compilation error

[mjlegaz...@gmail.com]

Hello.

I am very new in programing and in use fortran an g95. I use g95 in windows.

The part of the program that I am trying to compile is:

implicit none

real:: s, x(N), p(N)

integrando=0.5*(p(1)+4.72*x(1)*x(2))**2+0.5*(p(2)+4.72*x(1)*x(2)+3.e+09*x(3)*x(2)-4.72*x(6))**2

integrando=integrando+0.5*(p(3)+3.e+09*x(3)*x(2)-1.5.e+04*x(3)*x(5)+8.e+07*x(3)**2-4.72*x(1)*x(2))**2

integrando=integrando+0.5*(p(4)-3.e+09*x(3)*x(2))**2+0.5*(p(5)+1.5e+04*x(5)*x(3))**2

integrando=integrando+0.5*(p(6)+1.5.e+04*x(5)*x(3)+x(6))**2+0.5*(p(7)+4.e+07*x(3)**2)**2

end function 

The compiler give me an error : expected a right parenthesis in expression at (1)

This error appear after two lines:

integrando=integrando+0.5*(p(3)+3.e+09*x(3)*x(2)-1.5.e+04*x(3)*x(5)+8.e+07*x(3)**2-4.72*x(1)*x(2))**2

integrando=integrando+0.5*(p(6)+1.5.e+04*x(5)*x(3)+x(6))**2+0.5*(p(7)+4.e+07*x(3)**2)**2

I attach a file with the image of error.

I revised the  parentheses several times. I can not see a wrong parenthesis.

I would very grateful if someone could help me.

Really grateful

Thank you so much.

María José

[Darius Markauskas]

The error is shown in your screenshot:
"1.5.e"

It should be "1.5e" or just "1.5".

And better use Gfortran instead of G95.

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[mjlegaz...@gmail.com]

Hello Darmar.

Thank you very much for your answer.

The program has compiled without errors

What are the advantages of Gfortran?

Now, my problem is that the results are not that should be, I do not know why?. I ran the same program with other function and it worked.

Please, if some Fortran user it is interested in help me please send me an email. 

Thank you again Darmar.

[Darius Markauskas]

"What are the advantages of Gfortran? "

G95 is not developed / actively maintained anymore.

[Walt Brainerd]

How are your results wrong?

In numerical computations using different compilers and different hardware,

you must expect answers to differ.

If the answer is completely different, it can be because of errors in the program

or an unstable algorithm.

It is possible, but very unlikely, that there is a bug in the compiler.

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Walt Brainerd

[ziggy76]

Hello,

What do you mean by 'I ran the same program with other function and it worked.' ?
Without more information, it's impossible to help you.
Most of the time the source of the problem is a little typing mistake like the previous one.

Regards

[mjlegaz...@gmail.com]

Hello.

Thank you Darmar for your answer.

Thank you Walt and Ziggy76. The problem was a  mistake in the program.

Would like to ask another question.

I know that squaring is written:  x**2

My question is if the next two expression are correct:

x(2)**0.5+x(1)

x(2)**-0.5

I mean when I have to raise to 0.5 or -0.5. How I should write this?

Thank you so much, again.

María José

El lunes, 29 de enero de 2018, 7:15:30 (UTC+1), mjlegaz...@gmail.com escribió:

[ziggy76]

I think the best way is like this example :

print *,9.0**(-0.5)


which gives the good answer :

  0.333333343

When you have a question like this one, just try.
A simple test program is just 2 lines long :


print *,9.0**(-0.5)
end

Regards

[María José Legaz Almansa]

Hello .

Thank you for you answer ziggy76. Thank you very much.

I have another problem of compilation.

I attach the file "mio" with the part of program which I am trying to compile.

I attach the image of the error in the compiler.

I would very grateful if someone could help me.

Really grateful

Thank you so much.

María José

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[John S. Urban]

Your source lines are longer than 132 columns. That is why the messages are warning that the lines are being truncated.  Although there are often compiler options to allow lines to be longer than the standard limit of 132, you should break your lines up and use continuation lines.

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[María José Legaz Almansa]

Hello John.

I have used & to break lines  and it have worked.

Thank you so much

María José

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[jfh]

On Wednesday, January 31, 2018 at 1:05:19 AM UTC+13, darmar wrote:

"What are the advantages of Gfortran? "

G95 is not developed / actively maintained anymore

True but I still use it with other compilers because (a) its error messages may be easier to understand, or (b) it may find a bug that others miss, or (c) it may run a correct program faster. It's usually good on f2003 or earlier Fortran, but I have a list of 6 unfixed g95 bugs at http://homepages.ecs.vuw.ac.nz/~harper/g95bugs