multiset::empty (STL/CLR)

測試是否沒有項目呈現。

    bool empty();

備註

成員函式會傳回空白的受控制序列的則為 true。它相當於multiset::size (STL/CLR)() == 0。您可以用它來測試是否是空的多重集。

範例

// cliext_multiset_empty.cpp 
// compile with: /clr 
#include <cliext/set> 
 
typedef cliext::multiset<wchar_t> Mymultiset; 
int main() 
    { 
    Mymultiset c1; 
    c1.insert(L'a'); 
    c1.insert(L'b'); 
    c1.insert(L'c'); 
 
// display initial contents " a b c" 
    for each (wchar_t elem in c1) 
        System::Console::Write(" {0}", elem); 
    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

標頭: < cliext/設定 >

Namespace: cliext

請參閱

參考

multiset (STL/CLR)

multiset::size (STL/CLR)