queue::front (STL/CLR)

访问第一个元素。

    reference front();

备注

成员函数返回对控件序列的第一个元素，必须为非 null。您使用它访问第一个元素，那么，当您知道存在)。

示例

// cliext_queue_front.cpp 
// compile with: /clr 
#include <cliext/queue> 
 
typedef cliext::queue<wchar_t> Myqueue; 
int main() 
    { 
    Myqueue c1; 
    c1.push(L'a'); 
    c1.push(L'b'); 
    c1.push(L'c'); 
 
// display initial contents " a b c" 
    for each (wchar_t elem in c1.get_container()) 
        System::Console::Write(" {0}", elem); 
    System::Console::WriteLine(); 
 
// inspect first item 
    System::Console::WriteLine("front() = {0}", c1.front()); 
 
// alter first item and reinspect 
    c1.front() = L'x'; 
    for each (wchar_t elem in c1.get_container()) 
        System::Console::Write(" {0}", elem); 
    System::Console::WriteLine(); 
    return (0); 
    } 
 

要求

标题: <cliext/队列>

命名空间: cliext

请参见

参考

queue (STL/CLR)

queue::back (STL/CLR)

queue::back_item (STL/CLR)

queue::front_item (STL/CLR)