Compilare: main.cpp: In function 'void ad_cuv(char*, nod*, int)': main.cpp:20:8: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz==strlen(w)) ~~~^~~~~~~~~~~ main.cpp:22:8: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz<strlen(w)) ~~~^~~~~~~~~~ main.cpp: In function 'bool del_cuv(int, nod*, char*)': main.cpp:32:8: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz==strlen(w)) ~~~^~~~~~~~~~~ main.cpp: In function 'void print_nrcuv(char*)': main.cpp:60:11: 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:61:25: 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:67:11: 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++); ~^~~~~~~~~~