ex0507.cpp

teach yourself C++ in 21 days 第五版

#include <iostream>
using namespace std;
typedef unsigned short USHORT;
typedef unsigned long ULONG;

ULONG GetPower(USHORT n, USHORT power);

int main()
{
   USHORT number, power;
   ULONG answer;
   cout << "Enter a number: ";
   cin >> number;
   cout << "To what power? ";
   cin >> power;
   answer = GetPower(number,power);
   cout << number << " to the " << power << "th power is " <<
     answer << endl;
   return 0;
}

ULONG GetPower(USHORT n, USHORT power)
{
    if(power == 1)
       return n;
    else
       return (n * GetPower(n,power-1));
}