Return multiple values in C++ like in C#

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if I want to return multiple values in c# I will return for example

c#

(string name, string jobTitle) GetEmployee()
{
...
}

in c++ since you can only see the header it looks something like this

///<returns> name, jobTitle
std :: tuple<string, string=""> GetEmployee();

Is there a way to return multiple values in c++ with names like in c#
so I don't have to put a <returns> tag on every method

What I have tried:

For now I return data in a std :: tuple

Posted 13-Dec-20 9:34am

Member 15019969

Updated 13-Dec-20 14:09pm

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Shao Voon Wong · Answer 1 · 2020-12-13T14:09:00

You can keep your tuple as it is.

C++

std::tuple<string, string> GetEmployee();

C++17 has structured binding which allows for returning multiple values from std::pair or std::tuple.

How to return multiple values from a function in C++17[^]

You can define the returned variables in this way when calling GetEmployee()

C++

auto [name, jobTitle] = GetEmployee();

To use structured binding in Visual C++ 2019, you have to set the language to C++17 by right-click on the project in the Solution Explorer to click on Properties on the popup menu and on the General tab, change the C++ Language Standard from Default(ISO C++14 Standard) to Default ISO C++ 17 Standard (/std:c++17). Click Ok to close the Properties dialog.

Rick York · Answer 2 · 2020-12-13T09:53:00

Solution 1

You can pass references to the items you want to set. Something like,

bool GetEmployee( std::string & name, std::string & title );

then you set those values in the function. You could return true if the values are found and set, false if not.

Posted 13-Dec-20 9:53am

Rick York

Richard MacCutchan · Answer 3 · 2020-12-13T09:53:00

Solution 2

What you refer to is just documentation which explains what the function returns. It has no meaning to the compiler. See std::tuple - cppreference.com[^] for examples.

Posted 13-Dec-20 9:53am

Richard MacCutchan

Updated 13-Dec-20 9:57am

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Return multiple values in C++ like in C#

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