Compilare: user.cpp: In function ‘void parcurg(TRI*)’: user.cpp:28:78: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (map<char,struct tri*> ::iterator it=p->c.begin(); tr<=p->c.size() && it!=p->c.end(); ++it,++ tr) ^ user.cpp: In function ‘int main()’: user.cpp:45:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int xc=0; xc<=x.length()-1; xc++) ^ user.cpp:48:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=xc; i<=x.length()-1; i++) ^ user.cpp:77:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int xc=0; xc<=x.length()-1; xc++) ^ user.cpp:81:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=xc; i<=x.length()-1; i++) ^