//---------------------------------------------------------------------------
#include <cmath>
#include <iostream>
#pragma hdrstop
using namespace std;
//---------------------------------------------------------------------------
class Vect {
public: static double e;
double x, y, z;
Vect ();
Vect (double, double, double);
void Input ();
friend bool Ort (Vect&, Vect&);
};
double Vect::e;
Vect::Vect () {x=0; y=0; z=0;}
Vect::Vect (double a, double b, double c) {
a=x; b=y; c=z;
}
void Vect::Input() {
cout <<"New vector.\nx=";
cin >>x;
cout <<"y=";
cin >>y;
cout <<"z=";
cin >>z;
}
bool Ort(Vect &A, Vect &B) {
bool p;
if (fabs (A.x*B.x+A.y*B.y+A.z*B.z)<Vect::e) {
p=1; cout <<"Orthogonal."<<endl; return p;}
else {
p=0; cout <<"Not orthogonal."<<endl; return p;
}
}
#pragma argsused
int main(int argc, char *argv[])
{
system ("title Orthogonal vectors");
Vect::e=0.00000001; //Уступка.
Vect v1, v2;
v1.Input();
v2.Input();
Ort (v1, v2);
system ("pause");
return 0;
}
//---------------------------------------------------------------------------
Результат работы программы