题解 | #统计字符#

/*
 * 时间: 2021-05-09
 */
import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (sc.hasNextLine()) {
            String str = sc.nextLine();
            int[] count = new int[4];
            for (int i = 0; i < str.length(); i++) {
                char ch = str.charAt(i);
                if (ch >= 'a' && ch <= 'z' || ch >= 'A' && ch <= 'Z') {
                    count[0]++;
                } else if (ch == ' ') {
                    count[1]++;
                } else if (ch >= '0' && ch <= '9') {
                    count[2]++;
                } else {
                    count[3]++;
                }
            }

            for (int i: count) {
                System.out.println(i);
            }
        }
    }
}