Update README.md

STZMYSH · Jul 16, 2022 · 31d8fe2 · 31d8fe2
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 第一个代码class hello world{
   void dayin(){
   System.out.print("hello world");
+  java循环嵌套计算水仙花 水仙花=new java循环嵌套计算水仙花;
+  水仙花.main(args);
   }
 }