c++0x新特性实例(比较常用的)

//array

 #include <array>
 
 void Foo()
 {
     array<int,> a;
     generate(a.begin(),a.end(),rand);
     sort(a.begin(),a.end());
 
     for (auto n:a)
     {
         cout<<n<<endl;
     }
     cout<<"sizeof(a)="<<sizeof(a)<<endl;
 }

//auto

 #include <vector>
 void Foo()
 {
     auto a = ;
     cout<<a<<endl;
 
     auto b = 20.0f;
     cout<<b<<endl;
 
     auto& c = a;
     c++;
     cout<<a<<endl;
 
     vector<int> vec;
 
     for(int i = ; i<; i++)
     {
         vec.push_back(i);
     }
 
     for(auto i = vec.cbegin(); i!=vec.cend(); i++)
     {
         cout<<*i<<endl;
     }
 
     auto pF = [&c](int i)->int{ return c+=i; };
     cout<<pF()<<endl;
     cout<<a<<endl;
 }

//regex

 #include <regex>
 void Foo()
 {
     if( regex_match("Hello World!",std::regex("Hello .....!")) )
     {
         cout<<"Math!"<<endl;
     }
 
     if( regex_search("321Hello World!765",std::regex("Hello .....!")) )
     {
         cout<<"Search!"<<endl;
     }
 
 }

//thread

 void Foo()
 {
     thread t1([]
     {
         for (int i = ; i < ; i++)
         {
             cout<<"t1:"<<i<<endl;
         }
     }
     );
 
     thread t2([]
     {
         for (int i = ; i < ; i++)
         {
             cout<<"t2:"<<i<<endl;
         }
     }
     );
 
     t1.join();
     t2.join();
 }

//future

 #include <future>
 int Test(int a,int b)
 {
     cout<<"Test("<<a<<","<<b<<")"<<endl;
     return a+b;
 }
 
 void Foo()
 {
     future<int> f1 = async(Test,,);
     cout<<"f1"<<endl;
     future<int> f2 = async(Test,,);
     cout<<"f2"<<endl;
     future<int> f3 = async(Test,,);
     cout<<"f3"<<endl;
 
     cout<<f1.get()<<endl<<f2.get()<<endl<<f3.get()<<endl;
 }

//enum class

 void Foo()
 {
 #define MAKE_STR(s) #s
     enum class Type
     {
         I = ,
         II,
         III,
         IV,
         V
     };
 
     if (==(int)Type::V)
     {
         cout<<MAKE_STR(Type::V);
     }
 }

//tuple

 tuple<int,string,float> Do()
 {
     return make_tuple(,"hi",20.0f);
 }
 void Foo()
 {
     int a = ;
     string s = "";
     float b = .0f;
     tie(a,s,b) = Do();
 
     cout<<a<<endl;
     cout<<s.c_str()<<endl;
     cout<<b<<endl;
 }

//lambda

 #include <functional>
 void Foo()
 {
     int a = ;
     int b = ;
     function<int(int)> pA = [&a,b](int i)->int{ return a+=b+i; };
     cout<<pA()<<endl;
     cout<<a<<endl;
 
     //function<int(int)> pB = [&a,b](int i)->int{ return b+=a+i; }; compile error : 'b': a by-value capture cannot be modified in a non-mutable lambda
     cout<<b<<endl;
 
     auto pC = [&](int i)->int{ return pA(i); };
     cout<<pC();
 }

//final

 class A final
 {
 };
 /*
 class B : public A
 {
 };
 */
 class C
 {
     virtual void c()final{ }
 };
 
 class D : public C
 {
     //virtual void c(){ }
 };

//override

 class A
 {
     virtual void a(){}
 };
 
 class B : public A
 {
     virtual void a()override{}
     //virtual void a(int i)override{} error
     //virtual void c()override{} error
 };