编辑“︁C++ 策略模式”︁（章节）

== 代码示例 ==
以下是一个简单的C++示例，展示策略模式的实现：

<syntaxhighlight lang="cpp">
#include <iostream>
#include <memory>

// 策略接口
class Strategy {
public:
    virtual void execute() const = 0;
    virtual ~Strategy() = default;
};

// 具体策略A
class ConcreteStrategyA : public Strategy {
public:
    void execute() const override {
        std::cout << "Executing Strategy A\n";
    }
};

// 具体策略B
class ConcreteStrategyB : public Strategy {
public:
    void execute() const override {
        std::cout << "Executing Strategy B\n";
    }
};

// 上下文类
class Context {
private:
    std::unique_ptr<Strategy> strategy;
public:
    explicit Context(std::unique_ptr<Strategy> strat) : strategy(std::move(strat)) {}
    
    void setStrategy(std::unique_ptr<Strategy> strat) {
        strategy = std::move(strat);
    }
    
    void executeStrategy() const {
        if (strategy) {
            strategy->execute();
        }
    }
};

int main() {
    Context context(std::make_unique<ConcreteStrategyA>());
    context.executeStrategy();  // 输出: Executing Strategy A
    
    context.setStrategy(std::make_unique<ConcreteStrategyB>());
    context.executeStrategy();  // 输出: Executing Strategy B
    
    return 0;
}
</syntaxhighlight>

'''输出:'''
<pre>
Executing Strategy A
Executing Strategy B
</pre>