vector-insert

////////////////////////////////////////
//      2018/04/16 19:48:47
//      vector-insert
#include <iostream>
#include <vector>
#include <iterator>
#include <algorithm>
#include <numeric>

using namespace std;

template<class T>
class Print{
public:
    void operator()(T& t){
        cout << t << " ";
    }
};

// ===========================

int main(){
    int ary[5];
    fill(ary, ary + 5, 1);

    vector<int> v(5);
    vector<int>::iterator it;
    Print<int> print;
    //copy(ary, ary + 5, back_inserter(v));
    iota(v.begin(),v.end(),1);


    cout << "Vector v :" << endl;
    for_each(v.begin(),v.end(), print);
    cout << endl;

    it = v.begin();
    // insert value "5" at the position "it"
    cout << "v.insert(it,10)" << endl;
    v.insert(it, 10);
    for_each(v.begin(), v.end(), print);
    cout << endl;

    // insert range ary+2 - ary+5 at the position "it"
    it = v.begin()+5;
    cout << "v.insert(it,ary+2,ary+5)" << endl;
    v.insert(it, ary + 2, ary + 5);
    for_each(v.begin(), v.end(), print);
    cout << endl;

    // insert 2 value of "20" at the position "it"
    it = v.end() - 2;
    cout << "v.insert(it,2,20)";
    v.insert(it, 2, 20);
    for_each(v.begin(),v.end(),print);
    cout << endl;
    return 0;
}

/*
OUTPUT:
    Vector v :
    1 2 3 4 5
    v.insert(it,10)
    10 1 2 3 4 5
    v.insert(it,ary+2,ary+5)
    10 1 2 3 4 1 1 1 5
    v.insert(it,2,20)10 1 2 3 4 1 1 20 20 1 5
*/