Dport and sport in iptables first translate dport and sport meaning: dport: Destination Port sport: Source Port beginner iptables is easy to confuse, but I try to explain it to you in plain language. Dport and sport are literally easy to understand. One is the destination port for data arrival and the other is the port
1313. Some words about sporttime limit: 0.5 second
Memory limit: 16 MB
Ural doctors worry about the health of their youth very much. Special Investors showed that a lot of clever students instead of playing football, skating
Or bicycling had particle ipated in something like programming Olympus. Moreover, they call it sports programming! To sit near the monitor and think during 5 hours a day-is it a sport? To do it two times per year during the contes
Analysis of dport and sport in iptables
First, let's talk about the concepts of dport and sport:
Dport -------- destination port
Sport -------- Source Port
It is important to note that it is related to the flow behavior of our data packets, that is, the INPUT or OUTPUT.
For example, iptables-a input-p tcp -- dport 80-j ACCEPT here is the INPUT parameter,
Analysis of dport and sport and iptablesdport in iptables
First, let's talk about the concepts of dport and sport:
Dport -------- destination port
Sport -------- Source Port
It is important to note that it is related to the flow behavior of our data packets, that is, the INPUT or OUTPUT.
For example, iptables-a input-p tcp -- dport 80-j ACCEPT here is the INPUT
()Getvisibleorigin (); -width_l =origin.x; -Width_r = origin.x +Visiblesize.width; the -Ball =drawnode::create (); -Ball--Drawdot (VEC2 (0,0),4, color4f (1.0f,1.0f,1.0f,1.0f)); - + addChild (ball); -Ball--SetPosition (origin.x + visiblesize.width/2, ORIGIN.Y + visiblesize.height/2); + A //action-related motion we are generally not used to do game games, generally used to make the game change effect. Because the action is not very good to show the effect of the game at //dot-r
As a result, if I did not dance in the evening after work, I went swimming in the company's swimming pool. I finally went swimming with my father in the nearby Yucheng gongshu swimming pool. I have been swimming frog for a long time, and I have also used it to swim through sun and moon pools. But in reality, I do not like swimming very much because swimming is a kind of human activity, compared with those sports of the ball, it is really boring. I will go swimming again recently. First, I want t
In practice, the vector series in c ++ -- creating vector of local structure AND vector of structs initialization
I have never used it beforeVector
Now, write a short code:
#include
#include
int main() { struct st { int a; }; std::vector
v; v.resize(4); for (std::
I've never used it before.vector#include #include intMain () {structSt {intA };STD:: vectorV V.resize (4); for(STD:: vector:: Size_type i =0; I operator[] (i). A = i +1;//v[i].a = i+1;} for(inti =0; I STD::coutSTD:: Endl; }}Compile successfully with VS2015, run result:1234However, this is only allowed after c++11, the compiler does not allow you to write such a syntax, the vector container is not allowed to
Linear correlation of the first section vector group
A Mathematical Concepts
Defines 1.1 n ordered numbers, the array of which is called an n-dimensional vector, which is called n components of the vector, and the number I is called the first component.
Definition 1. 2 to the directional measure group A:, for any set of real numbers, vectors
A linear combination
Summary of several situations of vector vectors in c ++ (vector pointer and pointer vector)
1. Standard Library vector type
Vector is a set of objects of the same type. Each object has a corresponding integer index value. The standard library will be responsible for managing
Vectors are vector types that can hold many types of data, such as several integers, so they are called containers. Vector is an important member of the C + + STL, and you need to include the header file when you use it:
Copy Code code as follows:
#include
Vector initialization: There are five ways to do this, examples are as follows:
(1)
In practice, the vector series in c ++ -- vector (unique_ptr () is assigned to vector (unique_ptr ())
Previously, we mentioned that the insert method can be used to copy a vector to the end of another vector.
As mentioned in previous blogs, if unique_ptr is placed inside the
In three-dimensional space, the product of two vectors (a vector product, an outer product, a product, a multiplication of multiples of two vectors: the inner product, the dot product) represents the torque of two vectors, and the mixed product axb of three vectors C, the area of the parallelepiped that is composed of three vector a,b,c. And the position of a,b,c in the mixed product is interchangeable (thi
C ++ copies the content in a vector to the end of another vector and ends with the vector.
When using the vector container, We need to copy the content of a vector to the end of another vector. How can this problem be achieved?
In practice, the vector series in c ++ -- vector traversal (stl algorithm, vector iterator (do not judge not equal to end () in the loop), operator [])
There are many ways to traverse a vector container.
Index traversal:
for (i = 0; i
Iterator traversal:
for (vInt::const_iterator iter = v.begin(); iter != v.end();it
See C++primer Plus look bored, the first time do Leetcode practice, originally want to do two-dimensional vector, results always pass, check the reason, must use one-dimensional ...One-dimensional answers:Class Solution {PublicVector{int cout = Nums.size (); Get the size of the vectorvectorfor (int i = 0; i{for (int j = i + 1; j{if ((Nums[i] + nums[j]) = = target){Ret.push_back (i); Get the location of the target valueRet.push_back (j);}}}return ret;}
Previous blogs about vectors you can use the Insert method to copy a vector to the back of another vector.Previous blogs have also talked about the need to transfer ownership if the vector container is placed inside the unique_ptr.Come on, now. 818 HowvectorIf you have a regular vector, we can use insert like this://inserting into a
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