--- Tomoyo Daidouji <[EMAIL PROTECTED]> wrote:
> Hi all,
>
> I need to write a recursive function to calculate
> a^n. When the
> function call ends, it needs to return the number of
> multiplications
> it did. I've written the code, which calculates a^n,
> but I can't get
> the count to work properly. Could you tell me where
> I'm going wrong.
> I'm getting the following error:
>
> power_alg.cpp:33: error: reference to âcountâ is
> ambiguous
> power_alg.cpp:5: error: candidates are: int count
>
> Below is the complete code I'm using.
>
>
> #include <iostream>
> using namespace std;
>
> int count = 0;
> float Power(float a, int n)
> {
> float result;
>
> if (n == 0)
> {
> result = 1;
> count = 0;
> }
> else if (n == 1)
> {
> result = a;
> count = 0;
> }
> else if (n % 2 == 0)
> {
> result = Power(a*a, n/2);
> count++; //count as one multiplication
> }
> else if (n % 2 == 1)
> {
> result = Power(a*a, (n-1)/2) * a;
> count += 2; //count as two multiplications
> }
>
> return result;
>
> } //end Power function
>
> int main()
> {
> float a;
> int n;
>
> cout << "Please enter a number: ";
> cin >> a;
>
> cout <<"Please enter the power you're raising the
> number to: ";
> cin >> n;
>
> float answer = Power(a, n);
>
> cout << "The result is: " << answer << endl;
> cout << "The number of multiplications it takes
> is: " << count <<
> endl;
>
> } //end main function
>
> I would appreciate it very much if someone could
> help me out here.
>
> Thanks,
> Chai.
>
>
Chai,
I complied your code and didn't have any problems.
What compiler are you using? Did you copy your code
into the e-mail or did you retype it?
Ray
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