map::empty (STL/CLR)
測試項目是否不存在。
bool empty();
備註
成員函式傳回 true 表示一個空的控制順序。 它與 map::size (STL/CLR)() == 0。 您會用它來測試對應是否是空的。
範例
// cliext_map_empty.cpp
// compile with: /clr
#include <cliext/map>
typedef cliext::map<wchar_t, int> Mymap;
int main()
{
Mymap c1;
c1.insert(Mymap::make_value(L'a', 1));
c1.insert(Mymap::make_value(L'b', 2));
c1.insert(Mymap::make_value(L'c', 3));
// display contents " [a 1] [b 2] [c 3]"
for each (Mymap::value_type elem in c1)
System::Console::Write(" [{0} {1}]", elem->first, elem->second);
System::Console::WriteLine();
System::Console::WriteLine("size() = {0}", c1.size());
System::Console::WriteLine("empty() = {0}", c1.empty());
// clear the container and reinspect
c1.clear();
System::Console::WriteLine("size() = {0}", c1.size());
System::Console::WriteLine("empty() = {0}", c1.empty());
return (0);
}
需求
標題: <cliext/對應>
命名空間: cliext