Sams Teach Yourself C++ in 21 Days

12: cout << “Enter two numbers.\n Number one: “;

13: cin >> one;

14: cout << “Number two: “;

15: cin >> two;

16: answer = Divider(one, two);

17: if (answer > -1)

18: cout << “Answer: “ << answer;

19: else

20: cout << “Error, can’t divide by zero!”;

21: return 0;

22: }

23:

24: short int Divider(unsigned short int valOne, unsigned short int

➥valTwo)

25: {

26: if (valTwo == 0)

27: return -1;

28: else

29: return valOne / valTwo;

30: }

7. The following is one possible solution:
   1: #include
   2: using namespace std;
   3: typedef unsigned short USHORT;
   4: typedef unsigned long ULONG;
   5:
   6: ULONG GetPower(USHORT n, USHORT power);
   7:
   8: int main()
   9: {
   10: USHORT number, power;
   11: ULONG answer;
   12: cout << “Enter a number: “;
   13: cin >> number;
   14: cout << “To what power? “;
   15: cin >> power;
   16: answer = GetPower(number,power);
   17: cout << number << “ to the “ << power << “th power is “ <<
   18: answer << endl;
   19: return 0;
   20: }
   21:
   22: ULONG GetPower(USHORT n, USHORT power)
   23: {
   24: if(power == 1)
   25: return n;
   26: else
   27: return (n * GetPower(n,power-1));
   28: }

828 Appendix D

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