Compilare: user.cpp: In function ‘int main()’: user.cpp:37:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i < str.length()) ^ user.cpp:45:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] }while(i < str.length()); ^ user.cpp: In function ‘void tabla(int*, std::string)’: user.cpp:68:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while( pos < cuv.length() ) ^ user.cpp: In function ‘int srch(int, std::string, std::string, int*)’: user.cpp:92:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while( (m+i) < str.length() ) ^ user.cpp:95:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i == cuv.length()-1) ^