ping_pong_ball.cc
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			#include "ping_pong_ball.hh"

			/* -------------------------------------------------------------------------- */
			void PingPongBall::printself(std::ostream& stream) const {

			Particle::printself(stream);

			stream << " " << radius;

			}

			/* -------------------------------------------------------------------------- */

			void PingPongBall::initself(std::istream& sstr) {

			Particle::initself(sstr);

			sstr >> radius;

			}

R7571/exercises/week10/correction/ping_pong_ball.cce16a226e15f1w12ex2_FR