Compilare: main.cpp: In function 'int del(Trie*, int)': main.cpp:21:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k==strlen(sir)-1)nod->EndW--; ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:40:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("trie.in","r",stdin); ^ main.cpp:42:26: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(linie,25,stdin); ^ main.cpp:111:30: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(linie,25,stdin); ^