Re: Doubt about formula transcription

On 7 avr, 22:09, "Michael Metcalf" <michaelmetc...@xxxxxxxxxxxxxx>
wrote:
"Leonardo Marques" <surf...@xxxxxxxxx> wrote in message

news:9c4bdee7-084e-4644-8b90-74cbef524878@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

hey guys,

im with a little problem when im transcripting a math formula from
maple to fortran, because when i put a solution on the equation, i got
a result diferent from zero.

The formula is: 2*arctan(sin(a)*cos(a)/(.8-cos(a)^2))-4/9*Pi ;
I've transcripted to fortran as: 2*atan((sin(a)*cos(a))/(0.8-
cos(a)**2))-((pi)*4/9)

I don't know Maple, but in Fortran 4/9 gives zero. Try 4.0/9.0.

Regards,

Mike Metcalf

I don't agree : (pi)*4/9 is computed as ((pi)*4)/9) and this is OK.

But the "parameter(k=0.8" is strange, k being no declared REAL !
.

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