目录
lambda表达式
- 也就是匿名函数,我们可以在全局区、函数内、就像声明变量一样来声明一个函数出来用,而普通函数并不能在函数内声明。
- 示例:
int main() {
// 声明
auto fun = []() {
cout << 123 << endl;
};
// 调用
fun();
return 0;
}
递归
- 对于普通函数,递归调用很简单,我们可以在函数内直接调用函数自己。
int hello(int value) {
if(value < 0) {
return 0;
}
cout << value << endl;
hello(value - 1);
}
lambda递归
- 对于 lambda 实现递归,由于它是匿名函数,本身没有函数名,我们是把他赋值给了一个变量。
- 但要注意的是,像下面这样直接调用是不行的:
- 因为在 声明lambda表达式时,变量fun应当视为还没声明,fun需要等lambda表达式构造完成后赋值过来才算完成声明,因此在 lambda 内是不能访问 fun 这个变量的。
int main() {
auto fun = [&fun](int value) {
if(value < 0) {
return;
}
cout << value << endl;
// 这里是不行的!!!
fun(value - 1);
};
fun(10);
return 0;
}
- 既然如此,我们可以在lambda表达式前先声明一个 “容器”,让它去保存lambda,并且在声明 lambda时,由于这个容器是之前声明好的,因此可以引用捕获它,然后在 lambda内取到自己调用即可:
#include <iostream>
#include <functional>
using namespace std;
int main() {
int i = 10;
std::function<void()> myfun;
myfun = [&myfun, &i]() {
if (i < 0) {
return;
}
cout << i << endl;
--i;
myfun();
};
myfun();
return 0;
}
ed meds online without doctor prescription https://indianpharmdelivery.com/# reputable indian online pharmacy
reputable mexican pharmacies online purple pharmacy mexico price list mexican drugstore online
viagra without a doctor prescription https://indianpharmdelivery.com/# indianpharmacy com
tadalafil without a doctor’s prescription: ed remedies – cheap medication online
It’s slightly bit simplistic to say ‘Oh nicely, they can be labored by way of,’ there really are some fairly strong tensions there, however it’s fairly a popular notion right here right now, the idea that more authorities cash ought to be going to religious teams.
HSBC will not be solely the largest financial institution in Europe, but additionally the seventh-largest in the whole world!
Monte Cristo in the identical language.
Each on-line transaction you make with participating merchants using your USAA debit card is backed by Visa Secure®.
https://indianpharmdelivery.com/# india online pharmacy
buy medicines online in india
pharmacies in mexico that ship to usa mexican online pharmacies prescription drugs mexican pharmaceuticals online
Сервисный центр предлагает ремонт бесперебойника powerex на дому ремонт бесперебойника powerex в москве
Virtually 75,000 top officers across eight industries worldwide strategy MarketsandMarkets for his or her painpoints round revenues selections.
You can add the Italian Tattoo Design to your collection of tattoos which you can also make once you journey to every nation.
Steven Waldman: Properly he does not seem to be notably apprehensive about that.
mexico drug stores pharmacies: reputable mexican pharmacies online – mexico drug stores pharmacies
Instances continued to increase with a 150 spike in instances close to the tip of September.
Ki-hoo, Hwang (director); Anna Craig and Danny Ducker (storyboard) (September 21, 2018).
Everything is very open with a very clear description of the issues. It was definitely informative. Your site is useful. Many thanks for sharing!
Fireless cookers can lower vitality use by greater than 80, however the precise savings potential relies on many elements.
The major emitters should step up with much more ambitious emissions reductions targets for 2030 in their Nationally Determined Contributions well before the November (2021) UN Climate Conference.
The young and younger-at-coronary heart can’t resist a theme park trip.
From Ford of Canada got here the hunch-backed North American V-8 sedans, adopted in 1949 by the extra fashionable spinner-nostril Custom sedans that had been the primary Fords to have a coil-and-wishbone entrance suspension, however retained the “flathead” V-eight engine.
These items have wonderful critiques, great appliances, and are straightforward to tow.
indian pharmacies safe top 10 online pharmacy in india indian pharmacy online
From its base in Freiberg it has nearly 80-years’ experience as a control, supervising and certifying body and as an engineering organisation for hearth safety projects.
Time/temperature curve used for testing the hearth-resistance rating of passive fireplace safety systems in Europe.
Сервисный центр предлагает срочный ремонт варочной панели aeg выездной ремонт варочных панелей aeg
http://drugs24.pro/# prescription drugs
Online medicine home delivery
There is certainly a great deal to learn about this topic. I like all of the points you’ve made.
herbal ed: buy prescription drugs from india – male dysfunction treatment
Профессиональный сервисный центр по ремонту сотовых телефонов в Москве.
Мы предлагаем: ближайший сервисный центр по ремонту телефонов
Наши мастера оперативно устранят неисправности вашего устройства в сервисе или с выездом на дом!
pills for ed: how to overcome ed – best ed pills
mexican border pharmacies shipping to usa п»їbest mexican online pharmacies buying from online mexican pharmacy
Online medicine order: online pharmacy india – buy medicines online in india
Pretty! This was an incredibly wonderful post. Thanks for supplying these details.
mail order pharmacy india online shopping pharmacy india india pharmacy
Сервисный центр предлагает починка кофемашин leben ремонт кофемашины leben на дому
https://mexicanpharm24.pro/# п»їbest mexican online pharmacies
indian pharmacy online
One such fabricated beam consists of an H part (usually UC) with a welded backside plate – this is commonly called a ‘Slim ground beam’.
Shulk’s Monado-unique arts have advanced and intermediate arts manuals outlined for them, with each one named “Superior/Intermediate Arts Guide – Shulk” and numbered one by means of eight.
So, let the fun begin with potato sack races, relay races, and visitors performing somersaults to resemble Sonic’s tremendous pace roll.
12 months round guiding and teaching.
Infrastructure development applies to all fixed and everlasting installations, fabrications, or services that help and control military forces.
On the Turkish Grand Prix, Schumacher qualified fifth and finished fourth within the race, each his best results since his return.
2017. PMID: 29107466 No abstract obtainable.
I blog frequently and I seriously thank you for your information. Your article has really peaked my interest. I’m going to bookmark your site and keep checking for new information about once a week. I subscribed to your Feed as well.
In many circumstances, the various tested firestop techniques are not relevant to specific subject circumstances.
The time value of that work, the calories expended, the human drudgery, seem to me to be on a par with the web effectivity of an electric energy grid.
Conversion efficiencies do put electricity at a drawback, but co-gen and community energy can carry it again in line.
This Italian Tattoo Design is ideal just for that.