boost之tuple

tuple的基本用法

#include <iostream>#include <boost/typeof/typeof.hpp>#include <boost/assign.hpp>#include <boost/tuple/tuple.hpp>#include <boost/tuple/tuple_io.hpp>using namespace std;using namespace boost;using namespace boost::assign;using namespace boost::tuples;int main(){    ///////初始化    typedef boost::tuple<int, string, double> my_tuple;    my_tuple t1;    my_tuple t2(1,"lijiajia");    my_tuple t3(t1);    my_tuple t4 = t1;    ////元素类型是引用的时候，初始化时必须赋初值    int x = 10;    boost::tuple<int&>t5(x);    ///////make_tuple    make_tuple(2,3.0);    make_tuple(string(),vector<int>());    /////访问元素使用t.get<>()    BOOST_AUTO(tt,make_tuple(1,"char[]",100.0));    assert(tt.get<0>() == 1);    assert(tt.get<1>() == "char[]");    assert(tt.get<2>() == 100.0);    //////访问元素使用boost::get<>()    cout<<get<0>(tt);    assert(get<0>(tt) == 1);    assert(get<1>(tt) == "char[]");    assert(get<2>(tt) == 100.0);    make_tuple(1, 11.11, string("lijiajia"));    ////////比较操作    typedef boost::tuples::tuple <int, double, string>my_tuple1;    //my_tuple1 tt1 = make_tuple(1, 11.11, string("lijiajia"));/////不起效果  why boost::tuples::make_tuple(1, 11.11, string("lijiajia"))    //my_tuple1 tt2 = make_tuple(2,22.22,string("caoyanyan"));/////不起效果   why boost::tuples::make_tuple(1, 11.11, string("lijiajia"))    my_tuple1 tt1(1, 11.11, string("lijiajia"));    my_tuple1 tt2(2, 22.22, string("caoyanyan"));    my_tuple1 tt3(tt2);    assert(tt1 > tt2);    assert(tt2 == tt3);    /////输入输出    cout << "tt1 = " << tt1 << endl;/////不起效果  why  加上#include <boost/tuple/tuple_io.hpp>    cout << "tt2 = " << tt2 << endl;/////不起效果  why  加上#include <boost/tuple/tuple_io.hpp>    cout << "please input the tt1:" << endl;    cin >> tt1;/////不起效果  why   加上#include <boost/tuple/tuple_io.hpp>    cout <<"tt1 = " <<tt1 << endl;    cout << "after set_open set_close set_delimiter....." << endl;    cout << tuples::set_open('[') << tuples::set_close(']');    cout << tuples::set_delimiter(',');    cout << tt1 << endl;    /////tie的使用    int i;    double d;    string s;    tie(i, d, s) = boost::tuples::make_tuple(1,22.2,"lijiajia");    cout << "i = " << i << endl << "d = " << d << endl << "s = " << s << endl;    /////占位符的使用tuples::ignore    tie(i, tuples::ignore, tuples::ignore) = boost::tuples::make_tuple(1,NULL,NULL);    ////tie使用于pair    tie(i, s) = make_pair(1,"lijiajia_caoyanyan");    cout << "i = " << i << endl<< "s = " << s << endl;    //////与assign结合使用    vector<my_tuple1> my_vec = tuple_list_of(1,11.11,"lijiajia")(2,22.22,"caoyanyan");    assert(my_vec.size() == 2);    my_vec += boost::tuples::make_tuple(3, 33.33, "dabao"), boost::tuples::make_tuple(4, 44.44, "baierwei");    assert(my_vec.size() == 4);    system("pause");    return 0;}