treehouse c# review

CONVERTCSCW The error message in the XMLTC method "+ Environment.NewLine + ex. ToString ()); Return ""; }　　 XDocument format goto XmlDocument public XmlDocument toxmldocument (XDocument XDocument) { var XmlDocument = new XmlDocument (); using (var XmlReader = Xdocument.createreader ()) { xmldocument.load (xmlReader); } return xmlDocument; }　XmlDocument XML = new XmlDocumen

non-recursive DFS and BFS, the difference is that a list is required to flag which nodes have been accessed to avoid loops. //2. Topological sequencing (direction graph), the degree of gradual pruning of the idea, can be used to check whether the graph has a ring (the graph is always minus the degree of 1), check whether it is fully connected or there are several Unicom sub-mapvectorint> topolist=Toposort (graph); //3. Shortest path Dijkstra The algorithm requires that no negative weights exist

C # compile a review of the automatic shutdown ProgramFirst, the first element of a program is that you can set the program ICON in the settings of the logo and set it in the ICON. The ICON can be downloaded from the Internet. These are the Button controls of the Buton, Label, Timer, and Notiflcon controls involved in the surface kung fu program. You can design the click events as follows: Private void time

C # object-oriented review> 2015.12.23, First, we need to know the three features of object-oriented Encapsulation In program development, it can be understood as method encapsulation of Common Code, class encapsulation of common methods. The benefits of doing so are: First, reduce code redundancy and make the code more organized. Second, you do not need to know how the method is implemented at t

of the current loop, and does not jump out of all loops.Notice the nesting relationship in the loop, which is the problem of design to complexityFrequently-given examples:Find the prime, change, sum, greatest common divisor, inverse numberSummarize:1, the structure of the basic program2, the structure between the characteristics and continuous, their difficulty between the increment, the use of the scene.Here is a picture of the design to the knowledge point: Copyright NOTICE: This article for

: When a derived class contains an object member , how should its constructor be constructed?When an object member is contained in a derived class, the general form of its constructor is:Derived class name (parameter summary table): base class name (parameter table 0), Object name member 1 (parameter Table 1), ..., object member name n (parameter table N){Initialization statements for new members of derived classes:}ThatWhen defining a derived class object, the constructor executes in the follow

#include using namespacestd;voidShellsort (int*a,intLen) { intGap; for(gap=3;gap>0; gap--) { for(intI=0; i) for(intj=i+gap;jGap) { if(a[j]Gap]) { inttemp=A[j]; intk=j-Gap; while(k>=0a[k]>temp) {A[k+gap]=A[k]; K=k-Gap; } a[k+gap]=temp; } } }}intMain () {intn=5; inta[Ten]; for(intI=0; i) {cin>>A[i]; } shellsort (A,n); for(intj=0; j) {cout" "; }}Interview Review (

#include using namespacestd;voidQuicksort (int*a,intLowintHigh ) { if(low>High ) { return; } intI=Low ; intj=High ; intkey=A[i]; while(ij) { while(ikey) {J--; } A[i]=A[j]; while(ikey) {i++; } A[j]=A[i]; } A[i]=key; Quicksort (A,low,i-1); Quicksort (A,i+1, high);}intMain () {intn=5; inta[Ten]; for(intI=0; i) {cin>>A[i]; } Quicksort (A,0, N); for(intj=0; j) {cout" "; } return 0;}Quick sort of Interview review (

Preparations before the interview --- C # knowledge Review ---- 04, As soon as the seeds were planted, they began to sprout and reap the harvest. It was time for me to pick them up. A company interviewed today has a wide range of technical questions and is extremely meticulous. 1. Talk about ViewState This is a good answer, with a higher salary. What is it, I will not elaborate on the specific things.

() {console. Writeline ( }} /span> The Interfaceimplementer class implements the IMyInterface interface, and the implementation of the interface is similar to the class's inherited syntax format:Classinterfaceimplementer:imyinterface After inheriting the interface, we need to implement the method Methodtoimplement () of the interface, and the method name must match the method name defined by the interface.Interface Inheritance: InterfaceInheritance.csThe following example

;} protected internal string address {Get; set ;} protected void display () {console. writeline (string. format ("Name: {0}, age: {1}, address: {2}", name, age, address = string. empty? "No value assigned or no access permission. ": Address) ;}} class student: person {static void main (string [] ARGs) {student _ Xiaoming = new student (); _ Xiaoming. name = "Yan"; _ Xiaoming. age = 1; _ Xiaoming. address = "Shanghai"; _ Xiaoming. display ();}}} Note the yellow background code; 3.2 Create a sec

an exponential portion, such as 123.456 or 123e-2. The return value returns the number of converted floating-point types.4. atol (Convert string to growth integer)Define function: Long atol (const char* PTR);Function Description: Atol () scans the parameter PTR string, skips the preceding space character until it encounters a number or sign.Starts the conversion, and then encounters a non-numeric or string ending (' + ') before ending the conversion and returning the result.5. GCVT (Converts a

#define_crt_secure_no_warnings#include#include#include#defineMAX 8intMain () {intA[max][max] = {0 }; for(inti =0; i ) {a[i][0] =1; A[i][i]=1; if(i>=2) for(intj =1; J ) A[i][j]= A[i-1][j-1] + a[i-1][j]; } for(inti =0; i ) { for(intj =0; J ) if(A[i][j]! =0) printf ("%5d", A[i][j]); printf ("\ n"); } System ("Pause"); return 0;}C Language Review---Yang Hui triangle printi

#include #include using namespace Std;Template T Add (t one, T){cout return one + one; Function templates are compiled only when they are called, and some compilers compile at first compile time}int add (int one, int){cout return one + one;}Template void Show (T T, F F){F (t);}void Show_ (int temp){cout }TemplateAuto Temp1 (T1 t1, T2 T2)->decltype (T1+T2)//automatic type inference{return t1 + T2;}Templatevoid Temp2 (T t){Decltype (t) D; Create a variable of the same type as T}int main (){cout co

Tempa ();Auto TEMPB = [] () {temp1 = Temp2; cout TEMPB ();Auto TEMPC = [temp1, Temp2] () {Temp1 = $; cout TEMPC ();Auto TEMPD = [=] () mutable{temp1 = Temp2 = ten cout /*Lambda expressions allow functions to be defined again within a function (anonymous functions), and lambda expressions are useful for traversing data structures.*/Example four: Accessing an array with a lambda expressionint arr1[5] = {1, 2, 3, 4, 5};For_each (arr1, arr1 + 5, [] (int num) {cout ArrayFor_each (Arr2.begin (), Arr2

When a member function in a class involves two objects, it is necessary to use the this pointer;　　Each member function, including the construct and destructor, has a this pointer. The this pointer points to the calling object, and if you need to reference the entire calling object, you can use the expression *this (dereference);Add the const qualifier after the function brackets, limit this to const, and disallow the object's value to be modified by this.Summary

class has a virtual decoration before the method with the same name. In this way, polymorphism can be achieved. Polymorphism refers to the coexistence of different methods with the same name in a program. There are two forms of polymorphism – overloading and rewriting.4. (simple answer) the difference between a value type and a reference type.Variables of value types themselves include their data, while variables of reference types include blocks of memory that refer to dataRefers to or is call

contain 1. Suppose that an integer is stored in one byte (8 bits), and if A is an unsigned integer variable, then when the a=64 is shifted to the left one when the overflow is 0, and the left 2 bits, the overflow high position contains 1.6. Right shift operator (>>)The right-shift operator is used to move the bits of a number to the right of a number of bits, the number of bits moved is specified by the right operand (the right operand must be non-negative ), the low end of the right side is di

1, identifiers are divided into three categories: keywords, predefined identifiers, user identifiers. Keywords have a special effect in C, so you can't use them like int, print, and so on. A predefined identifier is a pre-defined identifier that has a special meaning and cannot be used as a include,define, for example. A user identifier is a user-defined identifier that has the same naming rules and keywords, consisting of letters, numbers, and unders

(1) When an array is passed as an argument to a function, the array is automatically degraded to a pointer of the same type. So pay attention to the sizeof operator inside the function.(2) Print out the current source file name and the current line number of the source file: cout (3) How to determine if a program is compiled by C compiler or C + + compiler?#ifdef __cplusplus "