Eroare de compilare: In file included from /usr/include/c++/3.3/backward/fstream.h:31, from user.cpp:1: /usr/include/c++/3.3/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 <sstream> instead of the deprecated header <strstream.h>. To disable this warning use -Wno-deprecated. user.cpp:4: error: `main' must return `int' user.cpp:4: error: return type for `main' changed to `int' user.cpp: In function `int main(...)': user.cpp:8: error: parse error before `.' token user.cpp:11: warning: converting to `int' from `double' user.cpp:13: error: `i' undeclared (first use this function) user.cpp:13: error: (Each undeclared identifier is reported only once for each function it appears in.) user.cpp:18: error: `v' undeclared (first use this function) user.cpp:21: error: `a' undeclared (first use this function) user.cpp:33:1: warning: no newline at end of file