data structure involved in it, that is, the problems defined in the form of recursion, such as linked list, graph, and tree.
Now let's look at an example of a maze. The maze can be abstracted into a mathematical graph. Each intersection is a point, and the path between them is an edge. Two special points are defined as the entry and exit respectively.
The following are the points and diagrams defined in Javascript. Each vertex contains an id as the number and sign, and adjacent
1. Proves that there is a simple path between each pair of vertices of the connected undirected graph.Proof: Set U and V are two different vertices of the connected undirected graph G = (V, E), because G is connected, so there is at least one path between U and V. Set x0, x1, x2, ..., xn is the vertex sequence of the shortest path in length, where x0 = u and xn = v. This shortest path is simple. To see this
Command action a toggle a bootable flag B edit bsd disklabel c toggle the dos compatibility flag d dele Te a partition l list known partition types m print this menu n add a new partition o create a new empty DOS partition table p print the partition table q quit without saving changes s create a new empty sun disklabel t change a partition's system id u change display/entry units v verify the partition table w write table to disk and exit x extra functionality (experts only) command (m for hel
; setvalue (near, 1); camera1-> setvalue (far, 20); camera1-> setvalue (yangle, 50); // nodes for Robot: material * robotmat = new material; Material * eyemat = new material; cylinder * base = new cylinder; sphere * head = new sphere; sphere * eyel = new sphere; sphere * eyer = new sphere; cylinder * upperarml = new cylinder
Chapter 11: Measurement: two-and three-dimensional figuresCircumferenceCylinderPyramidVolume
11-1: Area of parallelogramsBaseHeightThe area A of a parallelogram equals the product of its base B and height H.
11-2: triangles and trapezoidsPerpendicular lines: lines that intersect at right angles.Area of a trapezoidArea of a triangle
11-3: circles and circumferenceCircleCenterDiameterCircumferenceRadiusπ (PI)A circle is the set of all points in a plane that are the same distance froma given point,
interpolation between the texture coordinates of each polygon vertex to determine the texture pixels used on each pixel of the polygon. Generally, the system regards the texture as A two-dimensional plane, and interpolation is performed on the line between two points A and B in the plane. If the U and V coordinates of vertex A are (0.8, 0.3) and point B is (0.1,. 9), the line for interpolation is shown in:
Note that the shortest line at the points A and B passes through the middle part of the
Print? /* Copyright (c) 2012, computer College, Yantai University* All rights reserved.* File name: text. cpp* Author: Hu Ying* Completion date: January 1, May 20, 2013* Version No.: v1.0** Input Description: None* Problem description: (1) create a Point class, which includes data members x and y (coordinate Point); (2) base class with Point, A Circle class is derived, and the data member (RADIUS) is added. (3) A Cylinder class is derived from the Cir
bootable flag B edit bsd disklabel c toggle the dos compatibility flag d dele Te a partition l list known partition types m print this menu n add a new partition o create a new empty DOS partition table p print the partition table q quit without saving changes s create a new empty sun disklabel t change a partition's system id u change display/entry units v verify the partition table w write table to disk and exit x extra functionality (experts only) command (m for help): n- -Add the new partit
When people use a computer, sometimes because of abnormal operation, sometimes because of virus attack, can cause a partition to disappear or hard drive cannot start. The reason is that the hard disk partition table is damaged. The hard disk partition table can be said to support the hard disk normal work skeleton. It is the operating system that divides the hard disk into partitions, and then creates the file system in each partition and writes the data file. This article is mainly about the lo
extended partitions)Extended partition capacity = total capacity of logical partitionsThrough the above example, we can know that hda = hda1 + hda2 + hda3, where hda3 = hda5 + hda6 + hda7 + hda8 + hda9 + hda10 ......
2. Description of some fdisk-L values;
Disk /dev/hda: 80.0 GB, 80026361856 bytes255 heads, 63 sectors/track, 9729 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes
The hard disk is 80 GB, with 255 magnetic surfaces; 63 sectors; 9729 magnetic columns; the capacity of each
following are the points and diagrams defined in Javascript. Each vertex contains an id as the number and sign, and adjacent vertices are saved in an array. The figure shows a method for adding vertices, a more convenient method for directly adding vertex IDs, and a method for adding edges.
[Javascript]// Define a vertexFunction Vertex (id ){Var stem = {};Stem. id = id;Stem. adjacent = [];Return stem;}// D
ProfileIn the previous tutorial, we built a minimal Direct3D 11 application that was used to output a single color on a window. In this tutorial, we will extend the application to render a single-color triangle on the screen. We'll associate the triangle with the process of setting up the data mechanism.The output of this tutorial is to render a triangle in the center of the window.Resource Directory(SDK root) \samples\c++\direct3d11\tutorials\tutorial02Github-learndirectx-dx3d11 tutorial02 (sou
Here is a detailed explanation of how the Drawtriangles function is used. and use the Drawtriangles function to achieve the following processing effectBecause this method is transplanted from AS3, so its use and AS3 basically consistent, here is AS3 Drawtriangles function API, we can refer toHttp://help.adobe.com/zh_CN/FlashPlatform/reference/actionscript/3/flash/display/Graphics.html#drawTriangles ()Last time also explained, after the transplanted drawtriangles function, the meaning of the pa
15.2.4 Tyre Modeling
Starting with the tire modeling, the tires are divided into 2 parts of tires and tyres, respectively, modeled, and finally merged together.
1. Wheel Frame Modeling
Hide the "body" and start Modeling "tires".
Build a cylinder in the position of "tyre". Set the parameter and rotate it 15 degrees, as shown in Figure 15-187.
Build a tubular body, set the parameters, and rotate it 10 degrees. Align the center of the two objects
contour is clear, the surface is smooth, and the mechanical properties are high, especially for the casting of Large Thin-walled parts;
The metal utilization rate is increased to 90% ~ 98%;
Low labor intensity, good labor conditions, simple equipment, easy to achieve mechanization and automation.
Disadvantages and limitations:
The lifting pipe has a short life, and the metal liquid is prone to oxidation and slag inclusion during the thermal insulation process. It is mainly used to cast alumi
logically divided into tracks, cylinders, and sectors.
Figure 3 track, cylinder, and sector
Each disk has a read/write head on each side of the hard disk.
Figure 4 Disk Area Division
The head is close to the contact surface of the main shaft, that is, the place with the smallest wire speed. It is a special area that does not store any data. It is called the start/stop area or the landing area (landing ).Zone. In the outermost ring, the farthest place
Cocos2dx standalone Mahjong (III)
Mahjong logic 4. Obtain card data
We have saved a one-dimensional array. Similar to a table, we can calculate the number of all cards, but how can we get the cards in our hands?
// Poker Conversion
Byte switchtocarddata (byte cbcardindex [max_index]/* input table for counting the number of all cards */, byte cbcarddata [max_count]/* outgoing hand card data */)
{
// Convert poker
Byte cbposition = 0;
For (byte I = 0; I
{
If (cbcardindex [I]! = 0)
{
For (byte J
partition, so that the operating system Mount recognition.Type: nCommand N to add a new partition4), at this point,fdisk will let you choose to add the logical partition (numbering starting from 5) or the primary partition (numbers 1 to 4). Select the primary partition, type P, and select logical partition to Type L. We select the primary partition so that:Type: pSelect Create Primary partition5), at this time,fdisk will let you select the primary partition number, if you already have the prima
magnetic surface.
3. Cylindrical surface (Cylinder)
Concentric tracks with the same radius in the disc are called cylinders, which are the same set of tracks with the same number (position) on each disk, as shown in the figure. When the logical disk capacity of the hard disk is divided, the number of the cylindrical surface is usually not used.
The cylinder begins with the outermost
we do not search during access. As long as we say the address and access it right away, linear storage has a search process, telling which cylinder, slice, and track, the data can be accessed only after the motor is rotated. The CPU can only access random memory. Therefore, the memory must be random memory, and the optical disks and hard disks must all belong to linear storage and can only be used for external storage, currently, the popular flash di
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