Returning two variables in a C++ function [duplicate]

Answer 1

You can pass references to two doubles into a function, setting their values inside the function

void setTwoDoubles(double& d1, double& d2)
{
    d1 = 1.0;
    d2 = 2.0;
}

double d1, d2;
setTwoDoubles(d1, d2);
std::cout << "d1=" << d1 << ", d2=" << d2 << std::endl

Answer 2

You can't do it directly (because a return value is singular).
But, you could put a few values in a structure, and return that (like a pair<>).

A common pattern is to return output variables by reference:

ReturnVal Myfunction(/*in*/ BlahType _someParameters, /*out*/ ReturnType& _firstReturn, /*out*/ OtherReturnType& _secondReturn)
{
   _firstReturn = //someStuff
   _secondReturn = //someOtherStuff


return SUCCESS;
}