Compilare: main.cpp: In function 'int prefix(Trie*, char*, int)': main.cpp:51:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if(nod->fiu[*s-'a']== 0) ^~ main.cpp:53:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' return prefix(nod->fiu[*s-'a'],s+1,k+1); ^~~~~~ main.cpp: In function 'int main()': main.cpp:59:33: 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:60:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("trie.out","w",stdout); ^ main.cpp:61:22: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(s,32,stdin); ^ main.cpp:69:26: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(s,32,stdin); ^