Eroare de compilare: user.cpp: In function ‘void citire()’: user.cpp:12:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<=s.size();i++) ^ user.cpp: In function ‘int Numara()’: user.cpp:17:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<=s.size();i++) ^ user.cpp:20:23: error: no matching function for call to ‘isalpha(char&, int&)’ if(isalpha(x,i)==0) ^ user.cpp:20:23: note: candidates are: In file included from /usr/include/c++/4.8/cctype:42:0, from /usr/include/c++/4.8/bits/localefwd.h:42, from /usr/include/c++/4.8/ios:41, from /usr/include/c++/4.8/ostream:38, from /usr/include/c++/4.8/iostream:39, from user.cpp:1: /usr/include/ctype.h:113:1: note: int isalpha(int) __exctype (isalpha); ^ /usr/include/ctype.h:113:1: note: candidate expects 1 argument, 2 provided In file included from /usr/include/c++/4.8/bits/basic_ios.h:37:0, from /usr/include/c++/4.8/ios:44, from /usr/include/c++/4.8/ostream:38, from /usr/include/c++/4.8/iostream:39, from user.cpp:1: /usr/include/c++/4.8/bits/locale_facets.h:2560:5: note: template<class _CharT> bool std::isalpha(_CharT, const std::locale&) isalpha(_CharT __c, const locale& __loc) ^ /usr/include/c++/4.8/bits/locale_facets.h:2560:5: note: template argument deduction/substitution failed: user.cpp:20:23: note: cannot convert ‘i’ (type ‘int’) to type ‘const std::locale&’ if(isalpha(x,i)==0) ^ user.cpp:21:13: error: ‘nr’ was not declared in this scope nr++; ^ user.cpp:23:12: error: ‘nr’ was not declared in this scope return nr; ^ user.cpp:24:1: warning: control reaches end of non-void function [-Wreturn-type] } ^