A Triangle is made up of three vertices or points in which three line segments are joined together.

Here is the snippet.

Program for Translation of a Triangle in C

Program:

/* translation */
#include<conio.h>
#include<graphics.h>
#include<stdio.h>
void main()
{
int gd=DETECT,gm;
int x,y,x1,y1,x2,y2,tx,ty;
clrscr();
initgraph(&gd,&gm,"C:\\TURBOC3\\BGI");
printf("\n Please enter first coordinate of the triangle= ");
scanf("%d %d", &x,&y);
printf("\n Enter second coordinate of the trinagle = ");
scanf("%d %d",&x1,&y1);
printf("\n Enter third coordinate of the triangle = ");
scanf("%d %d",&x2,&y2);
printf("\n\t\t********** TRIANGLE before & after translation ***********");
line(x,y,x1,y1);
line(x1,y1,x2,y2);
line(x2,y2,x,y);
printf("\n Now enter the translation vector = ");
scanf("%d %d",&tx,&ty);

setcolor(RED);
line(x+tx,y+ty,x1+tx,y1+ty);
line(x1+tx,y1+ty,x2+tx,y2+ty);
line(x2+tx,y2+ty,x+tx,y+ty);
getch();
closegraph();
}

Output:

Must Read: What is 2D Translation?

Program to show the translation of a line

Program:

#include<conio.h>
#include<graphics.h>
#include<stdio.h>
void main()
{
int gd=DETECT,gm;
// declaring two array
// Translation vector already initialized
int l[2][2],v[2]={10,15},i=0,j;
clrscr();
initgraph(&gd,&gm,"C:\\TURBOC3\\BGI");
printf("Enter the initial and final coordinates of a line ");

// Getting input from user, having 2D array where 1st row represents initial point
// And Second row represents final coordinate
while(i<2)
{
printf("x%d and y%d = ",i,i);
j=0;
scanf("%d",&l[i][j]);
scanf("%d",&l[i][j+1]);
i++;
}
// Line before translation
line(l[0][0],l[0][1],l[1][0],l[1][1]);
setcolor(BLUE);
// Line after translation
line(l[0][0]+v[0],l[0][1]+v[1],l[1][0]+v[0],l[1][1]+v[1]); // Adding Translation vector in it to change the position
getch();
closegraph();
}

Output:

Related post with Example:

2D Translation: Positioning of an Object

C Program to show a kite is flying

Program:

#include<stdio.h>
#include<conio.h>
#include<graphics.h>
#include<stdlib.h>
void main()
{
int gm,gd=DETECT;
int i= 0,j=0,rnd_x=0,rnd_y,stop_me=0;
initgraph(&gd,&gm,"C:\\TURBOC3\\BGI");
srand(time());
while(stop_me<=1000)
{

if(i>=180 &&j>=100 ) // controlling kite, so that it wouldn't disappear from screen
{
rnd_x=rand()%4 -3;
rnd_y=rand()%5 -4;
}
else{
rnd_x=rand()%3;
rnd_y=rand()%3;
}
line(200+i,200-j,250+i,250-j);
line(200+i,200-j,150+i,250-j);
line(150+i,250-j,200+i,350-j);
line(200+i,350-j,250+i,250-j);
line(200+i,200-j,200+i,350-j);
arc(200+i,275-j,25,155,50);
line(0,500,200+i,225-j);
i=i+rnd_x;
j=j+rnd_y;
stop_me=5+stop_me;
delay(100);
clearviewport(); // clearing image which would make illusion of flying kite

}
getch();
closegraph();

}

Output: