Please help in the language C

#include <mega16.h>

// Alphanumeric LCD Module functions
#asm
   .equ __lcd_port=0x18
#endasm
#include <lcd.h>

// Declare your global variables here

void main(void)
{

// Port A 
PORTA=0x00;
DDRA=0x00;

// Port B 
PORTB=0x00;
DDRB=0x00;

// Port C 
PORTC=0x00;
DDRC=0x00;

// Port D 
PORTD=0x00;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer 1 Stopped
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: TOSC1 pin
// Clock value: PCK2/128
// Mode: Normal top=FFh
// OC2 output: Disconnected
TCCR2=0x05;
ASSR=0x08;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
GICR=0x00;
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
// Analog Comparator Output: Off
ACSR=0x80;
SFIOR=0x00;

// LCD module initialization
lcd_init(16);

while (1)
      {
      // Place your code here

      };
}

struct TIME_DATE {
     int  hour;
     int  minute;
     int  second;
     int  month;
     int  day;
     int  year;
} time;

bit editing;  // Time being edited flag 


// return max day for a given month ..
const char flash MAX_DAY[13] = { 0,31,28,31,30,31,30,31,31,30,31,30,31 };

 
//  Timer 2 overflow interrupt service routine ..
//  This is used to keep ( Real Time ) and happens every 1 second ..
interrupt [TIM2_OVF] void timer2_ovf_isr (void)
{
   if ( editing )  	// time is being edited.. so don't update it!!
        return ; 
   if ( ++time.second > 59 )      // count up seconds
   
          {   
                time.second = 0;  // enough for a minute?
   if ( ++time.minute > 59 )
   
          {  
                time.minute = 0;  // enough for a hour?
   if ( ++time.hour > 23 )
   
          {
                time.hour = 0;   // enough hours for a day?
   if ( ++time.day > MAX_DAY )
           {    
                 time.day = 1;   // enough days for this month?
   if ( ++time.month > 12 )
               
           {
                 time.month = 1; // another year gone by..
   if ( ++time.year )
   
           {
                time.year = 1;       
           }
         }
       }
     }
   }
 } 
}