chuvi.cpp

examples C,c++ codes programs

#include<iostream.h>
#include<conio.h>
class hcn
{
double a,b;
public :
void ganhcn(double at, double bt);
double dientich();
double chuvi();
};
void hcn::ganhcn(double at, double bt)
{
a=at;
b=bt;
}
double hcn::dientich()
{
return a*b;
}
double hcn::chuvi()
{
return (a+b)*2;
}

class hv : public hcn
{
public :
void ganhv(double at);
};
void hv::ganhv(double at)
{
ganhcn(at,at);
}
void main()
{
hcn c;
hv v;
double a, b;
cout<<"\n nhap chieu dai hinh chu nhat  a = "; cin>>a;
cout<<"\n nhap chieu rong hinh chu nhat b = "; cin>>b;
c.ganhcn(a,b);
cout<<"\n nhap do dai canh hinh vuong   c = "; cin>>a;
v.ganhv(a);
cout<<"\n chu vi hinh chu nhat la c = "<<c.chuvi();
cout<<"\n chu vi hinh vuong la    c = "<<v.chuvi();
cout<<"\n dien ticn hinh vuong la s = "<<v.dientich();
getch();
}