Question

hi .can anyone tell me how to call a function by the reference ? c++

Answer 1

void functionName(int & x)
{
//function body
}

Answer 2

when u call a variable by function this means that the changes u make to it .. change the value of the actual variable and these changes can be seen in any other part of the program ...this gives u the ability to "return" more than one variable in a function ...

int myfunc(int n, int &x)
{ x++;
return n++;
}

main(){
int n=0;
int x=0;

cout << myfunc(n,x); // value of both x and n is incremented by 1 and this prints the
// value of n which is 1
cout << x ; //will print 1

return 0;
}