/*
NIIT 《C++ & CGI PROGRAMMING &SCRRIPTING》 Skill Base
P5.7		◆5.P.2◆
Checkup：	MrZhou
18:06 2004-09-26
*/

#include <iostream.h>
void square(int &num);

int main()
{
  int number=10;
  square(number);
  cout << number << endl;
  return 0;
}

void square(int &num)
{
  num*=num;
  cout << num << endl;
}