To compile and run the examples use one of these example commands: g++ -std=c++11 eventlog.cpp && ./a.out g++ -std=c++11 eventlog.cpp -o eventlog && ./eventlog PS: Use g++ instead of gcc for compiling C++ code: g++ -Wall -W -Werror tex.cpp -o tex gcc does not link stdc++ library by default which is required for your code.