fortran - What's wrong with my line continuation syntax? -

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in project i've been assigned i'm asked compile code f77, , i'm trying grip on how handle 72 characters per line limit. i'd write following line of code:

!use numbers check indentation... !2345678901234567890                   mpi_send(slave, 1, mpi_integer, slave, mpi_any_tag, mpi_comm_world, ierr)

the long indentation before because line inside couple of blocks, , i'd solve without having sacrifice code indentation (i.e. readability).

as is, code truncated after mp in mpi_comm_world, thought i'd break line, , add line continuation character in column 6. i've seen examples on net both + , integer digits line continuation characters, i've tried both following versions:

!2345678901234567890                   mpi_send(slave, 1, mpi_integer, slave, mpi_any_tag,      1              mpi_comm_world, ierr)                   mpi_send(slave, 1, mpi_integer, slave, mpi_any_tag,      +              mpi_comm_world, ierr)

both of them give me compile error on first line, saying

                  mpi_send(slave, 1, mpi_integer, slave, mpi_any_tag,                      1 error: unclassifiable statement @ (1)

the code resides in code file named pi.f, i'm compiling make pi , have (only) following in makefile:

fc = mpif77  fflags=-wall

make shows me actual command compile file is

mpif77 -wall pi.f -o pi

what doing wrong here? how make work?

before worrying line continuation syntax issues may (or may not) have, suggest attend error message compiler. mpi_send subroutine, not function nor command, it's use should preceded keyword call.


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