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#include <iostream>
using namespace std;
class Strategy {
    virtual void Interface() = 0;
    virtual ~Strategy() { }
class ConcreteStrategyA :public Strategy {
    void Interface() {
        cout << "ConcreteStrategyA::Interface..." << endl;
class ConcreteStrategyB :public Strategy {
    void Interface() {
        cout << "ConcreteStrategyB::Interface..." << endl;
class Context {
    Context(Strategy *stg) {
        _stg = stg;
    void DoAction() {
        _stg->Interface();
    Strategy *_stg;
int main() {
    Strategy *ps = new ConcreteStrategyA();
    Context *pc = new Context(ps);
    pc->DoAction();
    delete pc;
    delete ps;
    return 0;

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StrategyPattern.cpp

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