In order to compute a power of two, you can take the next-lower power and double it. For example, if you want to compute 2^11 and you know that 2^10=1024, then 2^11=2×1024=2048. Write a recursive method public static int pow2(int n) where n is the exponent, that is based on this observation. If the exponent is negative, return -1. import java.util.Scanner; public class PowerTwo { public static int pow2(int n) { /* code goes here */ } public static void main(String[] args) { Scanner in = new Scanner(System.in); while (in.hasNextInt()) { int exponent = in.nextInt(); System.out.println(pow2(exponent)); } } }
In order to compute a power of two, you can take the next-lower power and double it. For example, if you want to compute 2^11 and you know that 2^10=1024, then 2^11=2×1024=2048. Write a recursive method public static int pow2(int n) where n is the exponent, that is based on this observation. If the exponent is negative, return -1. import java.util.Scanner; public class PowerTwo { public static int pow2(int n) { /* code goes here */ } public static void main(String[] args) { Scanner in = new Scanner(System.in); while (in.hasNextInt()) { int exponent = in.nextInt(); System.out.println(pow2(exponent)); } } }
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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In order to compute a power of two, you can take the next-lower power and double it. For example, if you want to compute 2^11 and you know that 2^10=1024, then 2^11=2×1024=2048. Write a recursive method
public static int pow2(int n)where n is the exponent, that is based on this observation. If the exponent is negative, return -1.
import java.util.Scanner;
public class PowerTwo
{
public static int pow2(int n)
{
/* code goes here */
}
public static void main(String[] args)
{
Scanner in = new Scanner(System.in);
while (in.hasNextInt())
{
int exponent = in.nextInt();
System.out.println(pow2(exponent));
}
}
}
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