下面是使用Python语言编写的源程序代码：```pythonimport math# 读取半径值r = float(input("请输入圆的半径："))# 计算周长和面积circumference = 2 * math.pi * rarea = math.pi * r ** 2# 输出周长和面积print("圆的周长为：{:.3f}".format(circumference))print("圆的面积为：{:.3f...
您好根据质料查找，# include int main ( ) { float radius, area, circum; printf ( "Input radius: " ); scanf ( "%f", &radius ); area = 3.14 * radius * radius; circum = 2 * 3.14 * radius; printf ( "Area is:\n %6.3f\n", area ); printf ( "Circumference is:\...