[greg@Uranus:~/WRF/WPS/data/SRTM_conversion]$ nm write_geogrid.o
U __stack_chk_fail
U __strncpy_chk
U fclose
U fopen
U free
U fwrite
U malloc
00000000 T write_geogrid
Location: Saint Paul, MN USA / BSD, CentOS, Debian, OS X, Solaris
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Hi.
You can see now that Fortran compiles the external link name as:
Code:
undefined reference to `write_geogrid_'
but gcc is compiling the name as:
Code:
00000000 T write_geogrid
You can try adding the underscore to the name in the c code, but I'm guessing that that you will need to work on the binding relationship that is the Fortran-95 standard. That will also affect how memory items are thought to be arranged between Fortran and c.
But try changing the name in the c code first to see what that does ... cheers, drl
Ok I add a '_' to the write_geogrid in the c code. Now the compilation seems ok because there is no errors. But when I'm executing I have this error:
Code:
[greg@Uranus:~/WRF/WPS/data/SRTM_conversion]$ ./rd_wr_formatted.exe srtm_35_05.asc
At line 66 of file rd_wr_formatted.f90 (unit = 10, file = 'srtm_35_05.asc')
Fortran runtime error: Bad value during floating point read
Location: Saint Paul, MN USA / BSD, CentOS, Debian, OS X, Solaris
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Hi.
Are you sure that the data file has 12,001 data items on a line? (I think that's what that means.)
Code:
33 format(f6.1, 12000f7.1)
if so, nx and ny at 1200 seem less than necessary.
Otherwise, what is the intention?
In any case, for debugging a program until you feel it is correct, I suggest that you use compiler-supplied tests, such as -fbounds-check -- see man gfortran for details ... cheers, drl
---------- Post updated at 16:36 ---------- Previous update was at 09:09 ----------
Hi.
In looking over your program again, and with writing a small test case, I think the format 33 with 12000f7.1 is probably OK, provided that there are enough legitimate values to satisfy 1200 values for 1200 lines. Your write statement inside the reading loop will probably print nx+1 for i because it was recently used in the implicit loop.
I think that means we need to look at a sample of the real data file. I was able to obtain this error message:
Code:
At line 15 of file three.f90 (unit = 10, file = 'data1')
Fortran runtime error: Bad value during floating point read
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