Recent content by cramie10

  1. C

    Fortran Fortran Functions: How Are Variables Passed Around?

    Excellent answers. I can't thank you all enough! As I say, I'm new to the FORTRAN business but everyone has been perfectly explanatory and helpful. I'll have to come back here more often :)
  2. C

    Fortran Fortran Functions: How Are Variables Passed Around?

    Thanks for the answer, qsal. Very informative. Although I do then have a couple of follow up questions. I'm assuming that if you don't declare a variable ahead of time, the variable does still need to be declared somewhere in the program? Would FORTRAN77 throw up an error if you did not do...
  3. C

    Fortran Fortran Functions: How Are Variables Passed Around?

    Hi all Just to start with I should highlight my general ineptitude with programming, so I apologize if my question is totally basic. I have a program written (by someone else) in fortran 77. Contained within it is a call to a function which acts on a number of variables. My curiosity is about...
  4. C

    What is the correct derivative of sin 5x?

    Differenciating Sin and Cos is very easy. (It gets trickier with the more complicated trig functions, like Tan). The way I like to remember it, is as follows: Sin(x) Cos(x) -Sin(x) -Cos(x) When you differenciate one of these functions, you simply move down the tower to the next function. When...