Fortran function "abs"

[consideration]

hi,

can someone explain me the function "abs" of
the Fortran 77 language.
i have to transform it to a c++ function, but i
even don't know what "abs" does and how it is
built.

THANKS in Advance

 

[zeitghost]

I think it just returns the absolute value of a number.

abs probably works with floating point numbers (real*4)

iabs works with integers.

so abs( -31.0) gives 31.0.

 

[xwb]

C++ equivalents just to confuse you

Fortran abs = C++ fabs
Fortran iabs = C++ abs