Compilare: user.cpp: In function ‘void adaug(Trie*, char*, int)’: user.cpp:22:14: warning: NULL used in arithmetic [-Wpointer-arith] if(*v == NULL) return; ^ user.cpp: In function ‘void adaugSir(Trie*, char*, int)’: user.cpp:37:28: warning: NULL used in arithmetic [-Wpointer-arith] for(int i = 0; v[i] != NULL; i++) ^ user.cpp:40:18: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] v[i + 1] = NULL; ^ user.cpp: In function ‘int main()’: user.cpp:67:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp:68:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sub.in", "r", stdin); ^ user.cpp:69:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sub.out", "w", stdout); ^ user.cpp:70:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &na); ^ user.cpp:73:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", sir); ^ user.cpp:76:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &nb); ^ user.cpp:79:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", sir); ^