类与对象\常成员

void print();
void print()const;
//正确的重载函数

#include<iostream>
using namespace std;

class Croster
{
private:
  string name;
  int Math;
  static const double Score;
  double GPA;
public:
  Croster(string na = "undef", int m = 0, int s = 3);
  double GetGPA();
  void Display()const;
};

//常数据成员的初始化只能在构造函数的初始化列表中进行
Croster::Croster(string na, int m, int s)//:Score(s)
{
  name = na;
  Math = m;
}

double Croster::GetGPA()
{
  GPA = Math / 100.0 * Score;
  return GPA;
}

void Croster::Display() const
{
  cout << name << " get " << Math << endl;
  cout << "Your GPA is>>>" << GPA << endl;
}
//在类外初始化
const double Croster::Score = 3.0;
int main()
{
  Croster stu_a("Steve", 95);
  stu_a.GetGPA();
  stu_a.Display();

  return 0;
}