Create 1869.cpp

2016-10-24 17:03:49 +08:00 · 2016-10-24 17:03:49 +08:00 · 8b8404ed3a
parent 9aeb76975f
commit 8b8404ed3a
1 changed files with 11 additions and 0 deletions
--- a/QUSTOJ/1869.cpp
+++ b/QUSTOJ/1869.cpp
@ -0,0 +1,11 @@
+#include <iostream>
+using namespace std;
+
+int main()
+{
+    int a;
+    const double pi=3.14;
+    cin>>a;
+    cout<<a*a*pi<<endl;
+    return 0;
+}