loops

问题 This question already has answers here : How to compile a C project in C99 mode? (4 answers) Closed 4 years ago . I am getting the below error, what is std=c99/std=gnu99 mode? source Code: #include <stdio.h> void funct(int[5]); int main() { int Arr[5]={1,2,3,4,5}; funct(Arr); for(int j=0;j<5;j++) printf("%d",Arr[j]); } void funct(int p[5]) { int i,j; for(i=6,j=0;i<11;i++,j++) p[j]=i; } Error Message: hello.c: In function ‘main’: hello.c:11:2: error: ‘for’ loop initial declarations are only

问题 This question already has answers here : How to compile a C project in C99 mode? (4 answers) Closed 4 years ago . I am getting the below error, what is std=c99/std=gnu99 mode? source Code: #include <stdio.h> void funct(int[5]); int main() { int Arr[5]={1,2,3,4,5}; funct(Arr); for(int j=0;j<5;j++) printf("%d",Arr[j]); } void funct(int p[5]) { int i,j; for(i=6,j=0;i<11;i++,j++) p[j]=i; } Error Message: hello.c: In function ‘main’: hello.c:11:2: error: ‘for’ loop initial declarations are only

问题 Can anyone explain why the answers are what they are please? The first one i guess its because the stopping condition is already reached so it skips the statement but question 13 why would it not print 4321? 12.What output is produced by the following code: int n; for (n = 1; n > 4; n++) System.out.print(n); a) 12345 b) 1234 c) 0 ---> for loop never runs because stopping condition already met. d) It produces no output* 13.What output is produced by the following code: int n; for (n = 4; n > 0

问题 I'm working on web-scraping Google search with a list of keywords. The nested For loop for scraping a single page works well. However, the other for loop searching keywords in the list does not work as I intended to which scrap the data for each searching result. The results didn't get the search outcome of the first two keywords, but it got only the result of the last keyword. Here is the code: browser = webdriver.Chrome(r"C:\...\chromedriver.exe") df = pd.DataFrame(columns = ['ceo', 'value'

问题 Im having a problem incrementing a counter in one of my while loops basically i just want to alternate between two image links that were fetched in my database but my counter wont increase and im not sure why can anyone help? while($row = $stmt->fetch(PDO::FETCH_ASSOC)) { $img_link = $row['Image']; $img_link_alt = $row['Image_alt']; $i = 0; echo '<div class="col-xs-6 col-sm-3 placeholder">'; $img = ( $i % 2 == 0 ) ? $img_link : $img_link_alt; echo $i; //'?' . date("h:i:sa").' echo '<img style

问题 I have a div, when I clicked on it, should turn all the elements in the .counter class to red, but at the moment it does nothing. I believe you have to run through a loop first and then use this somehow to select all elements in the class width JS? CSS .counter { width: 100px; height:100px; background-color:orange; } #btn { background-color:aqua; width:50px; height:50px; position:absolute; left:200px; top:10px; } HTML <div class="counter"></div> <br> <div class="counter"></div> <br> <div

问题 Below is the code I am currently running. I am trying to make a text based version of the arcade game Tron. I want the game to run automatically unless the user enters a direction (WASD). I have looked into timers and I know that if I were to use swing I could implement action listeners but this project is to be done strictly without a GUI. I was wondering if anyone might have some ideas how to make the game more dynamic and not turn based. while (player1.playerAlive) { String directionPrompt

问题 (I'm new to this so now editing my question as a reproducible example). I've reviewed bootstrapping,loop and replicate functions and can't figure out how to repeat a series of steps (not just a single function) in R and store the result in dataframe. I need to randomly select 2 values from a pool of 22 values, 9 times. Then conduct a spearman rank correlation test on that dataset (2 columns, 9 rows) 10,000 times and store the value of each of those iterations. So I need to repeat these steps

问题 var funcs = []; // let's create 3 functions for (var i = 0; i < 3; i++) { // and store them in funcs funcs[i] = function() { // each should log its value. console.log("My value: " + i); }; } for (var j = 0; j < 3; j++) { // and now let's run each one to see funcs[j](); } It outputs this: My value: 3 My value: 3 My value: 3 Whereas I'd like it to output: My value: 0 My value: 1 My value: 2 The same problem occurs when the delay in running the function is caused by using event listeners: var

问题 I've got a std::list in C++ and I'm trying to use a for(Type t : list) operation to update the value of each object. So I have a list called balls and each ball has a position. My code to for the loop is: for(OpenGLView::AssetInstance ball : balls) ball.position = calculateBallPosition(ball); where calculateBallPosition takes a ball and returns its new position based on time elapsed. The problem I am running into is that the value of the elements in the list don't seem to be updating. When I