1 // lambdaprj.cpp : Defines the entry point for the console application.
 2 //
 3 
 4 #include "stdafx.h"
 5 #include<algorithm>
 6 #include<vector>
 7 #include<iostream>
 8 #include<functional>
 9 using namespace std;
10 
11 /*
12 *    []()->{};  
13 *    [ capture list] ( params list) mutable exception attribute -> ret { body }
14 */  
15 int main()
16 {
17     auto sayHelloWorld = []() {
18         cout << "hello world" << endl;
19     };
20     sayHelloWorld();
21     auto add_ = [](int a,int b)->int {
22         return a + b;
23     };
24     cout<< add_(190, 10)<<endl;
25 
26     int i = 99;//read only
27     auto add_with_i = [i](int a, int b)->int {
28         return a + b + i;
29     };
30     cout << add_with_i(190,10)<<endl;
31     //
32 
33     int j = 100;
34     auto add_with_j_c = [&j](int a, int b)-> int{
35         j = 101;
36         return a + b + j;
37     };
38     cout << add_with_j_c(190, 10) << " j:" << j << endl; 
39     //
40 
41     vector<int> arr = { 1,2,3,4,5 };
42     int total = 0;
43     for_each(begin(arr), end(arr),
44         [&](int x)->int{
45         return total += x;
46     });
47     cout << "total:" << total << endl;
48     //
49     vector<int> sort_arr = { 2,-1,3,4,6,7,2,31 };
50     cout << "unsort : ";
51     for_each(begin(sort_arr),end(sort_arr),
52         [](int x) {
53         cout << x << " "; });
54     cout << endl;
55     sort(begin(sort_arr),end(sort_arr),
56         [](int a, int b)->bool {
57         return abs(a) < abs(b); });
58     cout << "sort   : ";
59     for_each(begin(sort_arr), end(sort_arr),
60         [](int x) {
61         cout << x << " "; });
62     cout << endl;
63     //
64 
65     auto func = [](function<void()> f) {
66         f();
67     };
68     int x = 100;
69     auto func_add = [&]() {
70         x++;
71     };
72     func(func_add);
73     cout << "x:" << x << endl;
74     getchar();
75     return 0;
76 }