复刻c++常用函数（1）

iostream

cin

  __istream_type&
      operator>>(bool& __n)
      { return _M_extract(__n); }

      __istream_type&
      operator>>(short& __n);

      __istream_type&
      operator>>(unsigned short& __n)
      { return _M_extract(__n); }

      __istream_type&
      operator>>(int& __n);

      __istream_type&
      operator>>(unsigned int& __n)
      { return _M_extract(__n); }

      __istream_type&
      operator>>(long& __n)
      { return _M_extract(__n); }

      __istream_type&
      operator>>(unsigned long& __n)
      { return _M_extract(__n); }

#ifdef _GLIBCXX_USE_LONG_LONG
      __istream_type&
      operator>>(long long& __n)
      { return _M_extract(__n); }

      __istream_type&
      operator>>(unsigned long long& __n)
      { return _M_extract(__n); }
#endif
      __istream_type&
      operator>>(float& __f)
      { return _M_extract(__f); }

      __istream_type&
      operator>>(double& __f)
      { return _M_extract(__f); }

      __istream_type&
      operator>>(long double& __f)
      { return _M_extract(__f); }
      __istream_type&
      operator>>(void*& __p)
      { return _M_extract(__p); }
      __istream_type&
      operator>>(__streambuf_type* __sb);

cout

__ostream_type&
operator<<(long __n)
{ return _M_insert(__n); }
__ostream_type&
operator<<(unsigned long __n)
{ return _M_insert(__n); }
__ostream_type&
operator<<(bool __n)
{ return _M_insert(__n); }
__ostream_type&
operator<<(short __n);
__ostream_type&
operator<<(unsigned short __n)
{
return _M_insert(static_cast<unsigned long>(__n));
}
__ostream_type&
operator<<(int __n);
__ostream_type&
operator<<(unsigned int __n)
{
return _M_insert(static_cast<unsigned long>(__n));
}
#ifdef _GLIBCXX_USE_LONG_LONG
      __ostream_type&
      operator<<(long long __n)
      { return _M_insert(__n); }

      __ostream_type&
      operator<<(unsigned long long __n)
      { return _M_insert(__n); }
#endif
__ostream_type&
operator<<(double __f)
{ return _M_insert(__f); }
__ostream_type&
operator<<(float __f)
{
return _M_insert(static_cast<double>(__f));
}
__ostream_type&
operator<<(long double __f)
{ return _M_insert(__f);}
__ostream_type&
operator<<(const void* __p)
{ return _M_insert(__p); }
__ostream_type&
operator<<(__streambuf_type* __sb);

getline

__istream_type&
getline(char_type* __s, streamsize __n)
{ return this->getline(__s, __n, this->widen('\n')); }