You should submit five files for this assignment prog1 mainc

You should submit five files for this assignment: prog1 main.cpp: Source file containing your main function Point h: Header file containing definition of Point structure and prototypes of relevant functions. Point cpp: Source file containing definitions of Point functions. Polygon h: Header file containing definition of Polygon structure and prototypes of relevant functions. Polygon.cpp: Source file containing definitions of Polygon functions

Solution

#include <iostream.h>

#include <graphics.h>

#include <conio.h>

#include <math.h>

void show_screen( );

void Polygon(const int,const int []);

void Line(const int,const int,const int,const int);

int main( )

{

int driver=VGA;

int mode=VGAHI;

int n=0;

do

{

show_screen( );

gotoxy(12,13);

cout<<\"Enter the number of points : \";

cin>>n;

int *coordinates=new int[(n*2)];

for(int count=0;count<n;count++)>

{

gotoxy(8,18);

cout<<\"Coordinates of Point-\"<<(count+1)<<\" (x\"<<(count+1)<<\",y\"<<(count+1)<<\") :\";

gotoxy(12,21);

cout<<\"Enter the value of x\"<<(count+1)<<\" = \";

cin>>coordinates[(count*2)];

gotoxy(12,22);

cout<<\"Enter the value of y\"<<(count+1)<<\" = \";

cin>>coordinates[((count*2)+1)];

gotoxy(8,18);

cout<<\" \";

gotoxy(12,21);

cout<<\" \";

gotoxy(12,22);

cout<<\" \";

}

initgraph(&driver,&mode,\"c:\\\\tc\\\\Bgi\");

setcolor(15);

Polygon(n,coordinates);

delete coordinates;

setcolor(15);

outtextxy(110,460,\"Press <enter> to continue or any other key to exit.\");

int key=int(getch( ));

if(key!=13)

break;

}

while(1);

return 0;

}

void Polygon(const int n,const int coordinates[])

{

if(n>=2)

{

Line(coordinates[0],coordinates[1],

coordinates[2],coordinates[3]);

for(int count=1;count<(n-1);count++)

Line(coordinates[(count*2)],coordinates[((count*2)+1)],

coordinates[((count+1)*2)],

coordinates[(((count+1)*2)+1)]);

}

}

void Line(const int x_1,const int y_1,const int x_2,const int y_2)

{

int color=getcolor( );

int x1=x_1;

int y1=y_1;

int x2=x_2;

int y2=y_2;

if(x_1>x_2)

{

x1=x_2;

y1=y_2;

x2=x_1;

y2=y_1;

}

int dx=abs(x2-x1);

int dy=abs(y2-y1);

int inc_dec=((y2>=y1)?1:-1);

if(dx>dy)

{

int two_dy=(2*dy);

int two_dy_dx=(2*(dy-dx));

int p=((2*dy)-dx);

int x=x1;

int y=y1;

putpixel(x,y,color);

while(x<x2)>

{

x++;

if(p<0)

p+=two_dy;

else

{

y+=inc_dec;

p+=two_dy_dx;

}

putpixel(x,y,color);

}

}

else

{

int two_dx=(2*dx);

int two_dx_dy=(2*(dx-dy));

int p=((2*dx)-dy);

int x=x1;

int y=y1;

putpixel(x,y,color);

while(y!=y2)

{

y+=inc_dec;

if(p<0)

p+=two_dx;

else

{

x++;

p+=two_dx_dy;

}

putpixel(x,y,color);

}

}

}

void show_screen( )

{

restorecrtmode( );

textmode(C4350);

textbackground(1);

cprintf(\" Polygon \");

textbackground(8);

gotoxy(1,2);

}