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If you have to count numbers of 1 in a 32 bit word. Other than checking every other bit or dividing the bits is 4 parts and then using lookup table. What will be some other most efficent way ? 
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In the following snippet of code the compiler (g++ on RH 4) does not see my overloaded operator. I cannot figure out why. Error: parse_opra.cpp: In function `void parseFile(std::istream&)': parse_opra.cpp:19: error: no match for 'operator>>' in 'in >> rec' note: candidates are: std::basic_istream<_CharT,...... ..... opra_record.h:35: note: std::istream& operator>>(std::istream&, Opra_record&) I …
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