how the iterator in c could be printed

0 votes

Suppose, I have declared a vector in C++ like this:

vector<int>numbers = {4,5,3,2,5,42};

I can iterate it through the following code:

for (vector<int>::iterator it = numbers.begin(); it!=numbers.end(); it++){
    // code goes here
}

I'd now want to discuss programming in the for loop block.

I can use this iterator to access and modify any value. 

Let's imagine that I want to tenfold the print and every value. 

The code would then be:

*it+=10;
cout << *it << endl;

I have the ability to output the addresses of both the iterator and the elements being iterated.

You may output the iterator's address by using:

cout << &it << endl;

Address of iterated elements can be printed by:

cout << &(*it) << endl;

But why the iterator itself could not printed by doing the following?

cout << it <<endl;

I initially believed the convention was a JAVA invention due to its security-related nature. 

If it is, though, how come I was able to print its address?

But is there another way to accomplish this? 

Why not, then?

Jul 11 in C++ by Nicholas
• 4,720 points
8 views

No answer to this question. Be the first to respond.

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.

Related Questions In C++

0 votes
1 answer

how could I use the power function in c/c++ without pow(), functions, or recursion

It is part of a series.  Replace pow() with the previous iteration's value. There is no need for code to call pow ().  Pow(x, 5 * I - 1) and pow(-1, I - 1) may be formed since both have an int exponent dependent on the iterator I from the previous loop iteration. Example: Let f(x, i) = pow(x, 5 * i ...READ MORE

answered Jun 21 in C++ by Damon
• 4,760 points
43 views
0 votes
1 answer

How to use std::sort to sort an array in C++

We receive std::begin and std::end in C++0x/11, which are overloaded for arrays: #include <algorithm> int main(){ int v[2000]; ...READ MORE

answered Jun 1 in C++ by Damon
• 4,760 points
36 views
0 votes
0 answers

How to traverse stack in C++?

Is traversing std::stack possible in C++? It is not possible to traverse using the following method.  Because there is no member end in std::stack. std::stack<int> foo; // .. for (__typeof(foo.begin()) it = foo.begin(); ...READ MORE

Jun 1 in C++ by Nicholas
• 4,720 points
61 views
0 votes
1 answer

The new syntax "= default" in C++11

A defaulted default function Object() { [native code] } is defined as a user-defined default function Object() { [native code] } with an empty compound statement and no initialization list. I'll give you an example to demonstrate the difference: #include <iostream> using namespace std; class A { public: ...READ MORE

answered Jun 7 in C++ by Damon
• 4,760 points
18 views
0 votes
1 answer

Are virtual functions the only way to achieve Runtime Polymorphism in C++?

fprintf is a polymorphism function in the C programming language. It can print to a file, stdout, a printer, a socket, or whatever else the system can represent as a stream if you supply it different handles. FILE* file = fopen("output.txt", "w"); ...READ MORE

answered Jun 21 in C++ by Damon
• 4,760 points
27 views
0 votes
1 answer

What is the best way to use a HashMap in C++?

The ordered and unordered map containers (std::map and std::unordered map) are included in the standard library.  The items in an ordered map are sorted by key, and insert and access are in O (log n).  For ordered maps, the standard library often use red black trees.  However, this is only an implementation detail.  Insert and access are in O in an unordered map (1).  It is simply another term for a hashtable. An illustration using (ordered) std::map: #include <map> #include <iostream> #include <cassert> int main(int argc, char ...READ MORE

answered Jun 10 in C++ by Damon
• 4,760 points
40 views
0 votes
0 answers

Sorting a vector in descending order

Should I  utilize  std::sort(numbers.begin(), numbers.end(), std::greater<int>()); or std::sort(numbers.rbegin(), numbers.rend()); // ...READ MORE

Jul 5 in C++ by Nicholas
• 4,720 points
43 views
0 votes
1 answer

what are the ways in which a list can be iterated

  There are 5 ways to iterate over ...READ MORE

answered Apr 23, 2018 in Java by sharth
• 3,350 points
411 views
0 votes
1 answer

setuptools: build shared libary from C++ code, then build Cython wrapper linked to shared libary

There is a seemingly undocumented feature of setup that ...READ MORE

answered Sep 11, 2018 in Python by Priyaj
• 58,080 points
204 views
0 votes
1 answer

setuptools: build shared libary from C++ code, then build Cython wrapper linked to shared libary

There is a seemingly undocumented feature of setup that ...READ MORE

answered Sep 21, 2018 in Python by Priyaj
• 58,080 points
1,409 views
webinar REGISTER FOR FREE WEBINAR X
Send OTP
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP