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백준 2439 [별 찍기 - 2 ] - Java백준/단계별로 풀어보기 2021. 10. 2. 16:15
https://www.acmicpc.net/problem/2439
1. Scanner 사용
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int N = sc.nextInt(); sc.close(); for(int i=1; i<=N; i++) { // 행 for(int j=1; j<=N-i; j++) { // 공백 System.out.print(" "); } for(int k=1; k<=i; k++) { // 별 System.out.print("*"); } System.out.println(); } } }
2. BufferedReader, BufferedWriter 사용
import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.IOException; import java.io.InputStreamReader; import java.io.OutputStreamWriter; public class Main { public static void main(String[] args) throws IOException { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out)); int N = Integer.parseInt(br.readLine()); for(int i=1; i<=N; i++) { // 행 for(int j=1; j<=N-i; j++) { // 공백 bw.write(" "); } for(int k=1; k<=i; k++) { // 별 bw.write("*"); } bw.write("\n"); } br.close(); bw.flush(); bw.close(); } }
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