how to understand this line of code? static void * a = &a; I saw it on the source code of AFN. static void *AFHTTPRequestSerializerObserverContext = &AFHTTPRequestSerializerObserverContext; The AFURLRequestSerialization.h file is used wh...
is a parser, implementation of a MIDI file. A class, can read the midi and then manipulate the notes or tracks (adjust the length of the force or delete insert the pregnant woman), and then export the midi. No suitable one has been found at present. T...
A simple interface program that accepts username and password, slot function is temporarily empty, compilation can pass, runtime error. passwddialog.h -sharpifndef PASSWDDIALOG_H -sharpdefine PASSWDDIALOG_H -sharpinclude <QDialog> class QLabe...
the original rule is as follows [1-9] {1} [0-9] {3} now I want to rule out the result of 2035. How do I write it? because I m in a hurry, I can t think for myself. Regularity is my weakness. Thank you! ...
when I read a book, I write the following code and type . -sharpinclude<stdio.h> -sharpinclude<stdlib.h> *acb* void butler(void); int main() { printf("a"); a butler(); void butler printf("b"); b return 0; ...
I was bored on the subway. I wanted to write code. I wanted to find a code editor like webstorm. then I searched for a long time, but I couldn t find a suitable one. I just found a codeanywhere, because I haven t experienced it yet, but I still want ...
1. As shown in the figure, class b inherits class a, and the constructor of class b calls the constructor of a. The error of redefinition of formal parameter I appears where the arrow is hit 2.a(i)b ...
when I see the conditional variables section of CPP11, I find that all conditional variables are used in conjunction with locks, but at this time they all use unique_lock instead of lock_guard,. Can you explain that? ...
for example, if there is a set of numbers such as 1, 2, 5, 7, 11, 14, how can Filter come up with two sets of numbers: [1, 2] and [5, 6, 7, 7]? ask for advice ...
in MFC development, how to switch tabControl pages with a button? for example, in C-sharp, you can click the button to switch pages by adding the following statement to the button: this.tabControl1.SelectedIndex = 2; but only these two attributes ...
in MFC development, how to change the picture content of pictureBox by clicking a button? this property in pictureBOX: how to add code to the button to make pictureBOX load another picture when you click the button, thank you! ...
< H1 > include < iostream > < H1 > < H1 > include < time.h > < H1 > < H1 > include < stdlib.h > < H1 > < H1 > include < math.h > < H1 > using namespace std; problem: partition function does not work effectively; typedef double Type; typed...
QDateTime valid = QDateTime::fromString("2018-Apr-5", "yyyy-MMM-d"); use qDebug () output valid to directly say that it is invalid, what is this all about? It is not valid to use an example in the official document: QString s...
CPP11 allows list initialization for all objects, and because the constructor body is assigned, references and const variables must be initialized first, so you must use list initialization, so how is it initialized before CPP11? ...
cut the rope, cut the rope of length n into m segments, and find the maximum value of the length product of each segment I would like to ask myself what is the idea of typing n and m ....
platform: windows10 after I use the start function of QProcess to execute the local (current directory) python file, I can t get standard output from readAllStandardOutput. Code of python file: print "hello,world " Qt Code: -sharpinclude <QP...
this is an algorithm for calculating palindromes less than 100,000 primes written with CPP . -sharpinclude <iostream> using namespace std; int main() { int input_num=100000; int pp_count=0; for(int each=2; each<=input_num; eachPP)...
whether the data transmitted by socket needs to be encrypted ...
I did a question on leetcode, but for the string type, the push_back concatenation character failed the test, but changed to the plus sign to concatenate the character and passed it. topic link my two codes: class Solution { public: vector<...
here is the log at startup 2018-04-17 06:13:59 InitParameterInteraction: parameter interaction: -connect set -> setting -dnsseed=0 2018-04-17 06:13:59 InitParameterInteraction: parameter interaction: -whitelistforcerelay=1 -> setting -whitelistre...
function Foo(){ bar=function(){console.log(1)}; return this; } Foo.bar=function(){console.log(2)} Foo.prototype.bar=function(){console.log(3)}; var bar = function(){console.log(4)} function bar(){ console.log(5); } new bar(); Foo.bar(); F...
how to implement whois mailbox and registrant counter-check by PHP has a boss ever done it? give me some advice. Thank you! ...
-sharp-sharp-sharp js:export default { data () { }, methods: { }} what result do you expect? What is the error message actually seen? to make such an effect, you can only make two input boxes, hoping to give an explanation . ...
upload the file manually. Report Provisional headers are shown in the header. After uploading to Qiniuyun, get the file again and upload it to another server. as shown in the picture: [Picture] does any hero know how to solve this problem? ...
according to uib document rating to achieve a simple star score, how to count the total score when there are multiple rating on the page? html: js: :uib-rating ...