Compilare: main.cpp: In function 'void ad_cuv(char*)': main.cpp:31:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(w);i++) ~^~~~~~~~~~ main.cpp: In function 'void del_cuv(char*, nod*, nod*, int, int)': main.cpp:68:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pas2==strlen(w)) ~~~~^~~~~~~~~~~ main.cpp:72:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pas2<strlen(w)) ~~~~^~~~~~~~~~ main.cpp: In function 'void print_nrcuv(char*)': main.cpp:95:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(w)&&aux->fii[w[i]-'a']!=NULL;aux=aux->fii[w[i]-'a'],i++); ~^~~~~~~~~~ main.cpp:97:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] g<<(aux->nr_cuvinte)*(i==strlen(w))<<'\n'; ~^~~~~~~~~~~ main.cpp: In function 'void prefix_maxim(char*)': main.cpp:109:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(w)&&aux->fii[w[i]-'a']!=NULL;aux=aux->fii[w[i]-'a'],i++); ~^~~~~~~~~~