#include <p18f4620.h>
 
#pragma config OSC = HS
#pragma config WDT = OFF
#pragma config LVP = OFF
 
#define btn_on    PORTBbits.RB4
#define btn_off  PORTBbits.RB5
#define led        PORTAbits.RA0
 
void on(void);
void off(void);
 
void main(void)
{
             TRISA = 0;                  //set Port A(LED) as output
             PORTAbits.RA0 = 0;  //reset LED
    
             while(btn_on != btn_off)        //wait for btn press
    
    if (btn_on = 1)  //btn on pressed
    on();
 
    if (btn_off = 1)    //btn off pressed
    off();
}
 
    void on(void)
    {
              while(!btn_on);        //wait for btn(RB4) released
              PORTAbits.RA0 = 0x0F;  //on LED
    }
    
    void off(void)
    {
             while(!btn_off);         //wait for btn(RB5) released
              PORTAbits.RA0 = 0x00;  //off LED
    }