designpatterns -- strategy

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策略模式

#include <iostream>using namespace std;class Strategy{public:Strategy() {}~Strategy() {}virtual void Travel() = 0;};class StrategyWalk : public Strategy{public:StrategyWalk() {}~StrategyWalk() {}void Travel(){cout << "I walk to my company." << endl;}};class StrategyBus : public Strategy{public:StrategyBus() {}~StrategyBus() {}void Travel(){cout << "I go to work by bus." << endl;}};class User{public:User() {}~User() {}void GotoWork(){this->methord->Travel();}void SetStrategy(Strategy *tool){this->methord = tool;}private:Strategy *methord;};int main(int argc, char *argv[]){Strategy *tool = new StrategyBus();User *tom = new User();tom->SetStrategy(tool);tom->GotoWork();delete tool;delete tom;return 0;}