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the difference between 1.sizeof and strlen#include #include int main (){Char a[10] = "12345";Char *p = "12345";Char b[20];printf ("%d%d\n", sizeof (a), strlen (a));/*sizeof is an operator,strlen is a function,andsizeof wants to add '/0 ',Strlen represents the length of the string, and the strlen parameter can only be ' char* ' * /printf ("%d%d\n", sizeof (*a), strlen (a));printf ("%d%d\n", sizeof (p), strlen (p));printf ("%d%d\n", sizeof (*P), strlen

. Database Design: User, role, permision, requiring one user to have multiple role and one role to have multiple Permissions Find all permissions of Michael Jacob. Find all users with more than 3 Permissions A: (I do not know the database permission. I will keep it for reference first) Answer 1: Select * From dba_tab_privs where grantee = 'zhang san '; Answer 2: Select P. priv from user_roles U, role_p

. principles to be followed during conversion1 ) The type of small capacity is automatically converted to a large type of capacity;2 when a large-capacity type is converted to a small capacity type, the conversion must be strengthened;3 ) byte, the Short,char does not convert to each other, and the three are first converted to the int type at the time of calculation;4 The real number constant defaults to the double type, and the integer constant defau

JavawebThe interview question, understanding is the most important, but not intact back downA. Please brief doget and Dopost the difference between them1) Get gets the data from the server and post is the data that is sent to the server.2) on the client side, the Get method submits the data through the URL, the data can be seen in the URL, the Post method, and the data is placed within the HTML header submission.3) for Get mode, the server side uses r

transactions, multiple concurrent transactions to be isolated from each other.persistence (Durability)Persistence refers to the fact that once a transaction is committed, it changes the data in the database to be permanent, and then it should not have any effect even if the database fails.2. data inconsistencies caused by common concurrency operationsIf there is no lock and multiple users access a database at the same time, problems may occur when th

end with. AExperiment: Create your own static library, contain two functions, and then call one of the functions in one of the sample programsStep 1: Create your own source files Fred.c and bill.c for each of the two functions, respectively:fred.c#includevoidint arg) { "fred:we passed% d\n", Arg);} Bill.c#includevoidchar* Arg) { "fred:we Passed%s\n", Arg);}Step 2: Compile these functions separately

1. Add the input box and label Levelscript:using Unityengine; using System.Collections; Public class Levelscript:monobehaviour { publicint experience; Public int level { getreturn; }}}LevelscripteditorNote: inOninspectorguiThe following code is added to the event to append the default properties: DrawDefaultInspector();sing unityengine;usingSystem.Collections;usingUnityeditor; [Customeditor (typeof(Levelscript))] Public cl

1. The above two div in the case of using pure CSS, keep in any size of the page is centered horizontally, vertically centered (the page size is not fixed). Center Horizontally, vertical center 2. How to achieve a layer in the browser vertically centered around?To center the Div horizontally and vertically, you must know the width and height of the div , then set the position to absolute position, and the d

, etc.)1 functionPrintoppo () {2 for(vari=10;i){3 varStr=i.tostring ();4 varIbegin=0;5 varIend=str.length-1;6 7 while(ibeginiend) {8 if(Str[ibegin] = =Str[iend]) {9flag=true;Tenibegin++; Oneiend--; A}Else{ -flag=false; - Break; the } - } - if(flag==true) - Console.log (i); + - } +}4. Use JavaS

Chapter One Welcome to Python world1 Python Features:Advanced interpretive language for system invocationObject orientedUpgradeable, extensible, portedAutomatic Memory Manager (memory management is the responsibility of the Python interpreter)2 installationWindows is installed only by downloading an installation package from the official web site and then stepping into the end, don't forget to tick "add to Path", or manually add the PATH environment v

ObjectiveThe following part of the topic from the network, the author gathered here, not only to consolidate themselves, but also hope to help the same needs of people! The reference answers are written by the author, there are questions or mistakes, please put in the comments, thank you! Don't like to spray!1. What is the difference between #import和 # include?Reference Answer:#importis Objective-C the syntax of the import header file, which guarantee

properties of the rice classmate car ..."); System.out.println ("The tire pressure of a classmate's car is normal. "); System.out.println ("The power system of a classmate's car is normal. "); System.out.println ("The safety system of a classmate's car is normal. "); System.out.println ("..."); }//Monitor the car starts to run up Public void Dorun(Easycarevent e) {Easycar p = e.getsource (); System.out.println ("Ah Rice classmate car start running ..."); System.out.p

Int a [5] = {1, 2, 3, 4, 5}; printf ("% d \ n", * (int *) ( a + 1)-2 );, printf % d What is the result of a certain convincing pen question in a certain year? The answer is 4. Why? My understanding (do not know if it is correct ): A is an array pointer of the int type [5

Question: a step has a total of n levels. If you can skip 1 level at a time, you can also skip 2 levels to find out the total number of hops in total and analyze the time complexity of the algorithm. Note: This question has frequently appeared recently. Companies that focus on algorithms, such as MicroStrategy, have chosen this question as an interview question or a pen