/*
 *
 */
#include <stdio.h>

double power (double x,int n){
    if(n==0){
        return 1.0;
    } else {
        return x * power( x , n - 1 );
    }
}

int main(void){
    int myint = sizeof(int);
    float bits = power( 2, myint);
    printf ("in is %d bytes, or %f bits\n", myint,bits);
}