多重继承

 #include"iostream.h"
class Base1
{
protected:
 int iVar1;
public:
 void show_1()
 {
  cout<<iVar1<<endl;
 }
};
class Base2
{
protected:
 int iVar2;
public:
 void show_2()
 {
  cout<<iVar2<<endl;
 }
};
class Derived:public Base1,public Base2
{
public:
 void set(int ix,int iy)
 {
  iVar1=ix;
  iVar2=iy;
 }
};
void main()
{
 Derived dVar;
 dVar.set(19,30);
 dVar.show_1();
 dVar.show_2();
}