Translation

#include<stdio.h>
#include<conio.h>
#include<graphics.h>
int i,x,y,tx,ty,sx,sy,angle=10,xmax,ymax,xmid,ymid,op=1;
float p1[10]={50,50,100,50,100,100,50,100,50,50};
float b[3][3]={1,0,0,0,1,0,0,0,1};
int c[1][1];
float a[1][1];

void trans(){
    printf("\nEnter x translation: ");
    scanf("%d",&tx);
    printf("\nEnter y translation: ");
    scanf("%d",&ty);
    b[0][0]=1;b[0][1]=0;b[0][2]=0;b[1][0]=0;
    b[1][1]=1;b[1][2]=0;b[2][0]=tx;b[2][1]=ty;b[2][2]=1;
}
void main(){
    int gd=DETECT,gm;
    clrscr();
    initgraph(&gd, &gm, "C:\\tc\\bgi");
    trans();
    xmax=getmaxx();
    ymax=getmaxy();
    xmid=xmax/2;
    ymid=ymax/2;
    setcolor(1);
    line(xmid,0,xmid,ymax);
    line(0,ymid,xmax,ymid);
    setcolor(4);
    for(i=0;i<8;i=i+2)
    line(p1[i]+xmid,ymid-p1[i+1],xmid+p1[i+2],ymid-p1[i+3]);
    for(i=0;i<9;i=i+2){
        a[0][0]=p1[i];a[0][1]=p1[i+1];
        c[0][0]=a[0][0]*b[0][0]+a[0][1]*b[1][0]+b[2][0];
        c[0][1]=a[0][0]*b[0][1]+a[0][1]*b[1][1]+b[2][1];
        p1[i]=c[0][0];
        p1[i+1]=c[0][1];
    }
    setcolor(15);
    for(i=0;i<8;i=i+2)
    line(p1[i]+xmid,ymid-p1[i+1],xmid+p1[i+2],ymid-p1[i+3]);
    getch();
}