File content as of revision 0:6f645104ab31:

#include "mbed.h"
#include "USBKeyboard.h" //making virtual ketboard
#include "USBSerial.h"  //Virtual serial port over USB

 AnalogIn inputx(p20); // input pins 20,19,18 for x,y,z axis of ADXL335 respectively.
AnalogIn inputy(p19);
AnalogIn inputz(p18);
Serial pc(USBTX,USBRX);  //Serial class for transmission of serial data

USBKeyboard keyboard;  // setting variable    
DigitalOut myled1(LED1);
 
int main() {

  int x=0,y=0,z=0,a=0,b=0; // variables for x,y,z axes

  while(1)
 {pc.baud(9600);  //serial communication rate between pc and mbed.
             
  x=inputx*100+1;
  y=inputy*100-2;
  z=inputz*100; 
  myled1=!myled1; 
     
  pc.printf("%d,%d,%d * ",x,y,z);
           
  if(y<=52&&y>=48)
  {
    a=0;    
  }

  if(y>54&&a==0)
  {
    keyboard.keyCode(RIGHT_ARROW);
    a=1;
  }

  if(y<46&&a==0)
  {
   keyboard.keyCode(LEFT_ARROW);
   a=1;
  }
  
  if(x>=48&&x<=52)
  {
    b=0;    
  }
  
  if(x<46&&b==0)
  {
    keyboard.keyCode(DOWN_ARROW);
    b=1;
  }
       
  if(x>54&&b==0)
  {
   keyboard.keyCode(UP_ARROW);
    b=1;
}

 }
        
        }