Roller skating rink repair

[Cpp]/** Copyright (c) 2013, School of Computer Science, Yantai University * All rights reserved. * file name: test. cpp * Author: Liu Qingyuan * Completion Date: July 15, March 15, 2013 * version: v1.0 ** input Description: none * Problem description: * program output: * Problem Analysis: * Algorithm Design: slightly */# include <iostream> # define pi 3.14 using namespace std; class Circle {private: double radius; public: double area (); double circumference (); void setRadius (double n) ;}; double Circle: area () {return pi * radius;} double Circl E: circumference () {return 2 * pi * radius;} void Circle: setRadius (double n) {radius = n;} int main () {double r; cout <"Enter the roller rink radius:"; cin> r; Circle c; c. setRadius (r); cout <"The cost of the roller rink is" <20 * c. area () + 35 * c. circumference () <"Yuan. "<Endl; return 0;}/** Copyright (c) 2013, School of Computer Science, Yantai University * All rights reserved. * file name: test. cpp * Author: Liu Qingyuan * Completion Date: July 15, March 15, 2013 * version: v1.0 ** input Description: none * Problem description: * program output: * Problem Analysis: * Algorithm Design: slightly */# include <iostream> # define pi 3.14 using namespace std; class Circle {private: double radius; public: double area (); double circumference (); void setRadius (double n) ;}; double Circle: area () {return pi * radius;} dou Ble Circle: circumference () {return 2 * pi * radius;} void Circle: setRadius (double n) {radius = n;} int main () {double r; cout <"Enter the roller rink radius:"; cin> r; Circle c; c. setRadius (r); cout <"The cost of the roller rink is" <20 * c. area () + 35 * c. circumference () <"Yuan. "<Endl; return 0 ;}