//:?S02:Area.cpp
//?From?“Thinking?in?C++?2nd?Edition?Volume?1?Annotated?Solutions?Guide“
//?by?Chuck?Allison?（c）?2001?MindView?Inc.?all?rights?reserved
//?Available?at?www.BruceEckel.com.
//{-T}?@echo?run?Area?by?hand!
#include?
using?namespace?std;

int?main（）?{
??const?float?pi?=?3.141592654;
??cout?<??
??float?radius;
??cin?>>?radius;
??cout?<}

/*?Sample?Execution:
c:>area
Enter?the?radius:?12
The?area?is?452.389
*/?///:~

?屬性????????????大小?????日期????時間???名稱
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