Lambda expression for stl-c++ 11 (bottom)

For a basic understanding of lambda, please refer to the previous address below:

Http://www.cnblogs.com/davidgu/p/4825625.html

Let's give an example of the STL using lambda for sorting, as follows:

Person.h

#ifndef _domain_models_person_h_#define_domain_models_person_h_#include<iostream>#include<string>#include<deque>using namespacestd;classPerson {friend Ostream&operator<< (ostream& S,Constperson&p);Private:    stringfn//First name    stringln//Last name    intAge ; Public: Person () {} person (Const string& F,Const string&N): FN (f), ln (n) {}stringFirstName ()Const; stringLastName ()Const; intGetage ()Const; voidSetage (inta); Static BOOLSortbyname (Constperson& P1,Constperson&p2); Static BOOLSortbyage (Constperson& P1,Constperson&p2); Static voidSortdequebyname (Deque<person> &persons); Static voidSortdequebyage (Deque<person> &persons); Static voidPrintpersondeques (deque<person>persons);};#endif

Person.cpp

#include <algorithm>#include"Person.h"inlinestringPerson::firstname ()Const {    returnfn;} InlinestringPerson::lastname ()Const {    returnLn;} InlineintPerson::getage ()Const{    returnAge ;}voidPerson::setage (inta) { Age=A;}/*binary Function predicate:*-Returns whether a person was less than another person*/BOOLPerson::sortbyname (Constperson& P1,Constperson&p2) {    /*A person was less than another person *-if the last name was less *-if the last name is equal and the first n Ame is less*/    returnP1.lastname () <p2.lastname () | |(P1.lastname ()= = P2.lastname () &&P1.firstname ()<p2.firstname ());}//another binary predicateBOOLPerson::sortbyage (Constperson& P1,Constperson&p2) {    returnP1.getage () <p2.getage ();}voidPerson::sortdequebyname (Deque<person> &persons) {    //Sort ElementsSort (Persons.begin (), Persons.end (),//RangePerson::sortbyname);//sort criterion}voidPerson::sortdequebyage (Deque<person> &persons) {    //Sort ElementsSort (Persons.begin (), Persons.end (),//RangePerson::sortbyage);//sort criterion}ostream&operator<< (ostream& S,Constperson&p) {s<<"["<< P.lastname () <<", "<< P.firstname () <<", "<< p.getage () <<"]"; returns;}voidPerson::p Rintpersondeques (deque<person>persons) {deque<Person>:: Iterator pos;  for(pos = Persons.begin (); pos! = Persons.end (); + +POS) {cout<< *pos <<Endl; }}

LambdaTest.cpp

#include <algorithm>#include<deque>#include<iostream>#include"LambdaTest.h"#include".. /.. /core/containerutil.h"using namespacestd;voidLambdatest::sortbylambda () {//Create some personsPerson P1 ("Nicolai","Josuttis"); Person P2 ("Ulli","Josuttis"); Person P3 ("Anica","Josuttis"); Person P4 ("Lucas","Josuttis"); Person P5 ("Lucas","Otto"); Person P6 ("Lucas","Arm"); Person P7 ("Anica","Holle"); P1.setage ( -); P2.setage ( -); P3.setage ( -); P4.setage (2); P5.setage ( A); P6.setage ( *); P7.setage ( the); //Insert person into collection CollDeque<person>Coll;    Coll.push_back (p1);    Coll.push_back (p2);    Coll.push_back (p3);    Coll.push_back (p4);    Coll.push_back (p5);    Coll.push_back (P6);    Coll.push_back (P7); cout<<"persons before sort:"<<Endl;    Person::p Rintpersondeques (coll); //sort Persons According to LastName (and FirstName)Sort (Coll.begin (), Coll.end (),//Range[](Constperson& P1,Constperson& p2) {//sort criterion        returnP1.lastname () <p2.lastname () | |(P1.lastname ()= = P2.lastname () &&P1.firstname ()<p2.firstname ());    }); cout<<"persons after sort by name:"<<Endl;    Person::p Rintpersondeques (coll); //sort Persons according to ageSort (Coll.begin (), Coll.end (),//Range[](Constperson& P1,Constperson& p2) {//sort criterion        returnP1.getage () <P2.getage ();    }); cout<<"persons after sort by:"<<Endl; Person::p Rintpersondeques (coll);}voidLambdatest::run () {Printstart ("Sortbylambda ()");    Sortbylambda (); Printend ("Sortbylambda ()");}

Operation Result:

----------------Sortbylambda (): Run Start----------------
Persons before sort:
[Josuttis, Nicolai, 20]
[Josuttis, Ulli, 30]
[Josuttis, Anica, 18]
[Josuttis, Lucas, 2]
[Otto, Lucas, 22]
[Arm, Lucas, 35]
[Holle, Anica, 95]
Persons after sort by name:
[Arm, Lucas, 35]
[Holle, Anica, 95]
[Josuttis, Anica, 18]
[Josuttis, Lucas, 2]
[Josuttis, Nicolai, 20]
[Josuttis, Ulli, 30]
[Otto, Lucas, 22]
Persons after sort by:
[Josuttis, Lucas, 2]
[Josuttis, Anica, 18]
[Josuttis, Nicolai, 20]
[Otto, Lucas, 22]
[Josuttis, Ulli, 30]
[Arm, Lucas, 35]
[Holle, Anica, 95]
----------------Sortbylambda (): Run End----------------

Lambda expression for stl-c++ 11 (bottom)