[Java] 명품 자바 프로그래밍(Java Programming) 6장 Open Challenge

OpenChallenge.java

 

 
import java.io.IOException;
import java.io.InputStreamReader;
 
public class OpenChallenge06 {
    public static void main(String[] args) {
        InputStreamReader rd = new InputStreamReader(System.in);
 
        int[] histgram = new int[26];
 
        int c = 0;
 
        try {
            while (true) {
                c = rd.read();
 
                for (int i = 0; i < 26; i++) {
                    if (c == (i + 65) || c == (i + 97)) {
                        histgram[i]++;
                    }
                }
 
                if (c == -1) {
                    break;
                }
 
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
 
        for (int i = 0; i < 26; i++) {
            System.out.print((char) (i + 65));
 
            for (int j = 0; j < histgram[i]; j++) {
                System.out.print("-");
            }
            System.out.println();
        }
    }
}
 

실행 결과: