Compilare: user.cpp: In function ‘void add_in_trie(char*)’: user.cpp:26:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(sirul);++i) ^ user.cpp: In function ‘void srch_in_trie(char*)’: user.cpp:54:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(sirul);++i) ^ user.cpp: In function ‘void srch_in_trie_finale(char*)’: user.cpp:76:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(sirul);++i) ^ user.cpp: In function ‘int main()’: user.cpp:109:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(sirul);++i) ^