GRASS and C++

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Calling GRASS library functionality in C++

For working examples, see:

I/O:

• lib/iostream/

Raster data processing

• raster/r.terraflow/

Image processing

• imagery/i.atcorr/

Visualization:

• visualization/xganim/
• visualization/wximgview/

Notes

C++ code that use C shared libraries needs to specify this fact to the compiler. This can be defined with the extern "C" keyword, in this way:

extern "C" 
{
#include <grass/gis.h>
}

The C++ compiler will understand that the functions defined in gis.h are coded in C. If it is not specified the linking step will throw an error stating that the symbols for the C functions were not found in the shared library.

See also

• GRASS and Python