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Why does this work fine for me:
for(int i = 0; i < vec.size(); i++)
{
os << vec[i] << " ";
}
while this doesn’t:
for(vector<int>::iterator it = vec.begin(); it < vec.end(); it++)
{
os << vec[*it] << " ";
}
You should be printing
*itinstead of using it as the index and you should probably change the condition toit != vec.end().