Compilare: user.cpp: In function ‘int main()’: user.cpp:43:27: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(A, MAX_LEN + 1, f); ^ user.cpp:45:35: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(A + n + 1, MAX_LEN + 1, f); ^