M_calculator

NAME

dnum0(3f) - [M_calculator] return double precision value from string expression using calculator(3f) (LICENSE:PD)

SYNOPSIS

     doubleprecision function dnum0(inline,ierr)

     character(len=*),intent(in) :: inline
     integer,optional,intent(out) :: ierr

DESCRIPTION

DNUM0(3f) is used to return a DOUBLEPRECISION value from a CHARACTER string representing a numeric expression.

• If an error occurs in evaluating the expression INUM(3f) returns zero(0).
• DNUM0(3f) ultimately uses the calculator routine CALCULATOR(3f)

OPTIONS

inline

INLINE is a CHARACTER variable up to (iclen\_calc=255) characters long that is similar to a FORTRAN 77 numeric expression.

ierr

error code. If zero, no error occurred

EXAMPLES

Sample Program

   program demo_dnum0
   use M_calculator, only : dnum0
   doubleprecision x,y,z
   X=DNUM0('20/3.4')
   Y=DNUM0('CI = 10 * sin(3.1416/4)')
   Z=DNUM0('CI')
   write(*,*)x,y,z
   end program demo_dnum0

SEE ALSO

o The syntax of an expression is as described in the main documentation of the Calculator Library. o See EXPRESSION(3f), CALCULATOR(3f), RNUM0(3f), SNUM0(3f).

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