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float ldexp( float arg, int exp );
double ldexp( double arg, int exp );
long double ldexp( long double arg, int exp );
double ldexp( Integral arg, int exp );
 ( C++11)
arg 2 exp.
:
Multiplies an floating point value arg by 2 raised to power exp.
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arg
:
floating point value
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exp
:
integer value
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x×2exp
:
returns x×2exp
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, HUGE_VAL .
:
If the result is too large for the underlying type, range error occurs and HUGE_VAL is returned.
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(C++11)(C++11)
 2
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(C++11)(C++11)(C++11)(C++11)(C++11)(C++11)
 FLT_RADIX
() []
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