CPP
CPP
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std::boolalpha

std::boolalpha, std::noboolalpha

Defined in header <ios> 
std::ios_base& boolalpha( std::ios_base& str );
 (1) 
std::ios_base& noboolalpha( std::ios_base& str );
 (2)
1) Enables the boolalpha flag in the stream str as if by calling str.setf(std::ios_base::