[AVR] Help me on Atmega32 interface with SHT25 sensor through I2C protocol !!!

Code C - [expand]
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#include <inttypes.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/sleep.h>
#include <util/delay.h>
 
 
void i2c_init (void)
{
    TWSR = 0x00;
    TWBR = 0x47;
    TWCR = 0x04;
}
 
void i2c_start (void)
{
    TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN);
    while ((TWCR & (1<<TWINT)) == 0);
}
 
void i2c_write (unsigned char data)
{
    TWDR = data;
    TWCR = (1 << TWINT) | (1 << TWEN);
    while ((TWCR & (1<<TWINT)) == 0);
}
 
unsigned char i2c_read (unsigned char isLast)
{
    if (isLast == 0)
        
    TWCR = (1 << TWINT) | (1 << TWEN) | (1 << TWEA);
    
    else
    
    TWCR = (1<<TWINT) | (1<<TWEN);
    
    while ((TWCR & (1 << TWINT)) == 0);
        
    return TWDR;
}
 
void i2c_stop()
{
    TWCR = (1 << TWINT) | (1 << TWEN) | (1 << TWSTO);
}
 
int main()
 { 
unsigned char i = 0;
     DDRA = 0xFF;
     i2c_init();
     i2c_start();
     i2c_write(0b00000101);
     i=i2c_read(1);
     PORTA = 1;
     i2c_stop();
     
     while(1);
        return 0; 
 }