for embedded development, because the programming language is CPP, but if you use C language style code to write code similar to strings and queues, it will inevitably be suspected of building wheels, and the code is not necessarily perfect, there will i...
does C CPP have a library that can generate pictures? can generate image data based on a description, and preferably export to a general picture format. ...
figure one by one becomes figure 2. I have been looking for it for a long time. In addition to using pictures, do you have any direct controls? ...
learn CPP, the code is an exercise of string substitution, in which the expression p = strstr (pdjm)! = NULL in the while loop will report an error at this point. if you change this sentence to ((p = strstr)! = NULL), there will be no problem if you e...
one way to resolve hash conflicts is called chain address, which is to string together value of the same key with a linked list. So, when you use these same key values, you get the linked list, but there are multiple values in the linked list, which valu...
has never used exception handling, so I am not clear about this. Recently, when I was working on a qt project, I considered adding this, but I simply wrote a program and found that -sharpinclude "mainwindow.h" -sharpinclude <QVBoxLayout>...
how to run the web service written by libmicrohttpd in the background? every time you put it in the background via nohup d_server, the browser request keeps turning as if it were stuck. ...
topic description in fact, there is no need to look at the title. Search UVa227 and you can see the title . sources of topics and their own ideas Puzzle, ACM ICPC World Finals 1993, UVa227 related codes Please paste the code text below (do ...
what is the process of the following code compiler? for more information, please see Code template<typename B, typename D> class is_base_and_derived { private: template<typename T> static int judge(D const *, T); static char judge(B c...
write Mini Game for the first time. ask: frame synchronization: the server broadcasts to the user at a frequency of 60 seconds. Or broadcast to other users as soon as you receive a user message? does bullet launch broadcast information about eac...
the website is http: www.ccgp.gov.cn cggg d.... collect the content of the red box, and at the same time have the details of the bidding (that is, the content after clicking the link), can you collect it? ...
problem description A few questions arise in the book C Primer Plus. The original text is roughly as follows: Bytes are commonly used in computers. For all machines, 1 byte is 8 bits, which is the standard definition of bytes, at least in terms of me...
I emplace a new custom class in the set container, in which there is a custom comparison function to sort, and then add two elements An and B in the container. I delete B, change the value of B, and re-emplace B, but validating the returned value will ...
MFC DLL contains a dialog box for an activeX control, which can be displayed normally when called in the export function of DLL. But delete the export function, directly call the dialog box in the initialization function of DLL, and then use EXE to load ...
linux cPP uses socket to simulate receiving http requests, and socket blocking does not set a timeout. When a get request for the same http is initiated with Firefox,chrome,IE under Windows or Linux, it only takes about 100 microseconds for recv to compl...
there are many articles on browser event loops, including main threads, task queues, micro tasks, and macro tasks. It s more or less the same! There is one thing I still don t understand: how exactly is the browser implemented? first! If an event oc...
The code for cPP looks like this. How can I use ffi to call the Login method? typedef struct _LoginInfo{ LoginAuthType authType; char *username; char *userPassword; char *appKey; char *appToken; char *timestamp; char *...
normally, the functions used in network programming are ssize_t read (int fd, void * buf, size_t nbyte) ssize_t write (int fd, const void * buf, size_t nbytes) to transmit byte by byte. but usually, a word in Chinese accounts for 2 to 3 bytes, so g...
t disconnected.Cannot connect file "C: Users suiwei Downloads day23-linux linux CentOS-6.4-i386-bin-DVD1.iso" as a CD-ROM image: Could not find the file...
1. When I created a member type of multiset for the class Basket, there was a problem specifying that the compare was constructed using multiset . 2. The program code is as follows: class Basket { private: static bool comp(const std::shared_ptr&l...
now there are such data structures, such as in the collection class. { _id:ObjectId123456789...), number:10, students:[ { studentId:ObjectId(123456789...) * studentid * }, ...
electron-vue, opens the server, of koa in the rederer thread and asks how to configure webpack to achieve hot loading of koa. currently, there is no modification to its own webpack template, which can realize the hot loading of Vue, but the port will ...
when php7.3 , laravel5.7 , mysql8.0 is installed on centos7.5, the following error occurs when running php artisan migrate : Illuminate Database QueryException : SQLSTATE[HY000] [2054] The server requested authentication method unknown to the...
how can this level be changed? ...
compile the scratch official source code, get the scratch.swf, to put it on the server and find the material library request error, will not configure, ask how to modify, you can correctly get the material library audio database and other materials ...