vector常见用法

 1 #include <boost/foreach.hpp>
 2 #include <iostream>
 3 #include <vector>
 4 #include <boost/foreach.hpp>
 5 using namespace std;
 6 using namespace boost;
 7 class Test
 8 {
 9 public:
10     Test(int a){
11         age=a;
12     }
13     int age;
14     bool   operator < ( const   Test&   rhs )  const {   //升序排序时必须写的函数
15         return   age   <   rhs.age;
16     }
17     bool   operator > ( const   Test&   rhs )  const {   //降序排序时必须写的函数
18         return   age   >   rhs.age;
19     }
20 };
21 int main(void)
22 {
23     vector<Test> data;
24     Test t1(1);
25     Test t2(2);
26     Test t3(3);
27     Test t4(4);
28     data.push_back(t1);
29     data.push_back(t2);
30     data.push_back(t3);
31     data.push_back(t4);
32     //1. 遍历
33     for (vector<Test>::iterator it=data.begin(); it!=data.end(); it++) {
34         cout<<it->age<< std::endl;
35     }
36     //2. 排序
37     std::sort ( data.begin(), data.end(),greater<Test>() ); //lesss 升序
38     //3. boost遍历
39     BOOST_FOREACH(const Test& t,data)
40     {
41         cout<<t.age<< std::endl;
42     }
43     //4. 删除多个元素
44     for ( vector<Test>::iterator it = data.begin(); it != data.end(); ) {
45         if ( it->age == 1   || it->age == 3 ) {
46             it = data.erase ( it );
47         } else {
48             it++;
49         }
50     }
51     std::sort ( data.begin(), data.end(),less<Test>() ); //lesss 升序
52     BOOST_FOREACH(const Test& t,data)
53     {
54         cout<<t.age<< std::endl;
55     }
57     return 0;
58 }