A tutorial on graphics.h - How to use graphics.h

The graphics.h file is used in C language to get basic graphics working in C. 

Position Tracking

The positioning is done from the top left corner as shown in the image below,

Including graphics library

#include<stdio.h> #include<graphics.h> void main() { }

Loading The Graphics Driver

#include<stdio.h> #include<conio.h> #include<graphics.h> void main() { int gdriver=DETECT,gmode; initgraph(&gdriver,&gmode," "); }

References Of Common Functions

Cleardevice()
Clears screen

gotoxy()
Moves the cursor to a specific location on screen

putpixel()
Puts a small pixel(a very small dot) at the location mentioned in the function.

outtextxy()
Prints a text on the screen.

rectangle()
Draws a rectangle, given its starting and ending diagonal co-ordinates.

circle()
Draws a circle, given the coordinates of centre and the radius.

line()
Draws a line, given the starting and ending co-ordinates of the line.

moveto()
Moves the cursor, from one place to the position mentioned in the function.

lineto()
Draws a line from the current position to the co-ordinates specified.

ellipse()
Draws the ellipse using the specified angles and coordinates.

drawpoly()
Draws a polygon.

settextstyle()
Sets the font style. The available fonts are,

1. TRIPLEX_FONT
2. SMALL_FONT
3. SANS_SERIE_FONT
4. GOTHIC_FONT

You may change the direction of the text to be displayed horizontally or vertically using HORIZ_DIR or VERT_DIR respectively.

You may also change the size. The size is from 1 to 10.

setfillstyle()

Sets a style to fill up a shape. Styles available are SOLID_FILL, LINE_FILL, HATCH_FILL, SLASH_FILL etc.

setcolor()
Sets the color

floodfill()
Fills up the selected area with color.


itoa()
Converts from integer to alphabet.

delay()
Causes a delay in the execution of the program. The delay is given in miliseconds.

closegraph()
To close the graphics library.

Tweet