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removing element from vector while iterating c++

Anxious Alligator on Sep 13, 2020

#include <iostream>
#include <vector>
#include <algorithm>
 
int main()
{
    std::vector<int> v = { 1, 2, 3, 4, 5, 6 };
 
    auto it = v.begin();
    while (it != v.end())
    {
        // specify condition for removing element; in this case remove odd numbers
        if (*it & 1) {
            // erase() invalidates the iterator, use returned iterator
            it = v.erase(it);
        }
        // Notice that iterator is incremented only on the else part (why?)
        else {
            ++it;
        }
    }
 
    for (int const &i: v) {
        std::cout << i << ' ';
    }
 
    return 0;
}

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"removing element from vector while iterating c++" Code Answer's