geo

#include <iostream>
#include <cmath>
#include <windows.h>
using namespace std;

 struct point
{
  int x,y;
};
 struct line
{
 point A,B;
};
line AB;
point C;
bool ver();

int main()
{
    system("title GEO");
    float d;

cout<<"vector AB-coord pct A \n x=";
cin>>AB.A.x;
cout<<" y=";
cin>>AB.A.y;
cout<<"vector AB-coord pct B \n x=";
cin>>AB.B.x;
cout<<" y=";
cin>>AB.B.y;
d=sqrt(pow((AB.B.x-AB.A.x),2)+pow((AB.B.y-AB.A.y),2));
cout<<"|AB|="<<d<<endl;
cout<<"pct C \n x=";
cin>>C.x;
cout<<" y=";
cin>>C.y;
if (ver())
    cout<<"A,B,C-coliniare";
else
    cout<<"A,B,C-nu sunt coliniare";
    return 0;
}
bool ver()
{ return static_cast<bool>((C.y-AB.A.y)*(AB.B.x-AB.A.x)-(C.x-AB.B.y-AB.A.y)); }