vector::data

返回指向该矢量的第一个元素。

const_pointer data() const;
pointer begin();

返回值

指向在 vector Class 的第一个元素或给成功空 vector的位置。

示例

// vector_data.cpp
// compile with: /EHsc
#include <vector>
#include <iostream>

int main()
{
    using namespace std;
    vector<int> c1;
    vector<int>::pointer c1_Ptr;
    vector<int>::const_pointer c1_cPtr;

    c1.push_back(1);
    c1.push_back(2);

    cout << "The vector c1 contains elements:";
    c1_cPtr = c1.data();
    for (size_t n = c1.size(); 0 < n; --n, c1_cPtr++)
    {
        cout << " " << *c1_cPtr;
    }
    cout << endl;

    cout << "The vector c1 now contains elements:";
    c1_Ptr = c1.data();
    *c1_Ptr = 20;
    for (size_t n = c1.size(); 0 < n; --n, c1_Ptr++)
    {
        cout << " " << *c1_Ptr;
    }
    cout << endl;
}

要求

标头: <vector>

命名空间: std

请参见

参考

vector Class

标准模板库