vocale.cpp: In function `int main()': vocale.cpp:11: warning: passing NULL used for non-pointer argument 3 of `void std::fill(_ForwardIter, _ForwardIter, const _Tp&) [with _ForwardIter = char*, _Tp = int]' vocale.cpp:13: warning: passing NULL used for non-pointer argument 3 of `void std::fill(_ForwardIter, _ForwardIter, const _Tp&) [with _ForwardIter = char*, _Tp = int]' vocale.cpp:16: warning: comparison between signed and unsigned integer expressions vocale.cpp:16: warning: passing NULL used for non-pointer argument 3 of `void std::fill(_ForwardIter, _ForwardIter, const _Tp&) [with _ForwardIter = char*, _Tp = int]' vocale.cpp:20: warning: passing NULL used for non-pointer argument 3 of `void std::fill(_ForwardIter, _ForwardIter, const _Tp&) [with _ForwardIter = char*, _Tp = int]' vocale.cpp:22: warning: passing NULL used for non-pointer argument 3 of `void std::fill(_ForwardIter, _ForwardIter, const _Tp&) [with _ForwardIter = char*, _Tp = int]' vocale.cpp:27: warning: passing NULL used for non-pointer argument 3 of `void std::fill(_ForwardIter, _ForwardIter, const _Tp&) [with _ForwardIter = char*, _Tp = int]' vocale.cpp:32: warning: comparison between signed and unsigned integer expressions vocale.cpp:33: warning: passing NULL used for non-pointer argument 3 of `void std::fill(_ForwardIter, _ForwardIter, const _Tp&) [with _ForwardIter = char*, _Tp = int]' vocale.cpp:36: warning: comparison between signed and unsigned integer expressions vocale.cpp:40: warning: passing NULL used for non-pointer argument 3 of `void std::fill(_ForwardIter, _ForwardIter, const _Tp&) [with _ForwardIter = char*, _Tp = int]' vocale.cpp:44: warning: passing NULL used for non-pointer argument 3 of `void std::fill(_ForwardIter, _ForwardIter, const _Tp&) [with _ForwardIter = char*, _Tp = int]'