plz tell me c programm code that finds the number of zeros in 8 bit deta item.

 

Look up Hamming weight. For a single byte, constructing a lookup table is always an option, as it's simple and fast.

 

What do you mean with zeros? You mean bits that are zero or zeros in the decimal representation?

 

uint8_t bits_that_are_zero(uint8_t num)
{
  return low_bits_that_are_zero(num)
           + low_bits_that_are_zero(num>>4);
}

uint8_t low_bits_that_are_zero(uint8_t num)
{
  uint8_t zeros;
  num &= 0xF;
  
  zeros = (~num)&0x3;

  if(zeros < 2)
    zeros += 1;

  if(num < 4)
    zeros += 1;
  else if(num >=12)
    zeros -= 1;

  return zeros;
}