量化交易之C++篇 - 适配器

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

using namespace std;

class MyPrint: public binary_function<int, int, void> { // int: 类型  int: 类型  void: 返回值

public:
  void operator()(int value, int start) const {
    cout << "value: " << value << "    start: " << start << "    value + start: " << value + start << endl;
  }
};

void test01() {
  vector<int>vector1;

  for (int i = 0; i < 10; i++) {
    vector1.push_back(i + 1);
  }

  int number;
  cout << "请输入起始值: ";
  cin >> number;

  for_each(vector1.begin(), vector1.end(), bind2nd(MyPrint(), number));
  for_each(vector1.begin(), vector1.end(), bind1st(MyPrint(), number));
}


class GreaterThenFive: public unary_function<int, bool> {

public:
  bool operator()(int value1) const {
    return value1 > 5;
  }
};

void test02() {

  vector<int> vector2;
  for (int i = 0; i < 10; i++) {
    vector2.push_back(i);
  }

  //vector<int>::iterator position = find_if(vector2.begin(), vector2.end(), not1(GreaterThenFive()));
  vector<int>::iterator position = find_if(vector2.begin(), vector2.end(), not1(bind2nd(greater<int>(), 5)));
  if (position != vector2.end()) {
    cout << "找到小于5的数字为: " << *position << endl;
  } else {
    cout << "没有找到";
  }
}

void myPrint(int value, int start) {
  cout << "value: " << value << "   start: " << start << endl;
}

void test03() {

  vector<int> vector3;
  for (int i = 0; i < 10; i++) {
    vector3.push_back(i);
  }
  for_each(vector3.begin(), vector3.end(), bind2nd(ptr_fun(myPrint), 100));
}


class Person {

public:
  Person(string name, int age) {
    this->name = name;
    this->age = age;
  }

  void showPerson() {
    cout << "name: " << this->name << "   age: " << this->age << endl;
  }

  void plusAge() {
    this->age += 100;
  }

  string name;
  int age;
};

void myPrintPerson(Person& person) {
  cout << "name: " << person.name << "   age: " << person.age << endl;
}

void test04() {

  vector<Person> personVector;

  Person person1("roger1", 19);
  Person person2("roger2", 20);
  Person person3("roger3", 21);
  Person person4("roger4", 22);

  personVector.push_back(person1);
  personVector.push_back(person2);
  personVector.push_back(person3);
  personVector.push_back(person4);

  for_each(personVector.begin(), personVector.end(), mem_fun_ref(&Person::showPerson));
  for_each(personVector.begin(), personVector.end(), mem_fun_ref(&Person::plusAge));
  for_each(personVector.begin(), personVector.end(), mem_fun_ref(&Person::showPerson));
}

int main() {

  //test01();

  //test02();

  //test03();

  test04();

  return EXIT_SUCCESS;
}