?
Solved

Printing the elements of a set declared inside a map in C++.

Posted on 2016-10-02
3
Medium Priority
?
82 Views
Last Modified: 2016-10-02
Hi all, I am trying to print the elements of the set declared inside a map in c++. However, the code isn't printing the elements. I have this code :
#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <map>
#include <utility>
#include <stdio.h>
#include <ctype.h>
#include <typeinfo>
#include <string.h>
#include <vector>
#include <algorithm>
#include <set>



using namespace std;

int main()
{
	std::set<string> st;
	std::map<string,std::set<string> > mp;
	std::map<string,std::set<string> >::iterator row;
	std::set<string>::const_iterator col;

	mp["A"].insert("pawan");
	mp["A"].insert("patil");

	
	for (row = mp.begin(); row!=mp.end(); row++) 
	{
		cout<<row->first;
    	for (col = row->second.begin(); col!=row->second.end(); ++col);
    	{
    		cout<<*col<<" ";
    	}
    	cout<<mp["A"].size()<<"\n";
	}
	//cout<<row->second;
	
	return 0;
}

Open in new window

0
Comment
Question by:Pawan Patil
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 32

Accepted Solution

by:
phoffric earned 2000 total points
ID: 41825630
I would remove the ; on line 32 of the for-loop. The ; at the end of the for-loop will result in getting to the end of the set and when you try to dereference col, you  no longer a valid iterator.

(I admit that seeing those little ; on a smudged tablet is a little hard to see.)
1
 
LVL 32

Assisted Solution

by:phoffric
phoffric earned 2000 total points
ID: 41825633
Looking a little more, I am surprised that you don't get compiler errors.
In any case, remove the included superfluous .h header files; and especially replace:
#include <string.h>
with
#include <string>
1

Featured Post

On Demand Webinar: Networking for the Cloud Era

Did you know SD-WANs can improve network connectivity? Check out this webinar to learn how an SD-WAN simplified, one-click tool can help you migrate and manage data in the cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Templates For Beginners Or How To Encourage The Compiler To Work For You Introduction This tutorial is targeted at the reader who is, perhaps, familiar with the basics of C++ but would prefer a little slower introduction to the more ad…
What is C++ STL?: STL stands for Standard Template Library and is a part of standard C++ libraries. It contains many useful data structures (containers) and algorithms, which can spare you a lot of the time. Today we will look at the STL Vector. …
The viewer will learn how to pass data into a function in C++. This is one step further in using functions. Instead of only printing text onto the console, the function will be able to perform calculations with argumentents given by the user.
The viewer will learn how to user default arguments when defining functions. This method of defining functions will be contrasted with the non-default-argument of defining functions.
Suggested Courses
Course of the Month14 days, 22 hours left to enroll

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question