Compilare: user.cpp: In function ‘std::string Adunare(std::string, std::string)’: user.cpp:9:48: warning: variable ‘p’ set but not used [-Wunused-but-set-variable] int construct[nmax], k = 0, remaining = 0, p; ^ user.cpp: In function ‘std::string Scadere(std::string, std::string)’: user.cpp:62:48: warning: unused variable ‘p’ [-Wunused-variable] int construct[nmax], k = 0, remaining = 0, p; ^ user.cpp: In function ‘std::string Inmultire(std::string, std::string)’: user.cpp:123:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int n = 2; n <= b.size()-i; ++n) { ^ user.cpp:128:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= b.size()-1; ++i) ^ user.cpp: In function ‘std::string Scadere(std::string, std::string)’: user.cpp:98:1: warning: control reaches end of non-void function [-Wreturn-type] } ^