Thread: removing elements from a vector

Hi,

What I'm trying to do is to remove elements from my vector. Generally the idea is to do something like this:

Code:

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>

using namespace std;


int main (){

  vector<string> vec;

  for (int i =0; i< 10; i++)
    vec.push_back("abcdefghijk"+to_string((long long)i));

  for(int k = 0 ; k< vec.size();k++){ //bla bla bla
    if(k==5 || k==7)
        vec.erase(vec.begin()+k);

  }
  for (int i =0; i< vec.size(); i++)
    cout << vec[i] << endl;

return 0;

}

but in this case each time i remove an elament i need to recompute the index of the next element. So let say I want to remove the 5th and 7th element. the above algorithm will remove 5th with no problem but the 7th is not 7th any more but 6th. is there a clean way to do this without me explicitly recomputing the index position in each cycle. also is there a faster way to do this ?