#include<iostream.h>
#include<conio.h>
#include<math.h>
#include<graphics.h>
void main()
{
clrscr;
int gd=DETECT,gm;
initgraph(&gd,&gm,"c:\\tc\\bgi");
int x1,x2,y1,y2,a[3][5],j,b[3][3],c[3][5];
cout<<"enter the 1st diagnol coordinates of rectangle:\n";
cin>>x1>>y1;
cout<<"\n enter the 2nd diagnol coordinates : \n";
cin>>x2>>y2;
rectangle(x1,y1,x2,y2);
cout<<"\n the matrix for rectangle : \n";
a[1][1]=x1;
a[1][2]=x2;
a[1][3]=x2;
a[1][4]=x1;
a[2][1]=y1;
a[2][2]=y1;
a[2][3]=y2;
a[2][4]=y2;
for(int i=1;i<3;i++)
{
for(j=1;j<5;j++)
{
cout<<a[i][j]<<"\t";
}
cout<<"\n";
}
b[1][1]=2;
b[1][2]=0;
b[2][1]=0;
b[2][2]=3;
cout<<"\n the scaling matrix:\n";
for(i=1;i<3;i++)
{
for(j=1;j<3;j++)
{
cout<<b[i][j]<<"\t";
}
cout<<"\n";
}
for(i=1;i<3;i++)
{
for(j=1;j<5;j++)
{
c[i][j]=0;
for(int k=1;k<3;k++)
{
c[i][j]+=b[i][k]*a[k][j];
}
}
cout<<"\n the transformed matrix \n";
for(i=1;i<3;i++)
{
for(j=1;j<5;j++)
{
cout<<c[i][j]<<"\t";
}
cout<<"\n";
}
rectangle(c[1][1],c[2][1],c[1][3],c[2][3]);
getch();
closegraph();
}
}