Change contents of vector through an iterator : vector iterator « vector « C++ Tutorial

1. C++ Tutorial
2. vector
3. vector iterator

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

int main()
{
  vector<char> v(10); // create a vector of length 10
  vector<char>::iterator p; // create an iterator
  int i;

  // assign elements in vector a value
  p = v.begin();
  i = 0;
  while(p != v.end()) {
    *p = i + 'a';
    p++;
    i++;
  }

  // display contents of vector
  cout << "Original contents:\n";
  p = v.begin();
  while(p != v.end()) {
    cout << *p << " ";
    p++;
  }
  cout << "\n\n";



  // change contents of vector
  p = v.begin();
  while(p != v.end()) {
    *p = toupper(*p);
    p++;
  }


  // display contents of vector
  cout << "Original contents:\n";
  p = v.begin();
  while(p != v.end()) {
    cout << *p << " ";
    p++;
  }
  cout << "\n\n";

  return 0;
}

Original contents:
a b c d e f g h i j

Original contents:
A B C D E F G H I J