Vector and Iterator in C

Vector and Iterator in C

PROGRAM:

#include <iostream>
#include <vector>

using namespace std;

int main(int argc, char *argv[])
{
 vector<int> myarr;

 cout << " Size : " << myarr.size() << endl;

 //put data at vector
 myarr.push_back(5);
 myarr.push_back(10);
 myarr.push_back(15);
 myarr.push_back(20);
 myarr.push_back(25);

 cout << " Size : " << myarr.size() << endl;
 for (int i = 0; i < myarr.size(); i++)
 cout << " Array values " << myarr[i] << endl;

 //delete first value
 myarr.erase(myarr.begin());

 cout << " Size : " << myarr.size() << endl;
 for (int i = 0; i < myarr.size(); i++)
 cout << " Array values " << myarr[i] << endl;

 //delete last value
 myarr.erase(myarr.end()-1);

 cout << " Size : " << myarr.size() << endl;
 for (int i = 0; i < myarr.size(); i++)
 cout << " Array values " << myarr[i] << endl;

 //insert at position
 myarr.insert(myarr.begin()+2, 100);

 cout << " Size : " << myarr.size() << endl;
 for (int i = 0; i < myarr.size(); i++)
 cout << " Array values " << myarr[i] << endl;

 //delete middle value
 myarr.erase(myarr.begin()+1);

 cout << " Size : " << myarr.size() << endl;
 for (int i = 0; i < myarr.size(); i++)
 cout << " Array values " << myarr[i] << endl;

 return 0;
}

OUTPUT:

Size : 0

Size : 5
        Array values 5
        Array values 10
        Array values 15
        Array values 20
        Array values 25

Size : 4
        Array values 10
        Array values 15
        Array values 20
        Array values 25

Size : 3
        Array values 10
        Array values 15
        Array values 20

Size : 4
        Array values 10
        Array values 15
        Array values 100
        Array values 20

Size : 3
        Array values 10
        Array values 100
        Array values 20

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