iterator of vector c++ code example

Example 1: how to iterate trough a vector in c++

vector<int> myVector;

myVector.push_back(1);
myVector.push_back(2);
myVector.push_back(3);
myVector.push_back(4);

for(auto x: myVector){
	cout<< x << " ";

}

vector<pair<int,int>> myVectorOfPairs;

myVectorOfPairs.push_back({1,2});
myVectorOfPairs.push_back({3,4});
myVectorOfPairs.push_back({5,6});
myVectorOfPairs.push_back({7,8});

for(auto x: myVectorOfPairs){
	cout<< x.first << " " << x.second << endl;

}

Example 2: c++ vector iterator

#include <iostream>
#include <vector>
using namespace std;

vector<int> myvector;

for (vector<int>::iterator it = myvector.begin();
     it != myvector.end();
     ++it)
   cout << ' ' << *it;
cout << '\n';

Example 3: c++ vector iterator

// EXAMPLE
vector<string> vData;
vData.push_back("zeroth");
vData.push_back("first");
vData.push_back("second");
vData.push_back("third");

std::vector<string>::iterator itData;

for (itData = vData.begin(); itData != vData.end() ; itData++)
{
  auto ElementIndex = itData-vData.begin();
  auto ElementValue = vData[ElementIndex]; // vData[ElementIndex] = *itData
  cout << "[ElementIndex:" << ElementIndex << "][ElementValue:" << ElementValue << "]\n";
}

/* HEADER(S)
#include <vector>
#include <iostream>
using namespace std;
*/

Example 4: declaring iterator in cpp

vector<int>::iterator ptr;