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line() Function in C Programming Language
line() Function in C
line() is a library function of graphics.c in c programming language which is used to draw a line from two coordinates. line() function is used to draw a line from a point(x1,y1) to point(x2,y2) i.e. (x1,y1) and (x2,y2) are end points of the line.
Syntax for line() Function in C
#include <graphics.h>
void line(int x1, int y1, int x2, int y2);
x1
X coordinate of first point
y1
Y coordinate of first point.
x2
X coordinate of second point.
y2
Y coordinate of second point.
This is a predefined function named line which is used to draw a line on the output screen. It takes 4 arguments, first two parameters represent an initial point and the last two arguments are for the final points of the line.
/* draw a line from a point(x1,y1) to point(x2,y2) by line() function example */
/*C graphics program to draw a line.*/
#include <graphics.h>
#include <conio.h>
main()
{
int gd = DETECT, gm;
//init graphics
initgraph(&gd, &gm, "C:/TURBOC3/BGI");
/*
if you are using turboc2 use below line to init graphics:
initgraph(&gd, &gm, "C:/TC/BGI");
*/
//draw a line
/*
line() function description
parameter left to right
x1: 100
y1: 100
x2: 200
y2: 100
*/
line(100,100,200,100); //will draw a horizontal line
line(10,10,200,10); //will draw another horizonatl line
getch();
closegraph();
return 0;
}
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