Compilare: user.cpp: In function ‘void cauta(int, int, int)’: user.cpp:45: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void ins(trie*, int, int)’: user.cpp:78: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void search(trie*, int, int)’: user.cpp:94: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void erase(trie*, int, int)’: user.cpp:105: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:111: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:112: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:113: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:117: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:120: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result user.cpp:129: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result In file included from /usr/include/stdio.h:910, from user.cpp:1: In function ‘char* fgets(char*, int, FILE*)’, inlined from ‘int main()’ at user.cpp:120: /usr/include/bits/stdio2.h:253: warning: call to ‘__fgets_chk_warn’ declared with attribute warning: fgets called with bigger size than length of destination buffer