[Solved] Printing contents of a vector [duplicate]

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As you mentioned “I did not understand what the code is doing”, let me briefly describe how to iterate through a container:

The long way:

vector<int> result = { 1,2,3 };

for (vector<int>::iterator it = result.begin(); it != result.end() ; it++) {
    int i = *it;
    cout << i << " ";
}

Each container provides an iterator, which you can think of a pointer moving forward along the elements of the container. begin() returns a pointer to the first element, end() returns a pointer to 1 past the last element. Dereferencing the iterator gives the actual value.

For above long way, with range-based for loops, C++ provides a shorthand notation with about the same meaning (i.e. it makes use of the iterator-concept but is less “clumsy” in notation):

for (auto i : result) {
    cout << i << " ";
}

Try it out; hope it helps.

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solved Printing contents of a vector [duplicate]