Compilare: user.cpp: In function ‘int strcmp(std::string, std::string)’: user.cpp:12:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=a.size();i++) ^ user.cpp: In function ‘int verificare(std::string, std::string)’: user.cpp:22:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=a.size();i++) ^ user.cpp:25:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1;j<=b.size();j++) ^ user.cpp: In function ‘int main()’: user.cpp:48:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s.size()>max) ^ user.cpp:54:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s.size()==max) ^ user.cpp: In function ‘int strcmp(std::string, std::string)’: user.cpp:18:1: warning: control reaches end of non-void function [-Wreturn-type] } ^