Passes the variable to be doubled by reference


#include <iostream>
using namespace std;

void doubleIt(int&);  

int main ()
{
   int num;

   cout << "Enter number: ";

   cin >> num;

   doubleIt(num);

   cout << "The number doubled in main is " << num << endl;

   return 0;
}


void doubleIt (int& x)
{
   cout << "The number to be doubled is " << x << endl;

   x *= 2;

   cout << "The number doubled in doubleIt is " << x << endl;
}

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4.	Function uses two arguments
5.	Passing Arguments by Reference
6.	Passed by value and passed by reference
7.	Pass string (char *) into a function
8.	Demonstrates the use of return values with reference type.
9.	Expressions with reference type exemplified by string assignments.

Passes the variable to be doubled by reference : Function Parameters « Function « C++

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