Help me to understand this program is true or wrong

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/*****************************************************
This program was produced by the
CodeWizardAVR V2.05.0 Evaluation
Automatic Program Generator
© Copyright 1998-2010 Pavel Haiduc, HP InfoTech s.r.l.
[url]http://www.hpinfotech.com[/url]
 
Project : 
Version : 
Date    : 8/25/2012
Author  : Freeware, for evaluation and non-commercial use only
Company : 
Comments: 
 
 
Chip type               : ATmega16L
Program type            : Application
AVR Core Clock frequency: 2.000000 MHz
Memory model            : Small
External RAM size       : 0
Data Stack size         : 256
*****************************************************/
 
#include <mega16.h>
#include<delay.h>
 Alphanumeric LCD Module functions
#include <alcd.h>
                          
                
#define  SCL      PORTC.0
#define  SDA      PORTC.1
#define SDA_HIGH  SDA=1
#define SDA_LOW   SDA=0
#define SCL_HIGH  SCL=1
#define SCL_LOW   SCL=0   
#define RAM_Access 0X00
#define RAM_Tobj1  0x07
#define SA         0x5A
#define EEPROM_Access 0x20 
#define HIGHLEV  3
#define LOWLEV   1
 
 
 
 
 void  START_bit() ;
 void  STOP_bit();
 void  DummyCommand(unsigned char byte);   
void TX_byte(unsigned char);
 void  send_bit(unsigned char bit_out);
 unsigned char Receive_bit(void);
float CalcTemp1(unsigned int data1);
  float CalcTemp1(unsigned int data1);
unsigned char RX_byte(unsigned char RX_buffer,unsigned char Bit_Counter);   
            
 
 
 
void main(void)
{
 unsigned char   SlaveAddress ;  
 unsigned char   command;
 unsigned int   data1,data2;
 float          t1,t2;
 
 
 START_bit();                   
 SlaveAddress=SA<<1;
 
command=RAM_Access|RAM_Tobj1;
 DummyCommand(SlaveAddress);
delay_ms(200);
 
 
STOP_bit();
PORTA=0x00;
DDRA=0xFF;
 
 
// Alphanumeric LCD initialization
// Connections specified in the
// Project|Configure|C Compiler|Libraries|Alphanumeric LCD menu:
// RS - PORTA Bit 0
// RD - PORTA Bit 1
// EN - PORTA Bit 2
// D4 - PORTA Bit 4
// D5 - PORTA Bit 5
// D6 - PORTA Bit 6
// D7 - PORTA Bit 7
// Characters/line: 16
lcd_init(16);
 
while (1)
      {
      
 
      }
}
 
void  START_bit() {
 
 
 SDA_HIGH ;
 
 delay_ms(0.005); 
SCL_HIGH;
delay_ms(0.005);
SDA_LOW;
delay_ms(0.005 );
SCL_LOW;
delay_ms(0.005 );
}
 
void STOP_bit(void)
 {
  SCL_LOW;
  delay_ms(0.005);
  SDA_LOW;
  delay_ms(0.005);
  SCL_HIGH;
  delay_ms(0.005);
  SDA_HIGH;           
  delay_ms(0.005);
  }
  
void send_bit(unsigned char bit_out )
 {  
  if(bit_out==0)
  SDA_LOW;
  else
  SDA_HIGH;
  delay_ms(0.05);
  SCL_HIGH;
  delay_ms(3000);
  SCL_LOW;
  SDA_HIGH;
  } 
  
unsigned char Receive_bit(void)
{ 
  unsigned char  Ack_bit;
  
  SCL_HIGH;
  delay_ms(3000);
  if(SDA==1)
  Ack_bit=1;
  else
  Ack_bit=0;
  SCL_LOW;
  delay_ms(1000);
  return Ack_bit;
 }  
     
 
 
void  TX_byte(unsigned char Tx_buffer)
{
 
    
 
  unsigned char  Bit_counter;
  unsigned char  Ack_bit;
  unsigned char  bit_out;
  
  
  for(Bit_counter=8;Bit_counter>=1;Bit_counter--)
  {   
            if(Tx_buffer&0x80==1)
            bit_out=1;
            else
            bit_out=0;
            send_bit(unsigned char  bit_out );
            Tx_buffer<<=1;
            }
          Ack_bit=Receive_bit();
     }       
              
void DummyCommand(unsigned char Tx_buffer)
{
  START_bit();
  TX_byte(unsigned char  Tx_buffer );
  STOP_bit();
  }   
float CalcTemp1(unsigned int data1)
 {
   float temp1;
   temp1=(data1*0.02)-273.15;
   return temp1;
   }
 
float CalcTemp2(unsigned int data2)
 {
   float temp2;
   temp2=(data2*0.02)-273.15;
   return temp2;
   }
   
unsigned char RX_byte(unsigned char RX_buffer,unsigned char Bit_Counter)
{
  usigned char   RX_buffer;
  unsigned char  Bit_Counter;
 
  
for(Bit_Counter=8;Bit_Counter>=1;Bit_Counter--)
{  
   if(Receive_bit()==1)
   {
     SDA_HIGH;
     RX_buffer<<1;
     }
   else
     {
      SDA_LOW;
      RX_buffer<<=1;
      }
        }
   return RX_buffer;
   }

Code C - [expand]
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L172:Undefined symbol 'unsigned'
L181:Undefined symbol 'unsigned'.
L200:Undefined symbol 'unsigned'.
L201:Must declare first in block