CODEWITHSUNDEEP
c++loops
theintellects
theintellects

Reputation: 1370

Accessing next element in range based for loop before the next loop

How do I access the next element in range based for loop before the next loop?

I know with an iterative approach you do something like arr[++i], but how do I achieve the same result in a range-based for loop?

for (auto& cmd : arr) {
   steps = nextElement; //How do I get this nextElement before the next loop?
}

I understand I probably shouldn't be using a range-based for loop, but that's the requirement provided for this project.

Upvotes: 11

Views: 10380

Answers (1)

Benjamin Lindley
Benjamin Lindley

Reputation: 103693

If the range has contiguous storage (e.g. std::vector, std::array, std::basic_string or a native array), then you can do this:

for (auto& cmd : arr) {
    steps = *(&cmd + 1);
}

Otherwise, you can't, without an external variable.

Upvotes: 10

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