Compilare: user.cpp: In function ‘int main()’: user.cpp:69:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(w);i++){ ^ user.cpp:65:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("evaluare.in", "r", stdin); ^ user.cpp:66:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("evaluare.out", "w", stdout); ^