团体程序设计天梯赛-练习集 L1-003. 个位数统计 JAVA

import java.util.Scanner;

class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s1=sc.nextLine();
		int a[]=new int[10];
		for (int i = 0; i < s1.length(); i++) {
			char c=s1.charAt(i);
			switch (c) {
			case '0':
				a[0]++;
				break;
			case '1':
				a[1]++;
				break;
			case '2':
				a[2]++;
				break;
			case '3':
				a[3]++;
				break;
			case '4':
				a[4]++;
				break;
			case '5':
				a[5]++;
				break;
			case '6':
				a[6]++;
				break;
			case '7':
				a[7]++;
				break;
			case '8':
				a[8]++;
				break;
			case '9':
				a[9]++;
				break;
			}
		}
		for (int i = 0; i < a.length; i++) {
				if(a[i]!=0)
					System.out.println(i+":"+a[i]);
		}
		
	}
}