第三次实验课代码

添加NumberCounter和EncryptDemo

C03 ControlFlow/src/NumberCounter.java

@@ -0,0 +1,17 @@
+import java.util.Scanner;
+
+public class NumberCounter {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        long num = sc.nextLong();
+        int[] hash = new int[10];
+        while(num>0){
+            hash[(int)(num%10)]++;
+            num/=10;
+        }
+
+        for(int i : hash)
+            System.out.print(i+" ");
+        System.out.println();
+    }
+}