When used as parameters, variables allow a function to access the parameter’s
original argument.

 reference

Explanation:

In an function if the variables are passed as reference variables this means that the variables are pointing to the original arguments.So the changes made in the function on the reference variables will be reflected back on the original arguments.

For example:-

#include<iostream>

using namespace std;

void swap(&int f,&int s)

{

    int t=f;

    f=s;

   s =temp;

}

int main()

{

int n,m;

n=45;

m=85;

swap(n,m);

cout<<n<<" "<<m;

return 0;

}

the values of m and n will get swapped.

#include<iostream>

using namespace std;

void swapv(int f,int s)

{

    int t=f;

    f=s;

    s=temp;

}

int main()

{

int n,m;

n=45;

m=85;

swapv(n,m);

cout<<n<<" "<<m;

return 0;

}

In this program the values of m and n will not get swapped because they are passed by value.So duplicate copies of m and n will be created and manipulation will be done on them.

the printer can be used in a both wired and wireless network, only one of the connection methods can be used at one time when the wireless setting is enabled, the wired (ethernet) setting is disabled.

but first you need to

`connect the cord to your computer

`open settings app from the start menu

`click devices

`than click add printer or scanner

and than you should be able to do it from there, if not let me know i can you! : )