Compilare: user.cpp: In function ‘int main()’: user.cpp:48:29: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(A, sizeof(A), fin); ^ user.cpp:49:29: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(B, sizeof(B), fin); ^