raise a floating point number to a positive integer

/*P5.6 Program to raise a floating point number to a positive integer*/
#include<stdio.h>
float power(float a , int n);
float Ipower(float a , int n);
main( )
{
    float a, p;
    int n;
    printf("Enter a and n : ");
    scanf("%f %d", &a, &n);
    p = power(a, n);
    printf("%f raised to power %d is %f\n", a, n, p);
    p = Ipower(a, n);
    printf("%f raised to power %d is %f\n", a, n, p);
}/*End of main()*/

/*Recursive*/
float power(float a , int n)
{
    if(n == 0)
        return(1);
    else
        return(a * power(a,n-1));
}/*End of power()*/

/*Iterative*/
float Ipower(float a , int n)
{
    int i;
    float result=1;
    for(i=1; i<=n; i++)
        result = result * a;
    return result;
}/*End of Ipower()*/