application of c++ in civil engineering

C++ programming is useful in calculation of structures (steel,concrete and other), being an add-on to any FEM (Finite Element Method) program, which is able to produce textual output. Develop finite element stress analysis programs, that work with free cad systems(Maybe QCad). A computational toolkit for the interactive matrix and finite element analysis of large engineering structures, particularly building and highway bridge structures

well i dont think there is such great applications of cpp in the field of civil engineering :)perhaps you have more cad applications