Compilare: user.cpp: In function ‘int main()’: user.cpp:90:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < wordLength; ++ i) { ^ user.cpp:95:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < wordLength; ++ i) { ^ user.cpp:103:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = wordLength; i < strLength; ++ i) { ^ user.cpp:63:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("abc2.in", "r", stdin); ^ user.cpp:68:35: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(buffer, 10000001, stdin); ^