成员变量的有关问题(下面程序的异常不知道如何改）

成员变量的问题(下面程序的错误不知道怎么改）
//成员变量的问题
#include   <iostream>

using   namespace   std;

class   Year{
private:
int   y;
static   const   int   InitY   =   1970;
//pure   specifier   can   only   be   specified   for   functions

public:
Year()
{
y   =   InitY;
}
int   year()   const
{
return   y;
}
void   addYear(int   i)
{
y   =   year()   +   i;
}
};


int   main(   )
{
Year   y1;
Year*   const   py1   =   new   Year();

y1.addYear(1);
py1-> addYear(2);

cout   < <   y1.year()   < <   ", "   < <   py1-> year()   < <   endl;

return   0;
}

[解决办法]
class Year{
private:
int y;
static const int InitY;
//pure specifier can only be specified for functions

public:
Year()
{
y = InitY;
}
int year() const
{
return y;
}
void addYear(int i)
{
y = year() + i;
}
};

const int Year::InitY = 1970;