Compilare: user.cpp: In function ‘void strmatch()’: user.cpp:19:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2;i<=strlen(a+1);++i) ^ user.cpp:28:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1,c=0;i<=strlen(b+1);++i) ^ user.cpp: In function ‘void afisare()’: user.cpp:49:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v.size();++i) ^