物料变更回调(C++)

#include <iostream>
#include <functional>

// 定义回调函数类型
using CallbackType = std::function<void(const std::string&)>;

// 物料变更处理类
class MaterialManager {
public:
    // 设置回调函数
    void setCallback(CallbackType callback) {
        callback_ = callback;
    }

    // 模拟物料变更
    void changeMaterial(const std::string& newMaterial) {
        std::cout << "Material changed to: " << newMaterial << std::endl;
        // 调用回调函数
        if (callback_) {
            callback_(newMaterial);
        }
    }

private:
    CallbackType callback_;
};

// 回调函数实现
void onMaterialChanged(const std::string& material) {
    std::cout << "Callback: Material has been changed to " << material << std::endl;
}

int main() {
    MaterialManager manager;
    // 设置回调函数
    manager.setCallback(onMaterialChanged);

    // 模拟物料变更
    manager.changeMaterial("New Material");

    return 0;
}