[기초 - 비트시프트연산] 1047-1048 [자바]

1047

정수 1개를 입력받아 2배 곱해 출력해보자.

 

 

import java.io.*;
import java.util.*;

//1047
public class Main{ 
    public static void main(String args[]) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int a = Integer.parseInt(br.readLine());

        System.out.println(a<<1);



    }
}

 

 

1048

정수 2개(a, b)를 입력받아 a를 2b배 곱한 값으로 출력해보자.

 

 

import java.io.*;
import java.util.*;

//1048
public class Main{ 
    public static void main(String args[]) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine()," ");
        int a = Integer.parseInt(st.nextToken());
        int b = Integer.parseInt(st.nextToken());
        System.out.println(a<<b);



    }
}