📜  在C++ STL中列出get_allocator

📅  最后修改于: 2021-05-30 19:36:08             🧑  作者: Mango

list :: get_allocator()是C++ STL中的内置函数,用于获取容器列表的分配器。
句法:

Allocator_type get_allocator()

参数:此函数没有任何参数。
返回值:返回与列表关联的分配器。

下面的程序清楚地说明了list :: get_allocator()函数。
示例1:

// C++ program to understand
// about list getallocator method
#include 
  
using namespace std;
int main(void)
{
    // Creating a container of type list
    list mylist;
  
    // creating a pointer of type int
    int* array;
  
    // creating array using mylist get_allocator
    array = mylist.get_allocator().allocate(3);
  
    // inserting some data into the created array
    for (int i = 0; i < 3; i++)
        array[i] = i;
  
    // printing details of the created array
    for (int i = 0; i < 3; i++)
        cout << array[i] << " ";
}
输出:
0 1 2

示例2:

// C++ program to understand
// about list getallocator method
#include 
  
using namespace std;
int main(void)
{
    // Creating a container of type list
    list mylist;
  
    // creating a pointer of type int
    string* array;
  
    // creating array using mylist get_allocator
    array = mylist.get_allocator().allocate(3);
  
    // inserting some data into array
    array[0] = "Geeks";
    array[1] = "For";
    array[2] = "Geeks";
  
    // printing details of array
    for (int i = 0; i < 3; i++)
        cout << array[i] << " ";
}
输出:
Geeks For Geeks
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