Creating String From A Loop

[gundalav]

Dear all,

I tried to create a string with this code

#include <iostream>
#include <fstream>
#include <string>
#include <stdio>
#include <stdlib>
#include <vector>
using namespace std;

int main () {
	
	  vector <vector<string> > numTag;
	
	for (int tagno=0; tagno <=10; tagno++) {

	    //here we want to create a string out of 
	    // this loop
	    for (int j=0; j <=5; j++) {
	         numTag.push_back(j);
	     }

	   cout << "Tag No: " << tagno << ",is " << numTag << endl;
	}
}

The expected results is this:

Tag No: 1, is 012345
Tag No: 2, is 012345
...
Tag No: 10, is 012345

But not sure why the code fails?

[Duthomhas]

You are trying to push_back() an integer where a vector of strings is expected.

Perhaps you are thinking something like (highly simplified for clarity):

#include <algorithm>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <sstream>
#include <string>
#include <vector>
using namespace std;

int main()
  {
  vector <string> tag_list;

  // Create the list of tags
  for (int tag_idx = 0; tag_idx < 20; tag_idx++)
    {
    ostringstream oss;
    oss << "tag_" << setfill( '0' ) << setw( 2 ) << tag_idx;
    tag_list.push_back( oss.str() );
    }

  // Show them to the user
  copy(
    tag_list.begin(),
    tag_list.end(),
    ostream_iterator <string> ( cout, "\n" )
    );

  return 0;
  }

Hope this helps.