Finding the power

Question

Write a C function which accepts a positive integer, n, and returns 2^n. State any assumptions made.

So is this correct....??

#include<math.h>
double power(int x)
 {
     int i,pow,n, ans;
     ans=1;


     printf ("Enter the number and power:");
     scanf ("%d%d", &pow, &n);

     for(i=1;i<=pow; i++)
     {
       ans = ans *n                    
        return pow(2,n);
      }




    int main ()
    {
       int x, y,c;
       c=pow(x,y);

       printf("%d to the power %d is %d",n,pow,ans);
       getch();

}

already tried what? there is simply a function prototype but no actual code to perform the task... what have you tried so far? SO is not about us doing your homework... — NirMH, May 14 '14 at 06:22

JumpIfBelow · Answer 1 · 2014-05-14T06:50:05.120

0

If I understand, what you want is simply to do 2^n. p^n will never exists.

 #include <math.h>
    double two_pow_n(int n){
      return pow(2, n);
    }

edited May 14 '14 at 06:50

answered May 14 '14 at 06:26

JumpIfBelow

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I corrected my answer. I mean that he will never ask his function for somtheing like 3^5, the first parameter is fixed to 2. – JumpIfBelow May 14 '14 at 06:34
The first character of an identifier can't be a digit, you'll need to change that function name to something like two_pow or pow2. – Blastfurnace May 14 '14 at 06:47
You're right, a simple rule I forgot. Edited. – JumpIfBelow May 14 '14 at 06:50

Finding the power

1 Answers1