[백준11720] 숫자의 합 구하기(001)

 

 

https://www.acmicpc.net/problem/11720

11720번: 숫자의 합

 

package Chapter1;
import java.util.*;

public class BJ11720 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int num = sc.nextInt();

        String stringNum = Integer.toString(num);
        char[] charNum = stringNum.toCharArray();

        int sum = 0;
        for (int i=0; i<n; i++) {
            sum += stringNum.charAt(i) - '0';
        }

        System.out.println(sum);
    }
}

 

조금 더 간단하게

 

package Chapter1;
import java.util.*;

public class BJ11720 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int num = sc.nextInt();

        String stringNum = Integer.toString(num);
        // char[] charNum = stringNum.toCharArray();

        int sum = 0;
        for (int i : stringNum.toCharArray()) {
            sum += i - '0';
        }

        System.out.println(sum);
    }
}