vector::data
Returns a pointer to the first element in the vector.
const_pointer data() const;
Return Value
A pointer to the first element in the vector Class or to the location succeeding an empty vector.
Example
// vector_data.cpp
// compile with: /EHsc
#include <vector>
#include <iostream>
using namespace std;
int main()
{
vector<int> vec;
vector<int>::pointer pvec;
vector<int>::const_pointer cpvec;
vec.push_back(1);
vec.push_back(2);
// Iterate using direct pointer access, not iterators
cout << "The vector contains:";
cpvec = vec.data();
for (size_t n = vec.size(); 0 < n; --n, ++cpvec)
{
cout << " " << *cpvec;
}
cout << endl;
// Iterate using pointer and modify elements
cout << "The vector now contains:";
pvec = vec.data();
*pvec = 20;
for (size_t n = vec.size(); 0 < n; --n, ++pvec)
{
cout << " " << *pvec;
}
cout << endl;}
The vector contains elements: 1 2 The vector now contains elements: 20 2
Requirements
Header: <vector>
Namespace: std