Logo 
Search:

C++ Programming Articles

Submit Article
Home » Articles » C++ Programming » Computer GraphicsRSS Feeds

Program to draw a Triangle

Posted By: Easy Tutor     Category: C++ Programming     Views: 39450

Write a program to draw a Triangle.

Code for Program to draw a Triangle in C++ Programming

 # include <iostream.h>
 # include <graphics.h>
 # include    <conio.h>
 # include     <math.h>

 void show_screen( );

 void Triangle(constint,constint,constint,constint,constint,constint);

 void Line(constint,constint,constint,constint);


 int main( )
    {
       int driver=VGA;
       int mode=VGAHI;

       int x_1=0;
       int y_1=0;

       int x_2=0;
       int y_2=0;

       int x_3=0;
       int y_3=0;

       do
      {
         show_screen( );

         gotoxy(8,10);
         cout<<"Coordinates of Point-I (x1,y1) :";

         gotoxy(8,11);
         cout<<"ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ";

         gotoxy(12,13);
         cout<<"Enter the value of x1 = ";
         cin>>x_1;

         gotoxy(12,14);
         cout<<"Enter the value of y1 = ";
         cin>>y_1;

         gotoxy(8,18);
         cout<<"Coordinates of Point-II (x2,y2) :";

         gotoxy(8,19);
         cout<<"ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ";

         gotoxy(12,21);
         cout<<"Enter the value of x2 = ";
         cin>>x_2;

         gotoxy(12,22);
         cout<<"Enter the value of y2 = ";
         cin>>y_2;

         gotoxy(8,26);
         cout<<"Coordinates of Point-III (x3,y3) :";

         gotoxy(8,27);
         cout<<"ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ";

         gotoxy(12,29);
         cout<<"Enter the value of x3 = ";
         cin>>x_3;

         gotoxy(12,30);
         cout<<"Enter the value of y3 = ";
         cin>>y_3;

         initgraph(&driver,&mode,"..\\Bgi");

         setcolor(15);
           Triangle(x_1,y_1,x_2,y_2,x_3,y_3);

         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;
    }


 /*************************************************************************///----------------------------  Triangle( )  ----------------------------///*************************************************************************/void Triangle(constint x_1,constint y_1,constint x_2,constint y_2,
                        constint x_3,constint y_3)
    {
       Line(x_1,y_1,x_2,y_2);
       Line(x_2,y_2,x_3,y_3);
       Line(x_3,y_3,x_1,y_1);
    }

 /*************************************************************************///-------------------------------  Line( )  -----------------------------///*************************************************************************/void Line(constint x_1,constint y_1,constint x_2,constint 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);
        }
      }
    }

 /*************************************************************************///--------------------------  show_screen( )  ---------------------------///*************************************************************************/void show_screen( )
    {
       restorecrtmode( );
       textmode(C4350);

       cprintf("\n********************************************************************************");
       cprintf("*********************************-            -*********************************");
       cprintf("*--------------------------------- ");

       textbackground(1);
       cprintf(" Triangle ");
       textbackground(8);

       cprintf(" ---------------------------------*");
       cprintf("*********************************-            -*********************************");
       cprintf("*-****************************************************************************-*");

       for(int count=0;count<42;count++)
      cprintf("*-*                                                                          *-*");

       gotoxy(1,46);
       cprintf("*-****************************************************************************-*");
       cprintf("*------------------------------------------------------------------------------*");
       cprintf("********************************************************************************");

       gotoxy(1,2);
    }
  
Share: 


Didn't find what you were looking for? Find more on Program to draw a Triangle Or get search suggestion and latest updates.

Easy Tutor
Easy Tutor author of Program to draw a Triangle is from United States. Easy Tutor says

Hello Friends,

I am Free Lance Tutor, who helped student in completing their homework.

I have 4 Years of hands on experience on helping student in completing their homework. I also guide them in doing their final year projects.

I have share many programs on this website for everyone to use freely, if you need further assistance, than please contact me on easytutor.2ya [at the rate] gmail [dot] com

I have special discount scheme for providing tutor services. I am providing tutor service to students from various contries, currently most of my students are from United States, India, Australia, Pakistan, Germany, UK and Canada.

I am also here to expand my technical network to receive more opportunity in my career, make friends to help them in resolving their technical problem, learn and share my knowledge, If you like to be my friend, Please send me friend request.

Thanks,
Happy Programming :)

 
View All Articles

 
Please enter your Comment

  • Comment should be atleast 30 Characters.
  • Please put code inside [Code] your code [/Code].

 
Idris Saheed from United States Comment on: Mar 11
pls sir i will be very grateful if i can get C++ compiler working with window 8, 64bit. while wiating for your response at soon you get this message, i say thanks to you .

Menakan Arulanantham from United States Comment on: May 16
how to run this program? can i run in quincy?

Stump Enum from New Zealand Comment on: Apr 11
excuse me, i know these files are all old but, i am learning c++ for fun, i'm interested in the graphics now too, but apparently <graphics.h> is not usable in windows. im using that free MS Visual C++ 2008 Express.
i guess my question is, is there an alternative to <graphics.h> ?

if not..is c++ outdated?

View All Comments