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Thank you for the help!!! Please don't be running out fo good mood, obviously the "art of programming" is beyond my skills, at this moment, but hpefully I'll advance in it.... but the progress is really slow... Best regards!!!

Here is the code, I've tried to fix the things, but no success :( The text file is still empty IMPLICIT DOUBLE PRECISION (A-H,O-Z) PARAMETER (NR=100) DIMENSION U(NR) open(UNIT=13,STATUS='new',file='dU_by_dT.txt') NIT=2500 jprint=500 KPRINT=1...

Thank you, I've done this : open(UNIT=13,STATUS='new',file='dU_by_dT.TXT') and at the end of the program write(UNIT=13,FMT=*) 'Z,T,U' write(unit=13,FMT=*) Z,T,U And it creates a text document named dU_by_dT, but there are only Z,T,U as head of column, but there are no data. When I start the...

Hello everyone salgerman - yes I've created a subfolder named "dU_dT", because windows does not accept the "/". At this folder I can just find some .dat files, an application file named source and an F file. I was wondering, why there is no text file with the reuslts of the calculations... This...

Excuse me for the repost, but I've forgotten to post the new source code. If it is interessting, I could explain, what is the exact purpose of my Fortran "battle". The source code: IMPLICIT DOUBLE PRECISION (A-H,O-Z) DIMENSION U(100) open(unit=3,file='du/dt.DAT') NIT=2000...

Really thank you all for the responses, they are really usefull!!! I've done some corrections on the source, now it works, but when I open the folder, where should be stored the results from the calculations, there are only F.files and application... I thought, that when I enter the...

Hello everyone It took a long time, but I had to do some other things, about my project. The project describes the process of diffusion of an acid gas, with a freely falling drop of an alkalyne solution. One of the basics in the transport phenomena. That's why I was talking about dimensionless...

No, I already have created a code, for some pde-s and an itegral, but if I include this equation in the "original" source code for the pde-s I think, that I'm going to mess things, because I'm working with a dimensionless time, but for the ODE, have to transfer from dimensionless to a "normal"...

Hello everyone I would like to ask you for some help with a Fortran source code. I have to make a program, which solves numerically an ordinary differential equation and after that an integral. The equation, is going to be solved using the finite difference approximation. This is equation...