案例

书接上回
- 鞋贩子的规模扩大，但是人员不够，就开始招聘。
- 收到很多建立就叫了几个组长，经理过来一起看简历。组长们选，经理再选，最后把合适的给鞋贩子看。

案例

#include <iostream>
#include <string>
#include <vector>
#include <functional>


class MianShiZhe {
public:
 virtual std::string info() = 0;
};

class Age18_22 : public MianShiZhe {
public:
 Age18_22(std::string name,std::string info):name_(name),info_(info){}
 std::string info() {
   return name_ + ":" + info_;
 }
private:
 std::string name_;
 std::string info_;
};


class Age22_26 : public MianShiZhe {
public:
 Age22_26(std::string name,std::string info):name_(name),info_(info){}
 std::string info() {
   return name_ + ":" + info_;
 }
private:
 std::string name_;
 std::string info_;
};

class Age26_40 : public MianShiZhe {
public:
 Age26_40(std::string name,std::string info):name_(name),info_(info){}
 std::string info() {
   return name_ + ":" + info_;
 }
private:
 std::string name_;
 std::string info_;
};

/************************/

class SaiXuan {
public:
 virtual std::vector<MianShiZhe*> SaiJianLi(std::vector<MianShiZhe*> ) = 0;
};

using TiaoJian = std::function<bool(MianShiZhe*)>;

class MianShiGuan : public SaiXuan {
public:
 MianShiGuan(TiaoJian tiaojian):tiaojian_(tiaojian){}

 std::vector<MianShiZhe*> SaiJianLi(std::vector<MianShiZhe*> jianli) {
   std::vector<MianShiZhe*> temp;
   for (auto mianshizhe:jianli) {
     if(tiaojian_(mianshizhe)) {
       temp.emplace_back(mianshizhe);
     }
   }
   return temp;
 }
private:
 TiaoJian tiaojian_;
};

int main() {
 std::vector<MianShiZhe*> gangwei;
 gangwei.emplace_back(new Age18_22("xiaoli","19,gaozhong,1nian"));
 gangwei.emplace_back(new Age26_40("xiaosi","18,yanjiusheng,1nian"));
 gangwei.emplace_back(new Age22_26("xiaomi","24,benke,2nian"));

 SaiXuan* zuzhang = new MianShiGuan([](MianShiZhe* jianli){
   auto info = jianli->info();
   return info.npos != info.find("2nian");
 });

 auto ret = zuzhang->SaiJianLi(gangwei);
 for(auto i:ret) {
   std::cout << i->info() << std::endl;
 }
}