Thread: Return 2 variables?

Is it possible to return 2 variables for ex.

Code:

int hello(int x, int y)
{
   x++;
   y++;
   return x,y;
}

Example:

Code:

void hello(int &x, int &y) {
  x++;
  y++;
}

No. But you can wrap them up in a struct and then return the struct.

Code:

struct Return2Ints {
  int x;
  int y;
};

Return2Ints hello (int x, int y)
{
  return Return2Ints(x+1,y+1);
}

how would i recieve it?

Code:

x = return2numbers();

xbeing a struct?

From Thantos' example:

Code:

Return2Ints someStruct = hello (1,2);

Adding to bithub:
To get to the actual values

Code:

int a = someStruct.x;
int b = someStruct.y;

A generic way to do this is to return an std::pair:

std::pair<int,int> hello(int x, int y); { return std::make_pair (x,y); }

std::pair bla = hello(1,2);
cout << bla.first; //x

Tuples (look up Boost.Tuple) let you return any number of values. You can use Boost.Tuple in a similar way to std::pair.

>> return Return2Ints(x+1,y+1);
Return2Ints needs a proper constructor for that to work.

Code:

struct Return2Ints {
  int x;
  int y;

  Return2Ints(int x_, int y_) : x(x_), y(y_) {}
};

gg

Opps forgot about that. Though it can be done without a constructor:

Code:

Return2Ints hello(int x, int y)
{
  Return2Ints ret = {x+1,y+1};
  return ret;
}