How To Draw Graphics In C

Home » C solved programs

C graphics program to draw a line.

In this code snippet/program/example we will learn how to draw a line using programming using line() function of graphics.h header file?

In this example we will draw two horizontal lines using line() function of graphics.h.

line() in c programming:

line() is a library function of graphics.c in c programming language which is used to draw a line from two coordinates.

For example if you want to draw a line from point(x1,y1) to point(x2,y2) you have to use line() function like line(x1,y1,x2,y2);

Syntax (Declaration of line() function in C)

line(int x1,int y1, int x2,int y2);

C Code Snippet - Graphics program to Draw a line using line() and lineto()

Let's consider the following 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          ;          }

Output

Reference: http://www.programmingsimplified.com/c/graphics.h/line

Draw a line from current point to point(x,y) using lineto() function

lineto() is a library function of graphics.h and it can be used to draw a line from current point to specified point.

For example, if you want to draw a line from current point to point(x,y), you have to use lineto() function like lineto(x,y)

Syntax (Declaration of line() function in C)

lineto(int x, int y);

In this program we will draw a line from current point to point (100,200).

          /*Draw a line from current point to                    point(x,y) using lineto() function*/          #          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          lineto(          100          ,          200          )          ;          //will dra a line to point(100,200)          getch(          )          ;          closegraph(          )          ;          return          0          ;          }