1. dfor.lib Link error LNK2005 in Visual C++ & Visual Fortran.
2. LIBCD.lib error LNK2005 ... libc.lib in Visual C++ & Visual Fortran.
3. dumpbin /symbols aa.obj to get real interfaces in aa.obj.
4. Two dimension array in c/c++, and its calling by fortran code.
5. Runtime error R6002: "floating-point support not loaded" in Visual C++.
6. Link c++ and fortran in GNU (or SUN) C++ & F77.
7. Incompatibles in Visual Fortran with GNU (SUN) F77.
8. fseek/ftell problem for text mode in Unix & Dos ascii format.
9. Incompatibles in Visual C/C++ with GNU (SUN) C/C++.

Tips

1. dfor.lib Link error LNK2005 in Visual C++ & Visual Fortran.
   The link error as:
   

   dfor.lib(matherr.obj) : error LNK2005: __matherr already defined in LIBCD.lib (matherr.obj)

   Answer: Make sure you place "dfor.lib" after all user libraries and before system libraries in menu "project"/"setting" => "link" => "Object/library modules".

2. LIBCD.lib error LNK2005 ... libc.lib in Visual C++ & Visual Fortran. .
   Answer: ignore "libc.lib" in link of setting.

3. dumpbin /symbols aa.obj to get real interfaces in aa.obj.

4. Two dimension array in c/c++, and its calling by fortran code.
   In C++ to dynamically create a two (or high) dimension array, the definition should be like: 

         float (*aaa)[100] = new float[nsize][100];

   When pass above array in function, the real format in C/C++ is "funcs(float[][100]);" but not " funcs(float**);". So to call this function in Fortran, it must be passed as two dimensional array, but can not be passed as pointer's pointer. Here is an example in Fortran:

         subroutine funcs(aaa)
         aaa(100, nsize)
         ...
         end

5. Runtime error R6002: "floating-point support not loaded" in Visual C++. .
   Resolution: Initialize the floating-point variable or use the variable in an expression in the routine that contains the scanf() call.

6. Link c++ and fortran in GNU (or SUN) C++ & F77.

   (1) by g++:

   g++ *.o -o exe -lg2c -lm ## -lg2c must be after *.o; or use -lf2c

   (2) by f77 (or g77)

   f77 -lstdc++ *.o -o exe

7. Incompatibles in Visual Fortran with GNU (SUN) F77.

   • Can not use Rewind in binary file.
   • recl in open(...) should be 1/4 of the file size, but be the file size in other f77.
   • ... ... ... ...(too many)

8. fseek/ftell problem for text mode in files of Unix & Dos ascii format.

   • If fseek/ftell is used in C/C++ program, the text file opened by the program should have same plateform format as the executive program. e.g., the program is compiled in win/dos, the opened ascii file should be in dos ascii format.

9. Incompatibles in Visual C/C++ with GNU (SUN) C/C++.

   • To open a binary file, mode "b" must be used in fopen of Visual C/C++.
   • To open a binary file, mode "ios::binary" must be used in fstream of Visual C/C++.
   • ... ... ... ...(too many)