int R =5;
Double pi =3.14;
Double zhouchang =2*R*pi;
Double mianji = pi * R * R;
Console.WriteLine(" 圆的面积是{0},圆的周长是{1}",mianji,zhouchang);
Console.ReadKey();
int R =5;
Double pi =3.14;
Double zhouchang =2*R*pi;
Double mianji = pi * R * R;
Console.WriteLine(" 圆的面积是{0},圆的周长是{1}",mianji,zhouchang);
Console.ReadKey();
本文标题:2018-10-25求半径5的圆面积和周长
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