#include <algorithm>
#include <vector>
using namespace std;#define MAX_NAME_LEN    32
struct Student
{int     no;char    name[MAX_NAME_LEN];int     age;bool operator==(const Student& other) const{return no == other.no;}bool operator==(int studentNo) const{return no == studentNo;}
};typedef std::vector<Student> TVecStudent;Student g_students[] =
{{1,     "James",    17},{2,     "Tom",      16},{3,     "David",    18},{4,     "Paul",     15},
};void InitStudent(TVecStudent& students)
{students.assign(&g_students[0], &g_students[0] + sizeof(g_students)/sizeof(g_students[0]));
}void PrintStudent(const Student& student)
{printf("no:%d, name:%s, age:%d\n", student.no, student.name, student.age);
}void PrintStudents(TVecStudent& students)
{TVecStudent::const_iterator iter = students.begin();for (; students.end() != iter; ++iter){const Student& student = *iter;PrintStudent(student);}
}// 小于比较函数运算子
bool lessStudentAge(const Student& lft, const Student& rht)
{return lft.age < rht.age;
}// 大于比较函数对象运算子
struct GreaterAgeSorter
{bool operator()(const Student& lft, const Student& rht){return lft.age > rht.age;}
};// 学号查找函数对象运算子
struct StudentNoFinder
{StudentNoFinder(int no){m_no = no;}bool operator()(const Student& student) const{return student.no == m_no;}private:int m_no;
};

void testVector()
{TVecStudent students;InitStudent(students);printf("Origin students:\n");PrintStudents(students);std::sort(students.begin(), students.end(), lessStudentAge);printf("\n\nSorted by age asc:\n");PrintStudents(students);std::sort(students.begin(), students.end(), GreaterAgeSorter());printf("\n\nSorted by age desc:\n");PrintStudents(students);TVecStudent::const_iterator itFind;itFind = std::find(students.begin(), students.end(), 1);if (students.end() != itFind){printf("\n\nStudent found:\n");PrintStudent(*itFind);}itFind = std::find_if(students.begin(), students.end(), StudentNoFinder(2));if (students.end() != itFind){printf("\n\nStudent found:\n");PrintStudent(*itFind);}
}int main()
{testVector();return 0;
}

Origin students:
no:1, name:James, age:17
no:2, name:Tom, age:16
no:3, name:David, age:18
no:4, name:Paul, age:15Sorted by age asc:
no:4, name:Paul, age:15
no:2, name:Tom, age:16
no:1, name:James, age:17
no:3, name:David, age:18Sorted by age desc:
no:3, name:David, age:18
no:1, name:James, age:17
no:2, name:Tom, age:16
no:4, name:Paul, age:15Student found:
no:1, name:James, age:17Student found:
no:2, name:Tom, age:16