Code coverity using GCC gcov

Create a cpp source file with main function and name it main.cpp

Build source with gcov enabled

g++ -Wall -fprofile-arcs -ftest-coverage main.cpp

                It will generate main.gcno file

Run binary

                ./a.out

                It will generate main.gcda file

Run gcov for the source file

                gcov main.cpp

                it will generate main.cpp.gcov file

Open main.cpp.gcov and analyse ##### lines for un tested code lines.