宽字符相关 （wchar_t）

#include <iostream>
int main(void)
{
 using std::cout;
 cout<<"hello!"<<std::endl;
 wchar_t a=L'd';
 cout<<sizeof(a)<<std::endl;
 std::wcout<<a<<std::endl;
 wchar_t b;
 std::wcin>>b;
 std::wcout<<b<<std::endl;
 std::wcout<<L"hello"<<std::endl; 
 return 0;
}