#include <iostream> 
 
using namespace std; 
 
int preinc(int &x) { 
    return ++x; 
} 
 
int postinc(int &x) { 
    return x++; 
} 
 
int main(void) { 
    int x = 5; 
 
    cout << preinc(x); 
    cout << postinc(x); 
    cout << x; 
 
    return 0; 
}