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Full Discussion: Nonsense error in FORTRAN
Top Forums UNIX for Beginners Questions & Answers Nonsense error in FORTRAN Post 303045973 by AkaAlteir on Monday 20th of April 2020 04:18:33 PM
Old 04-20-2020
Nonsense error in FORTRAN
Hello, I've been trying to set up a code for fortran, it's about integration, the problem comes when I try to compile the program, the log shows 2 errors: "Error: Expected a right parenthesis in expression " 2 times, and only in 1 shows the line in which it's apparently located (32), I'm going crazy cause i can't find the problem, does anyone know what's wrong?, the code is:

Code:
program main
  implicit none
  integer :: n,i,k
  real*8 :: a,b,x,trapecio,s,suma1,suma2,x2,formula1,formula2,eps,div,h

  !variables
  n=3
  a=0d8
  b=4d8


  !calculate the additions 1 a n-1 y 2 a n-2

  suma1=0d0
  suma2=0d0
  do n=3,300,2*n
   h=(b-a)/dble(n)

        do i=1,n-1,2
            x=a+dble(i)*h
            formula1= 1/(1+(x^2))
            suma1=  suma1 + formula1
        end do

        do k= 2,n-2,2
            x2=a+dble(k)*h
            formula2 =1/(1 + (x2^2)
            suma2= suma2+ formula2
        end do

     trapecio= h/3* &
     (1+ 4*suma1 + 2*suma2 + 1(1/n^2))
     div= trapecio/(trapecio/2)
            if (div < 1d-6) then
                exit
            end if

    write(*,*), trapecio
   end do
  end

 

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LEARN ABOUT OSX

glblendequationseparate

GLBLENDEQUATIONSEPAR(3G)					    OpenGL 3.3						  GLBLENDEQUATIONSEPAR(3G)

NAME

       glBlendEquationSeparate - set the RGB blend equation and the alpha blend equation separately

C SPECIFICATION

       void glBlendEquationSeparate(GLenum modeRGB, GLenum modeAlpha);

PARAMETERS

       modeRGB
	   specifies the RGB blend equation, how the red, green, and blue components of the source and destination colors are combined. It must be
	   GL_FUNC_ADD, GL_FUNC_SUBTRACT, GL_FUNC_REVERSE_SUBTRACT, GL_MIN, GL_MAX.

       modeAlpha
	   specifies the alpha blend equation, how the alpha component of the source and destination colors are combined. It must be GL_FUNC_ADD,
	   GL_FUNC_SUBTRACT, GL_FUNC_REVERSE_SUBTRACT, GL_MIN, GL_MAX.

DESCRIPTION

       The blend equations determines how a new pixel (the ''source'' color) is combined with a pixel already in the framebuffer (the
       ''destination'' color). This function specifies one blend equation for the RGB-color components and one blend equation for the alpha
       component.

       The blend equations use the source and destination blend factors specified by either glBlendFunc() or glBlendFuncSeparate(). See
       glBlendFunc() or glBlendFuncSeparate() for a description of the various blend factors.

       In the equations that follow, source and destination color components are referred to as R s G s B s A s and R d G d B d A d, respectively.
       The result color is referred to as R r G r B r A r. The source and destination blend factors are denoted s R s G s B s A and d R d G d B d
       A, respectively. For these equations all color components are understood to have values in the range 0 1.

       +-----------------------------+-----------------------------------------------------+-----------------------------------------------------+
       |			     |							   |							 |
       |			Mode |			       RGB			   |			     Alpha			 |
       |			     | Components					   | Component						 |
       |			     |							   |							 |
       +-----------------------------+-----------------------------------------------------+-----------------------------------------------------+
       |GL_FUNC_ADD		     | <div>						   | <div>						 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |				       Rr		   |				     Ar 		 |
       |			     |				       =		   |				     =			 |
       |			     |							   |							 |
       |			     |						    R	   |						  A	 |
       |			     |						    s	   |						  s	 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						    s	   |						  s	 |
       |			     |						    R	   |						  A	 |
       |			     |							   |							 |
       |			     |						    +	   |						  +	 |
       |			     |						    R	   |						  A	 |
       |			     |						    d	   |						  d	 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						    d	   |						  d	 |
       |			     |						    R	   |						  A	 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |			       </div>			   |			     </div>			 |
       |			     |			       <div>			   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |				       Gr		   |							 |
       |			     |				       =		   |							 |
       |			     |							   |							 |
       |			     |						    G	   |							 |
       |			     |						    s	   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						    s	   |							 |
       |			     |						    G	   |							 |
       |			     |							   |							 |
       |			     |						    +	   |							 |
       |			     |						    G	   |							 |
       |			     |						    d	   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						    d	   |							 |
       |			     |						    G	   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |			       </div>			   |							 |
       |			     |			       <div>			   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |				       Br		   |							 |
       |			     |				       =		   |							 |
       |			     |							   |							 |
       |			     |						    B	   |							 |
       |			     |						    s	   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						    s	   |							 |
       |			     |						    B	   |							 |
       |			     |							   |							 |
       |			     |						    +	   |							 |
       |			     |						    B	   |							 |
       |			     |						    d	   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						    d	   |							 |
       |			     |						    B	   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |			       </div>			   |							 |
       +-----------------------------+-----------------------------------------------------+-----------------------------------------------------+
       |GL_FUNC_SUBTRACT	     | <div>						   | <div>						 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |				       Rr		   |				     Ar 		 |
       |			     |				       =		   |				     =			 |
       |			     |							   |							 |
       |			     |						    R	   |						  A	 |
       |			     |						    s	   |						  s	 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						    s	   |						  s	 |
       |			     |						    R	   |						  A	 |
       |			     |							   |							 |
       |			     |						    -	   |						  -	 |
       |			     |						    R	   |						  A	 |
       |			     |						    d	   |						  d	 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						    d	   |						  d	 |
       |			     |						    R	   |						  A	 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |			       </div>			   |			     </div>			 |
       |			     |			       <div>			   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |				       Gr		   |							 |
       |			     |				       =		   |							 |
       |			     |							   |							 |
       |			     |						    G	   |							 |
       |			     |						    s	   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						    s	   |							 |
       |			     |						    G	   |							 |
       |			     |							   |							 |
       |			     |						    -	   |							 |
       |			     |						    G	   |							 |
       |			     |						    d	   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						    d	   |							 |
       |			     |						    G	   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |			       </div>			   |							 |
       |			     |			       <div>			   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |				       Br		   |							 |
       |			     |				       =		   |							 |
       |			     |							   |							 |
       |			     |						    B	   |							 |
       |			     |						    s	   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						    s	   |							 |
       |			     |						    B	   |							 |
       |			     |							   |							 |
       |			     |						    -	   |							 |
       |			     |						    B	   |							 |
       |			     |						    d	   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						    d	   |							 |
       |			     |						    B	   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |			       </div>			   |							 |
       +-----------------------------+-----------------------------------------------------+-----------------------------------------------------+
       |GL_FUNC_REVERSE_SUBTRACT     | <div>						   | <div>						 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |					   Rr		   |					 Ar		 |
       |			     |					   =		   |					 =		 |
       |			     |							   |							 |
       |			     |							 R |						       A |
       |			     |							 d |						       d |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							 d |						       d |
       |			     |							 R |						       A |
       |			     |							   |							 |
       |			     |							 - |						       - |
       |			     |							 R |						       A |
       |			     |							 s |						       s |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							 s |						       s |
       |			     |							 R |						       A |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |				   </div>		   |				 </div> 		 |
       |			     |				   <div>		   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |					   Gr		   |							 |
       |			     |					   =		   |							 |
       |			     |							   |							 |
       |			     |							 G |							 |
       |			     |							 d |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							 d |							 |
       |			     |							 G |							 |
       |			     |							   |							 |
       |			     |							 - |							 |
       |			     |							 G |							 |
       |			     |							 s |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							 s |							 |
       |			     |							 G |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |				   </div>		   |							 |
       |			     |				   <div>		   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |					   Br		   |							 |
       |			     |					   =		   |							 |
       |			     |							   |							 |
       |			     |							 B |							 |
       |			     |							 d |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							 d |							 |
       |			     |							 B |							 |
       |			     |							   |							 |
       |			     |							 - |							 |
       |			     |							 B |							 |
       |			     |							 s |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							 s |							 |
       |			     |							 B |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |				   </div>		   |							 |
       +-----------------------------+-----------------------------------------------------+-----------------------------------------------------+
       |GL_MIN			     | <div>						   | <div>						 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |					   Rr		   |					 Ar		 |
       |			     |					   =		   |					 =		 |
       |			     |							   |							 |
       |			     |					       min	   |					     min	 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						       R   |						     A	 |
       |			     |						       s   |						     s	 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						       R   |						     A	 |
       |			     |						       d   |						     d	 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |				   </div>		   |				 </div> 		 |
       |			     |				   <div>		   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |					   Gr		   |							 |
       |			     |					   =		   |							 |
       |			     |							   |							 |
       |			     |					       min	   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						       G   |							 |
       |			     |						       s   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						       G   |							 |
       |			     |						       d   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |				   </div>		   |							 |
       |			     |				   <div>		   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |					   Br		   |							 |
       |			     |					   =		   |							 |
       |			     |							   |							 |
       |			     |					       min	   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						       B   |							 |
       |			     |						       s   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						       B   |							 |
       |			     |						       d   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |				   </div>		   |							 |
       +-----------------------------+-----------------------------------------------------+-----------------------------------------------------+
       |GL_MAX			     | <div>						   | <div>						 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |					   Rr		   |					 Ar		 |
       |			     |					   =		   |					 =		 |
       |			     |							   |							 |
       |			     |					       max	   |					     max	 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						       R   |						     A	 |
       |			     |						       s   |						     s	 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						       R   |						     A	 |
       |			     |						       d   |						     d	 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |				   </div>		   |				 </div> 		 |
       |			     |				   <div>		   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |					   Gr		   |							 |
       |			     |					   =		   |							 |
       |			     |							   |							 |
       |			     |					       max	   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						       G   |							 |
       |			     |						       s   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						       G   |							 |
       |			     |						       d   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |				   </div>		   |							 |
       |			     |				   <div>		   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |					   Br		   |							 |
       |			     |					   =		   |							 |
       |			     |							   |							 |
       |			     |					       max	   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						       B   |							 |
       |			     |						       s   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |						       B   |							 |
       |			     |						       d   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |							   |							 |
       |			     |				   </div>		   |							 |
       +-----------------------------+-----------------------------------------------------+-----------------------------------------------------+

       The results of these equations are clamped to the range 0 1.

       The GL_MIN and GL_MAX equations are useful for applications that analyze image data (image thresholding against a constant color, for
       example). The GL_FUNC_ADD equation is useful for antialiasing and transparency, among other things.

       Initially, both the RGB blend equation and the alpha blend equation are set to GL_FUNC_ADD.

NOTES

       The GL_MIN, and GL_MAX equations do not use the source or destination factors, only the source and destination colors.

ERRORS

       GL_INVALID_ENUM is generated if either modeRGB or modeAlpha is not one of GL_FUNC_ADD, GL_FUNC_SUBTRACT, GL_FUNC_REVERSE_SUBTRACT, GL_MAX,
       or GL_MIN.

ASSOCIATED GETS

       glGet() with an argument of GL_BLEND_EQUATION_RGB

       glGet() with an argument of GL_BLEND_EQUATION_ALPHA

SEE ALSO

       glGetString(), glBlendColor(), glBlendFunc(), glBlendFuncSeparate()

COPYRIGHT

       Copyright (C) 2006 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication
       License, v 1.0, 8 June 1999.  http://opencontent.org/openpub/.

OpenGL 3.3							    03/08/2011						  GLBLENDEQUATIONSEPAR(3G)
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