求大神帮忙！！

#include<iostream.h> class gao //构建类
{ double mo;
public: void m(double a);
double ha();
double hf();
double h();};
void gao::m(double a) //在类外定义函数
{ mo=a;}
double gao::ha()
{return mo;}
double gao::hf()
{return 1.25*mo;}
double gao::h()
{return 2.25*mo;}
class zj::gao //构建类
{ double ci; public: void z(double b);
double d();
double da();
double df(); };
void zj::z(double b) //在类外定义函数
{ci=b;}
double zj::d()
{return mo*ci;}
double zj::da()
{return mo*(ci+2);}
double zj::df()
{return mo*(ci-2.5);}
void main()
{double a,b;
cin>>a>>b;
gao m(a);
cout<<m.h()<<endl;
}