Compilare: user.cpp: In function 'std::string Intersectie(std::string, std::string)': user.cpp:17: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int main()': user.cpp:57: warning: format '%s' expects type 'char*', but argument 3 has type 'char (*)[210]' user.cpp:60: warning: comparison between signed and unsigned integer expressions