通过

vector::size (STL/CLR)

  • 项目

计算元素的数量。

    size_type size();

备注

成员函数返回控制序列的长度。 使用其当前确定元素的数目。控制序列。 如果您关注的是序列是否具有非零大小，请参见 vector::empty (STL/CLR)()。

示例

// cliext_vector_size.cpp 
// compile with: /clr 
#include <cliext/vector> 
 
int main() 
    { 
    cliext::vector<wchar_t> c1; 
    c1.push_back(L'a'); 
    c1.push_back(L'b'); 
    c1.push_back(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} starting with 3", c1.size()); 
 
// clear the container and reinspect 
    c1.clear(); 
    System::Console::WriteLine("size() = {0} after clearing", c1.size()); 
 
// add elements and clear again 
    c1.push_back(L'a'); 
    c1.push_back(L'b'); 
    System::Console::WriteLine("size() = {0} after adding 2", c1.size()); 
    return (0); 
    }

要求

标头: <cliext/vector>

命名空间: cliext

请参见

参考

vector (STL/CLR)

vector::empty (STL/CLR)