Returning multiple values from function

[Shruthi LS]

Hi all,

1. How to return multiple values from the function(for example how to return the four multiple float values from the function)? I tried in internet, but not satisfied with the answer. Could anyone send the document/link for the same.

2. What is the format for the doc string in cpp?

Suggestions are appreciated.


Thank you,
Shruthi LS

[lastchance]

1. You can use multiple arguments passed by reference. Or you could package them in a single object like a tuple or a struct. I believe you can now use "structured bindings" (which seem to do roughly the same thing as returning a tuple). If they are all of the same type you could just put your multiple values in an array or vector.

2. c++ doesn't have doc strings like python's. Though a few comments at the start of your functions never did any harm ...

There do seem to be a few dangers inherent in the practice of learning python first and then assuming that its grammar will carry over to other languages.

[Shruthi LS]

Thank you so much for your response. @lastchance

It always helped me. Thank you so much for sharing your knowledge. @lastchance

Indeed! Learning python first, and assume everything is same in other languages too, which is very bad way of thinking.

[againtry]

A structured binding example expanded from https://www.learncpp.com/cpp-tutorial/74a-returning-values-by-value-reference-and-address/comment-page-3/

#include <tuple>
#include <iostream>
 
std::tuple<int, double, std::string> returnTuple()
{
    return { 5, 6.7 , "Hello Sailor"};
}
 
int main()
{
    auto [a, b, c]{ returnTuple() };
    std::cout << a << ' ' << b << ' ' << c << '\n';
 
    return 0;
}

5 6.7 Hello Sailor
Program ended with exit code: 0

[Shruthi LS]

Thank you @againtry