#include?

const?float?PI?=?3.14152;
const?float?FencePrice?=?3.50;
const?float?ConcretePrice?=?0.50;

//?declare?Circle?class?with?data?and?method?declarations
class?Circle
{
????private:
????????//?data?member?radius?is?a?floating?point?number
????????float???radius;
????????
????public:
????????//?constructor????????????????
????????Circle（float?r）;
????????
????????//?measurement?functions
????????float?Circumference（）?const;
????????float?Area（）?const;
};

//?class?implementation

//?constructor?initializes?the?radius?data?member
Circle::Circle（float?r）:?radius（r）
{?}

//?return?circumference
float?Circle::Circumference（）?const
{
????return?2?*?PI?*?radius;
}
????????
//?return?area?
float?Circle::Area（）?const
{
????return?PI?*?radius?*?radius;
}

void?main?（）
{
????float?radius;
????float?FenceCost?ConcreteCost;?

????//?set?fixed?point?output?with?2?decimal?places
????cout.setf（ios::fixed）;
????cout.setf（ios::showpoint）

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????9049??2009-05-04?07:06??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch1\ico-arrow.gif

?????文件???????1731??1994-11-26?02:08??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch1\prg1_1.cpp

?????文件???????2750??1995-01-01?03:21??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch1\prg1_2.cpp

?????文件??????33576??1998-08-21?07:53??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch1\prg1_2.ide

?????文件?????????79??1995-07-15?14:10??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch1\readme.txt

?????目錄??????????0??2010-07-01?17:56??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch1

?????文件????????142??1994-11-26?02:11??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch10\bigmaze.dat

?????文件?????????48??1994-11-26?02:11??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch10\maze1.dat

?????文件?????????85??1994-11-26?02:11??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch10\maze2.dat

?????文件????????627??1995-01-09?11:33??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch10\prg10_1.cpp

?????文件???????1090??1995-01-09?11:31??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch10\prg10_2.cpp

?????文件????????551??1995-01-09?11:33??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch10\prg10_3.cpp

?????文件????????715??1995-01-09?06:36??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch10\prg10_4.cpp

?????文件???????1308??1995-01-09?11:35??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch10\prg10_5.cpp

?????文件????????830??1995-01-09?06:37??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch10\prg10_6.cpp

?????文件????????556??1995-01-09?06:37??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch10\prg10_7.cpp

?????文件?????????46??1994-11-26?02:11??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch10\vocab.dat

?????目錄??????????0??2010-07-01?17:55??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch10

?????文件????????187??1994-11-27?04:11??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch11\concord.txt

?????文件????????734??1995-01-11?16:00??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch11\prg11_1.cpp

?????文件????????908??1998-08-21?09:54??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch11\prg11_2.cpp

?????文件????????922??1998-08-21?09:40??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch11\prg11_3.cpp

?????文件???????1349??1998-08-21?09:50??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch11\prg11_4.cpp

?????文件???????1467??1998-08-21?09:43??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch11\prg11_5.cpp

?????文件???????2011??1998-08-21?09:44??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch11\prg11_6.cpp

?????目錄??????????0??2010-07-01?17:55??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch11

?????文件????????111??1994-11-26?02:12??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch12\figures

?????文件???????9049??2009-05-04?07:06??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch12\ico-arrow.gif

?????文件???????1259??1995-03-13?08:03??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch12\prg12_1.cpp

?????文件??????30822??1998-08-21?07:54??ftsoftds1st_src\1?（39）.net\ftsoftds?1st?edition\ch12\prg12_1.ide

............此處省略196個文件信息