cleardevice() function in C

The header file graphics.h contains cleardevice() function which clears the screen in graphics mode and sets the current position to (0,0). Clearing the screen consists of filling the screen with current background color.

Syntax :

void cleardevice();

Below is the implementation of cleardevice() in C:



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code

// C Implementation for cleardevice()
#include <graphics.h>
  
// driver code
int main()
{
    // gm is Graphics mode which is
    // a computer display mode that
    // generates image using pixels.
    // DETECT is a macro defined in
    // "graphics.h" header file
    int gd = DETECT, gm;
  
    // initgraph initializes the
    // graphics system by loading a
    // graphics driver from disk
    initgraph(&gd, &gm, "");
  
    // set the background colour as GREEN
    setbkcolor(GREEN);
  
    // outtext function displays
    // text at current position.
    outtext("Press any key to clear the screen.");
  
    getch();
  
    // cleardevice function
    cleardevice();
  
    outtext("Press any key to exit...");
  
    getch();
  
    // closegraph function closes the
    // graphics mode and deallocates
    // all memory allocated by
    // graphics system .
    closegraph();
  
    return 0;
}

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Output:

On executing the program, the output window looks like :

On pressing any key :

To exit, press any key.



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