treehouse c# review

bytes that all characters occupy, including the ending character. 13. Character array output 13.1 characters-by-character input output:%c13.2 outputs the entire string:%s, at which point the output item should be a character array name instead of an array element. NBSP;13.3SCANF ("%s", c);//Enter a string into a defined array C to end the carriage return. 13.4scanf ("%s%s", c1,c2);//Enter more than one str

of a class. Why is there a struct? in order to represent some complex data, the common basic type does not meet the requirements. What is a struct? A struct is a composite data type that users define themselves according to their actual needs.#include #includestring.h>structStudent//defines a new data type{ intSID; Charname[ $]; intSage; }; //semicolons cannot saveintMainvoid){ //defines a data type that is a struct student variable St structStudent st = { +,"Zhangsan", -}; print

Review of inheritanceEffectively solve code redundancy, achieve polymorphism: Increase code scalability, ease of maintenance1, single-sex2, Transmission ofThe subclass does not inherit the constructor of the parent class, but instead calls the parent class's parameterless constructor by default classProgram {Static voidMain (string[] args) { } } Public classPerson {//Public Person ()//{ } PublicPerson (stringNameintAgeChargend

One months of study, the basic part is basically over, now began to strengthen the basic part of the review1. CommentsSingle line comment//Comment Line codeThe contents of a multiline comment/* Comment */Documentation comments///annotation classes and methodshtml2. Naming specification1), Camel Camel naming specification: first letter lowercase first words, the remaining words capitalized, variables, fieldsint age string Name char gender ... string hightschoolint _chinese (must be underlined in

ReadOnly is the second, dynamic constant. Then the difference can be explained by the characteristics of static constants and dynamic constants.1) const-modified constants must be initialized at the time of Declaration; readonly-Modified constants can be deferred to constructor initialization2) const-modified constants are parsed during compilation, that is, constant values are replaced with initialized values; readonly-Modified constants are deferred until run timeIn addition, const constants

classes———————————————————————————————————Private Members | Not accessible———————————————————————————————————Public Members | Protection———————————————————————————————————Protect Members | Protection———————————————————————————————————10, friend Yuan(1) Meaning of friend:Declaring an external function or a member function of another class in a classis a friend, this function can access the private data of this class(2) Statement of FriendDeclaring an external function fanction_name as a friend w

* array name [array length];• Note the difference from pointing to a two-dimensional array pointer:int (*p) [4]; ===> Pointer to a one-dimensional array containing 4 elements• Memory can be distinguished by the priority of the symbol, [] precedence is higher than *, pointer array [] is first combined, is an array, the element value is a pointer, a pointer to a two-dimensional array, * First combined, is a pointer, pointing to a one-dimensional array containing 4 elements; 2. Pointers to p

The definition array in the 1.C language is in the form of a type array name [constant expression], which can include constants and symbolic constants, such as "int a[3+5"; is legal. Cannot contain variables, such as "int a[n];" is not legal. In other words, the C language does not allow the size of the array to be dynamically defined, that is, the size of the arrays does not depend on the value of variable

segment three parts. Recursive forward when the boundary condition is not satisfied, and returns recursively when it is satisfied.17. Hanoi Tower problem: Can be solved by recursive and non-recursive, note that three pillars do not use the order of the limit, non-recursive can be used to simulate the process of the stack, the key is to divide the number of plates larger than 1 into 1 of the resolution steps.Input and Output section:18. Note that C +

container can store before it must allocate new storage space, capacity is always greater than or equal to size.Three, the comparison of the array and the vector1, in-memory locationThe array in C + + is the built-in data type, which is stored in the stack , and its memory allocation and release is done automatically by the system; vector, stored in the heap , by the STL Library program responsible for the allocation and release of memory, easy to us

characters.1-byte 8-bit, capable of storing 256 status values, also representing a capacity of 256 characters. If the first bit of the byte is the symbol, then the state value of the -127~+127 can be stored.In C, the definition of a character in the header file/usr/include/stdint.h, including the definition of the character type definition and the character rangeThe C language sample code is as follows:#in

Finding a good job makes your life happy. I want to start looking for a job. I will review C ++. Book: Essential C ++ (1) What are the consequences of not adding using namespace STD? Basicio. cpp: 24: Error: 'string' was not declared in this scopeBasicio. cpp: 26: Error: 'cout' was not declared in this scopeBasicio. cpp: 26: Error: 'endl' was not declared in t

) are not returned.Here, the unpacking process is over, but with the unboxing, the "often" (described in "CLR via C #", which uses "often", and does not say certain), immediately follows the copy of the field once.It's actually about copying the instance fields from the boxed object to the memory stack.A self-maintenance of the public number, the current article is not much, I hope the next day, will have been updated, write their own life, sharing te

solve the intermediate situation, and finally deduce the resultsWhile loopint i = 0;while (I {Console.WriteLine ("Hello");i++;}Do WhileRegardless of the expression after the time, you need to go through the first stepint a = 5;do{Console.WriteLine ("Hello");}while (A>10);Console.ReadLine (); function FormatFormat 1: No parameter no return public void Hanshu () {}Format 2: No parameter has return public int Hanshu () {return 1;}Format 3: The parameter is returned to public int Hanshu (int a) {re

value is: 0x100000+sizof (unsigned int) *0x1, equals 0x100004.The above question seems to have no technical content, the following is a technical content: under the x86 system, what is the value?Intmain (){int a[4]={1,2,3,4};int *ptr1= (int *) (a+1);//point to the memory cell behind the A array, a+1 means to move backward by 16 storage unitsint *ptr2= (int *) ((int) a+1);//The address of the storage unit of a adds one byteprintf ("%x,%x", PTR1[-1],*PTR2);//ptr1[-1] actually points to the last c

Big_endian//in real memory://0x12345678 Four bytes (equivalent to a ulong, int) in the 32bit CPU is stored in the following form://Big_endian:12 34 56 78 (High-order bytes are stored in the start address, low byte high address, high-byte low address)//little_endian:78 56 34 12 (the low-order byte is stored in the start address, low-byte lower address, high-byte address in high)intCheckcpu () {Union u {intA; Charb; C // xx xxC.A =1;//Example: If we

Started iOS learning because of OC, it is necessary to learn some basic concepts of C. There's a lot of stuff.It's basically a matter of programming.0. What does programming mean?By writing code, let the computer realize people's ideas. (Write code---> Compile Code---> Run program)1. Program three elements, order, select, Cycle.2. The statement constitutes a program, a statement, or an end.3. Use GCC to compile the

A grammatical basis1 Key WordsKeywords are basically at the beginning of the @, the common keywords are as follows:@interface, @implement, @end, @public, @private, @selector, @required, @encode, etc.Other Id,self,super, etc.2 string begins with @@ "Hello world!"3 Boolean type yes/no4 Null type nil (value 0)5 other C-language syntaxHelloWorld Program for two OCHelloworld.m#import The CC in MAC is used for clang compilation.Compile:Cc-

+ y;} , assigning a method to a delegate is, in fact, an anonymous method. classProgram {//STEP01: First define a delegate with delegate. Public Delegate intCaculateadd (intXinty); Static voidMain (string[] args) { //STEP02: Use this notation delegate (int x, int y) {return x + y;}, assign a method to the delegateCaculateadd ADD1 =Delegate(intXintY) {returnX +y;}; //int result = Cadd.invoke (5, 6); intresult = ADD1 (4,5); Console.WriteLine (result);

=locateelem (l,j);if(k)printf("%d element has a value of%d\n", k,j);Else printf("no element with value%d \ n", j); } k=listlength (L);/ * k for table length * / for(j=k+1; j>=k;j--) {i=listdelete (l,j,e);/ * Delete the first J data * / if(I==error)printf("Deletion of%d data failed \ n", j);Else printf("Delete element%d value is:%d\n", j,e); }printf("Output The elements of L in turn:"); Listtraverse (L); j=5; Listdelete (l,j,e);/ * Delete 5