/* this is a program with a recursive function */

#include <stdio.h>

int three_powered( int power );

main()
{
    int a = 4;
    int b = 9;
    
    printf( "\n3 to the power of %d is %d", a,
    three_powered(a) );
    printf( "\n3 to the power of %d is %d\n", b,
    three_powered(b) );
    
    return 0;
}

int three_powered( int power )
{
    
    if ( power < 1 )
        return( 1 );
    else
        return( 3 * three_powered( power - 1 ));
}