主程序

/*將抽象部分與實現部分分離，使它們都能夠獨立的變化*/ #include "bridge.h"int main() {cout <<"main start" <<endl; sample smp;smp.display();cout <<"main end" <<endl; //sample::bridge bri; //error: ‘class sample::bridge’ is privatereturn 0; }
bridge.h

#include <boost/smart_ptr.hpp> #include <iostream> using namespace boost; using namespace std; class sample {private:class bridge;shared_ptr<bridge> bptr;public:sample();void display(); };class sample::bridge {public:void display(); };
bridge.cpp

#include "bridge.h" sample::sample() {bptr = make_shared<bridge>(); } void sample::display() {bptr->display(); } void sample::bridge::display() {cout << "bridge display!"<<endl; }
makefile

.SUFFIXES:.h .c .cpp .oCC=$(CXX) $(CXX_FLAG)RM = rm SRCS = bridge.cpp main.cpp PROGRAM = bridge OBJS=$(SRCS:.cpp=.o)INC_PATH = -I$(BOOST_INCLUDE) LIB_PATH = -L$(BOOST_LIB) LIBS = -lboost_date_time$(PROGRAM):$(OBJS)$(CC) $? $(LIB_PATH) $(LIBS) -o $@$(OBJS):$(SRCS)$(CC) $(CPPFLAGS) -c $(SRCS) $(INC_PATH).PHONY:clean clean:$(RM) $(PROGRAM) $(OBJS)

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