lab - moroz / oopLab1 / oopLab1

#include<stdio.h>
#include<math.h>
#include<stdlib.h>
#include<conio.h>

class Rectangle{
	int x[4],y[4];
public:
	void Input();
	void ProvKoor();
	void ProvNaPram();
	void VichParam();
};
void Rectangle::Input()
{
	for (int(i)=0;i<4;i++)
	{
		printf("Vvedite koordinaty x%d %d-oy tochki:",(i+1),(i+1));
		scanf("%d",&x[i]);
		printf("Vvedite koordinaty y%d %d-oy tochki:",(i+1),(i+1));
		scanf("%d",&y[i]);
	}
}
void Rectangle::ProvKoor()
{
	for (int(i)=0;i<3;i++)
	{
		if (((x[i]<0) || (x[i]>20)) || ((y[i]<0) || (y[i]>20))) printf("Vi vveli nepravelnie koordinati!");
	} 
}
void Rectangle::ProvNaPram()
{
	double d1,d2;
	d1=sqrt(double((x[2]-x[0])*(x[2]-x[0])+(y[2]-y[0])*(y[2]-y[0])));
	d2=sqrt(double((x[3]-x[1])*(x[3]-x[1])+(y[3]-y[1])*(y[3]-y[1])));
	if (d1==d2) printf("Vi vveli koordinati pramougolnika!");
	else printf("Eto ne pramougolnik!!!");
}
void Rectangle::VichParam()
{
	double length,width,perimetr,area;
	length=sqrt(double((x[1]-x[0])*(x[1]-x[0])+(y[1]-y[0])*(y[1]-y[0])));
	width=sqrt(double((x[2]-x[1])*(x[2]-x[1])+(y[2]-y[1])*(y[2]-y[1])));
	perimetr=2*(length+width);
	area=length*width;
	printf("\nDlina=%f\nShirina=%f\nPerimetr=%f\nPloshad=%f\n",length,width,perimetr,area); 
	scanf("%d",&x[1]);
}

int main()
{
	Rectangle pram;
	pram.Input();
	pram.ProvKoor();
	pram.ProvNaPram();
	pram.VichParam();
	getchar();
}