stl 学习笔记

set用法：

#include <set>class Test {public:    Test(int a,int b) {        this->a = a;        this->b = b;    }    bool operator < (const Test &t)const {        return b < t.b;    }    int a;    int b;};void test_set_compare() {    std::set<Test> test;    test.insert(Test(3,2));    test.insert(Test(5,5));    test.insert(Test(1,9));    test.insert(Test(6,1));    std::set<Test>::const_iterator iter_test;    for (iter_test = test.begin(); iter_test != test.end(); ++iter_test) {        std::cout << iter_test->a << "," << iter_test->b << std::endl;    }}int main() {    test_set_compare();    return 0;}