[CodeUp] 1031-1037 (Java)

# 1031 : 10진수 → 8진수

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int num = sc.nextInt(); 
        String octal = Integer.toOctalString(num); // 10진수 -> 8진수
        System.out.println(octal);
        sc.close();
    }
}

 

# 1032 : 10진수 → 16진수

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int num = sc.nextInt(); 
        String hex = Integer.toHexString(num); // 10진수 -> 16진수
        System.out.println(hex);
        sc.close();
    }
}

 

# 1033 : 10진수 → 16진수(대문자로)

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int num = sc.nextInt(); 
        String hex = Integer.toHexString(num); // 10진수 -> 16진수
        System.out.println(hex.toUpperCase());
        sc.close();
    }
}

 

# 1034 : 8진수 → 10진수

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String octal = sc.next();
        System.out.println(Integer.parseInt(octal,8)); // 8진수 -> 10진수
        sc.close();
    }
}

 

# 1035 : 16진수 → 8진수

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String hex = sc.next();
        int num = Integer.parseInt(hex, 16); // 16진수 -> 10진수
        String octal = Integer.toOctalString(num); // 10진수 -> 8진수
        System.out.println(octal);
        sc.close();
    }
}

 

# 1036 : 문자  → 정수

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        char ch = sc.next().charAt(0);
        int num = (int)ch; // 문자 -> 숫자
        System.out.println(num);
        sc.close();
    }
}

 

# 1037 : 정수  → 문자

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int num = sc.nextInt();
        char ch = (char)num; // 숫자 -> 문자
        System.out.println(ch);
    }
}

 

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