Return 3 elements from function C++

Question

I want to solve a problem, which needs the largest sum of the subarray and it's position. The program's solution is in pseudocode from the book Introductions to algorithms, however it contains a returning which contains 3 elements (low,high,sum). What can I do about this? How can I return three elements? The program is easily understandable, however the returning makes me unable to transform it to c++.

You can either create a struct/class, use a vector/array or pass variables by reference. — Devolus, Mar 09 '21 at 14:59

score 3 · Accepted Answer · answered Mar 09 '21 at 15:00

You could write a struct containing 3 ints and return that from the function:

struct data
{
 int low, mid, high;
};

data fun( /* args ... */ )
{
  // ...
  return {low, mid, high};  
}

Alternatively, if you don't want to name the structure explicitly, you could just return a std::tuple containing 3 ints.

std::tuple<int, int, int> fun( /* args ... */ )
{
  // ...
  return {low, mid, high};  
}

In either case, at the call site you can write:

auto [low, mid, high] = fun();

Return 3 elements from function C++

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