark = ma;
_iStudentNumber++;
}
Student::~Student()
{
cout << "destruct..." << endl;
_iStudentNumber--;
}
void Student::Output()
{
cout << "学号" << "：" << number << " 姓名" << "：" << name << " 成绩" << "：" << mark << endl;
}
float Student::Get_mark()
{
return mark;
}
int main()
{
Student S[] = { { 1001, "张三", 97.5 },{ 1002, "李四", 83.0 },{ 1003, "王五", 93.0 },{ 1004, "郭六", 62.5 },{ 1005, "任七", 77.0 } };
float avg = 0;
float sum = 0;
float highmark = S[0].Get_mark();
float lowmark = S[0].Get_mark();
for (int i = 0; i < _iStudentNumber; i++)
{
sum += S[i].Get_mark();
}
avg = sum / _iStudentNumber;
for (int i = 1; i < _iStudentNumber; i++)
{
if (highmark < S[i].Get_mark())
{
highmark = S[i].Get_mark();
}
if (lowmark > S[i].Get_mark())
{
lowmark = S[i].Get_mark();
}
}
S[0].Output();
S[1].Output();
S[2].Output();
S[3].Output();
S[4].Output();
cout << "学生总数：" << _iStudentNumber<<" ";
cout << "总成绩：" << sum << endl;
cout << "平均成绩：" << avg << " ";
cout << "最高成绩：" << highmark << " ";
cout << "最低成绩：" << lowmark << endl ;
system("pause");
return 0;
}