14-week Task 3 (area calculation)

/** Copyright and version declaration section of the Program * Copyright (c) 2013, student * All rightsreserved from computer College of Yantai University. * file name: score. cpp * Author: Liu Yuanlong * Completion Date: July 15, May 31, 2013 * version: v1.0 * input Description: * Problem description: * output: */# include <iostream> using namespace std; // empty base class csolid {public: virtual void area () {cout <"did not tell me how to find the information:";} virtual void v () {cout <"did not tell me how to find the information! ";}}; // Cube class cball: public csolid {public: cball (double); void area (); void v (); protected: double d ;}; cball: cball (double R) {d = R;} void cball: area () {double s; s = d * d; cout <"area: "<s <" ";}void cball: v () {double v; v = d * d; cout <" volume: "<v; cout <endl;} // ball class ccylinder: public csolid {public: ccylinder (double); void area (); void v (); protected: double r ;}; ccylinder: ccylinder (double X) {r = X;} void ccylinder: area () {double s; s = 4*3.14 * r; cout <"Area:" <s <";} void ccylinder: v () {double v; v = (4/3) * r; cout <"volume:" <v <endl ;}// cylinder class ccube: public csolid {public: ccube (double, double); void area (); void v (); protected: double a, B ;}; ccube: ccube (double X, double Y) {a = X; // The ground radius of the cylinder B = Y; // cylinder height} void ccube: area () {double s; s = (3.14*2 * a * B) + (2*3.14 * ); cout <"Area:" <s <";} void ccube: v () {double v; v = 3.14 * a * B; cout <"volume:" <v <endl ;}int main () {ccube c1 (4.5); cball r1 (4); ccylinder t1 ); csolid * p = & c1; p-> area (); p-> v (); p = & r1; p-> area (); p-> v (); p = & t1; p-> area (); p-> v (); return 0 ;}

Running result: