Expected a right parenthesis in expression

Question

xic = ac * x**2.D0 * ( (1.D0 / 3.D0) * (1.D0 - x) *  
      (1.D0 + 10.D0 * x + x** 2.D0) +  2.D0 * x * 
      (1.D0 - x) * Log(x) )

I was compiling the above code with fortran and got one error

Expected a right parenthesis in expression at (1)

what should i do?

Solution 1

You are missing line continuation characters. They differ slightly for free and fixed form Fortran. For free form, you need to use & at the end of the line:

xic = ac * x**2.D0 * ( (1.D0 / 3.D0) * (1.D0 - x) * &
                       (1.D0 + 10.D0 * x + x** 2.D0) &
                       + 2.D0 * x * (1.D0 - x) * Log(x) )

For fixed-format this can be done by e.g. & at the sixth column of the following line:

      xic = ac * x**2.D0 * ( (1.D0 / 3.D0) * (1.D0 - x) * 
     &                  (1.D0 + 10.D0 * x + x** 2.D0) 
     &                  + 2.D0 * x * (1.D0 - x) * Log(x) )

Alternatively, you can extend the maximum allowed characters by using (gfortran) -ffree-line-length-0 or -ffixed-line-length-0.

Solution 2

Check the following methods to cut a long line in Fortran : http://www.cs.mtu.edu/~shene/COURSES/cs201/NOTES/chap01/continue.html