scaling program

//// scaling program////

#include<stdio.h>

#include<conio.h>

#include<stdlib.h>

#include<graphics.h>

void matrixmulti(int translate[3][3],int vertex[3][5],int result[3][5]);

void main()

{

            int gd=DETECT,gm,errorcode;

            initgraph(&gd,&gm,"\\tc\\bgi");

            errorcode=graphresult();

            if(errorcode!=grOk)

            {

                        printf("Graphics ERROR!: %s",grapherrormsg(errorcode));

                        printf("\nPress any Key .......");

                        getch();

                        exit(1);

            }

            setbkcolor(2);

            int vertex[3][5]={{100,100,200,200,100},

            {100,200,200,100,100},

            {1,1,1,1,1}};

            for(int i=0;i<4;i++)

            {

                        setcolor(BLUE);

                        line(vertex[0][i],vertex[1][i],vertex[0][i+1],vertex[1][i+1]);

            }

            printf("SCALE X=");

            int sx,sy;

            scanf("%d",&sx);

            printf("SCALE Y:=");

            scanf("%d",&sy);

            int translate[3][3]={{2,0,0},{0,1,0},{0,0,1}};

            translate[0][0]=sx;

            translate[1][1]=sy;

            printf("Press any key for the translated line.....\n");

            getch();

            int result[3][5];

            matrixmulti(translate,vertex,result);

            for(i=0;i<4;i++)

            {

                        setcolor(YELLOW);

                        line(result[0][i],result[1][i],result[0][i+1],result[1][i+1]);

            }

            getch();

            closegraph();

}

void matrixmulti(int translate[3][3],int vertex[3][5],int result[3][5])

{

            for(int i=0;i<=3;i++)

            {

                        for(int j=0;j<=5;j++)

                        {

                                    result[i][j]=0;

                                    for(int k=0;k<=3;k++)

                                                result[i][j]+=translate[i][k]*vertex[k][j];

                        }

            }

}