c++ - inconsistent behavior of <iomanip> -


i have following code

cout << setfill('0') << setw(4) << hex << 100 << 100 << std::endl;

the output is:

006464

if want let every number width 4, have use 

out << setfill('0') << setw(4) << hex << 100 << sew(4) << 100 << std::endl;

but if want print every number hex , setfill('0'), need set setfill('0') , std::hex once.

does c++ design on purpose? intention?

yes on purpose. stream operations internally peppered resets of field width, specified standard. think there's no answer why.


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