Eroare de compilare: user.cpp: In function ‘void sum(std::string)’: user.cpp:12:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 32; i >= 32 - num.size() + 1; i--) ^ user.cpp: In function ‘int main()’: user.cpp:38:18: error: invalid conversion from ‘int’ to ‘const char*’ [-fpermissive] sum(base10to2(x)); ^ In file included from /usr/include/c++/4.8/string:52:0, from /usr/include/c++/4.8/bits/locale_classes.h:40, from /usr/include/c++/4.8/bits/ios_base.h:41, from /usr/include/c++/4.8/ios:42, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/c++/4.8/bits/basic_string.h:490:7: error: initializing argument 1 of ‘std::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _CharT*, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]’ [-fpermissive] basic_string(const _CharT* __s, const _Alloc& __a = _Alloc()); ^ user.cpp:45:6: error: redeclaration of ‘int x’ int x=0,p=1; ^ user.cpp:34:6: error: ‘int x’ previously declared here int x; ^