程序设计输入一行数字字符用数组元素作为记数器来统计每个数字字符的个数

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication2
{
class Program
{
static void Main(string[] args)
{
String s = Console.ReadLine();
char[] c = s.ToCharArray();
int[] ii = new int[10] {0,0,0,0,0,0,0,0,0,0};
for (int i = 0; i < c.Length; i++)
{
switch (c[i])
{
case '0': ii[0]++; break;
case '1': ii[1]++; break;
case '2': ii[2]++; break;
case '3': ii[3]++; break;
case '4': ii[4]++; break;
case '5': ii[5]++; break;
case '6': ii[6]++; break;
case '7': ii[7]++; break;