Add doc

2 changed files with 1 additions and 16 deletions
--- a/YUAN(2).cpp
+++ b/YUAN(2).cpp
@ -1,16 +0,0 @@
-#include<iostream>
-using namespace std;
-
-int main()
-{  
-    const double pi=3.14;
-    double r,c,s;
-    cin>>r;
-    c=2.0*pi*r ;
-    s=pi*r*r;
-    cout<<c<<endl;
-    cout<<s<<endl;
-    
-
-    return 0 ;
-}
--- a/1
+++ b/1
@ -0,0 +1 @@
+undefined