Demonstrate constructors, swap(), empty(), back(), pop_back() on vector - C++ STL

C++ examples for STL:vector

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Description

Demonstrate constructors, swap(), empty(), back(), pop_back() on vector

Demo Code

#include <iostream>
#include <vector>
using namespace std;
int main()/*from w  ww  .  ja  v a2s.co  m*/
{                              // an array of doubles
    double arr[] = { 1.1, 2.2, 3.3, 4.4 };
    vector<double> v1(arr, arr+4); // initialize vector to array
    vector<double> v2(4);          // empty vector of size 4
    v1.swap(v2);                   // swap contents of v1 and v2
    while( !v2.empty() )           // until vector is empty,
    {
       cout << v2.back() << ' ';   // display the last element
       v2.pop_back();              // remove the last element
    }                           // output: 4.4 3.3 2.2 1.1
    cout << endl;
    return 0;
}

Result


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