Compilare: In file included from /usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/backward/fstream.h:31, from user.cpp:1: /usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/backward/backward_warning.h:32:2: warning: #warning This file includes at least one deprecated or antiquated header. Please consider using one of the 32 headers found in section 17.4.1.2 of the C++ standard. Examples include substituting the <X> header for the <X.h> header for C++ includes, or <iostream> instead of the deprecated header <iostream.h>. To disable this warning use -Wno-deprecated. user.cpp: In function 'void compare()': user.cpp:15: warning: unused variable 'j' user.cpp: In function 'void back(int)': user.cpp:64: warning: unused variable 'x' user.cpp:64: warning: unused variable 'y' user.cpp: In function 'long long int sume(char, int)': user.cpp:87: warning: array subscript has type 'char' user.cpp:88: warning: array subscript has type 'char' user.cpp:90: warning: array subscript has type 'char' user.cpp:92: warning: array subscript has type 'char' user.cpp:99: warning: array subscript has type 'char' user.cpp:99: warning: array subscript has type 'char' user.cpp:99: warning: array subscript has type 'char' user.cpp:107: warning: array subscript has type 'char' user.cpp:107: warning: array subscript has type 'char' user.cpp:107: warning: array subscript has type 'char' user.cpp:110: warning: array subscript has type 'char'