刚开始学习c++, 例子里某个函数方法求助：GetAge()方法不返回初始化的值。
代码运行没有错误！！！
#include <iostream>
class NiaoRen{
      public:
      int GetAge();
      void SetAge(int age);
      void Meow();
      
      private:
      int itsAge;
      };
      //GetAge, public accessor function
      //return value of itsAge member
int NiaoRen::GetAge()
{
       return itsAge;
     }
     //definition of SetAge, public
     //sets itsAge memeber
void NiaoRen::SetAge(int age)
{
     itsAge = age;
     //age=30;
     }
//meow method, returns void parameters:none action.prints meow on screen
void NiaoRen::Meow()
{
      std::cout << "Meow\n";
      }
int main()
{
     NiaoRen JiangBo;
     JiangBo.SetAge(30);
     JiangBo.Meow();
     std::cout << "Jiang Bo is a Niao Ren who is:";
     std::cout << " years old.\n";
     JiangBo.Meow();
     system("pause");
     }

找到错误了