/*
Write a program using recursive function 'power' to compute x^n
power(x,n) = 1 , if n = 0
power(x,n) = x , if n = 1
power(x,n) = x * power(x,n-1) , otherwise
*/

#include  <stdio.h>
#include  <conio.h>

float  power(float  x, int  n)
{
    if(n==0)
        return  1 ;
    else if(n==1)
        return  x ;
    else
        return  ( x * power(x, n-1) ) ;
}

void main()
{
    float  x ;
    int  n ;
    clrscr() ;
    printf("Enter x and n: ") ;
    scanf("%f %d", &x, &n) ;
    printf("x raise to n = %f", power(x,n) ) ;
    getch() ;
}

/*
Output:

Enter x and n: 2.5  3
x raise to n = 15.625000
*/