1 //内建函数对象  算数仿函数  关系仿函数  //逻辑仿函数
  2 #include<iostream>
  3 #include<string>
  4 #include<functional>    //内建函数对象头文件
  5 #include<vector>
  6 #include<algorithm>
  7 
  8 //using namespace std;
  9 using namespace std;
 10 
 11 //negate 一元仿函数    取反仿函数
 12 void test01()
 13 {
 14     negate<int>n;
 15 
 16     cout<<n(50)<<endl;
 17 }
 18 
 19 
 20 
 21 
 22 //plus 二元仿函数  加法
 23 void test02()
 24 {
 25     plus<int>p;
 26 
 27     cout << p(10,20) << endl;
 28 }
 29 
 30 //关系仿函数
 31 class MyCompare
 32 {
 33 public:
 34     bool operator()(int v1,int v2)//const
 35     {
 36         return v1 > v2;
 37     }
 38 };
 39 
 40 
 41 //大于 greater
 42 void test03()
 43 {
 44     vector<int>v;
 45     v.push_back(10); 
 46     v.push_back(60);
 47     v.push_back(80);
 48     v.push_back(30);
 49     v.push_back(20);
 50 
 51     for (vector<int>::iterator it = v.begin(); it != v.end(); it++)
 52     {
 53         cout << *it << " ";
 54     }
 55     cout << endl;
 56 
 57     //升序
 58 
 59     sort(v.begin(), v.end());
 60     cout << "升序" << endl;
 61     for (vector<int>::iterator it = v.begin(); it != v.end(); it++)
 62     {
 63         cout << *it << " ";
 64     }
 65     cout << endl;
 66 
 67     //降序
 68     // greater<int>() 内建函数
 69     //sort(v.begin(), v.end(), MyCompare());
 70     sort(v.begin(), v.end(), greater<int>());
 71     cout << "降序" << endl;
 72     for (vector<int>::iterator it = v.begin(); it != v.end(); it++)
 73     {
 74         cout << *it << " ";
 75     }
 76     cout << endl;
 77 
 78 
 79 
 80 
 81 }
 82 
 83 //逻辑仿函数
 84 //逻辑非  longical_not
 85 void test04()
 86 {
 87     vector<bool>v;
 88     v.push_back(true);
 89     v.push_back(false); 
 90     v.push_back(true);
 91     v.push_back(false);
 92 
 93     cout << "v容器 =" << endl;
 94     for (vector<bool>::iterator it = v.begin(); it != v.end(); it++)
 95     {
 96         cout << *it << " ";
 97     }
 98     cout << endl;
 99 
100     //利用逻辑非 将容器v 搬运到 容器 V2中，并执行取反操作
101 
102     vector<bool>v2;
103     v2.resize(v.size());
104 
105     transform(v.begin(),v.end(),v2.begin(),logical_not<bool>());
106     
107     cout << "v2容器 =" << endl;
108     for (vector<bool>::iterator it = v2.begin(); it != v2.end(); it++)
109     {
110 
111         cout<<* it << " ";
112     }
113     cout << endl;
114 
115 
116 
117 }
118 
119 
120 
121 int main()
122 {
123 
124     test01();
125     test02();
126     test03();
127     test04();
128 
129 
130     system("pause");
131     return 0;
132 }