#include <stdio.h> 
 
void ampersand( int n, int &k ); 
 
int main() 
{     
    int n = 5; 
    int k = 10; 
     
    ampersand( n, k ); 
    printf( "n=%d &k=%d\n", n, k ); 
 
    return 0; 
} 
 
void ampersand( int n, int &k ) 
{ 
    k -= 5; 
    --n; 
}