Compilare: user.cpp: In function ‘int main()’: user.cpp:34:27: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(a, MAX_LEN + 2, f); ^ user.cpp:35:27: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(b, MAX_LEN + 2, f); ^