while-loop

From this answer: Is there a way to loop through a table variable in TSQL without using a cursor? I'm using the method WHILE EXISTS(SELECT * FROM #Temp) The problem is that it's outputting multiple tables, if possible I'd like to output as a single table. Declare @Id int WHILE EXISTS(SELECT * FROM #Temp) Begin Select Top 1 @Id = Id From #Temp --Do some processing here Delete #Temp Where Id = @Id End So right now it outputs this: x y -- -- 1 a x y -- -- 1 b But I'd like it to output this: x y -- -- 1 a 2 b What I'm trying to achieve , I have this in a field: 1234,1432,1235 I have a process that

Why is it possible to read a file using a while loop such as while (file >> variable) Or while (getline(xx, yy)) Do the >> and getline functions return boolean values ? The stream operators evaluate to a reference to the stream itself. This allows chaining e.g. file >> variable >> variable >> variable . When you combine it with the fact that the stream object is convertible to boolean (whose value is true iff no error flags are set) and, yes, you get that effect. Mats Petersson If we have something like: a file with data: 11 22 13 45 19 and then a C++ file: int variable; int count = 0; while(

I am trying to read an unknown number of inputs using scanf function. int a[100]; int i = 0; while((scanf("%d", &a[i])) != '\n') i++; // Next part of the code But this function is not going to next part of the code, seems like there is an infinite while loop. How Do I solve this logical error? Is there any other alternatives to scanf like sscanf to read integers into an array? scanf returns the number of input items that have been successfully matched and assigned, thus it is reasonable to do: while(scanf(...) == 1) Now you want to be able to read multiple numbers, each defined on the new line

This is a highly subjective question, so I'll be more specific. Is there any time that a do-while loop would be a better style of coding than a normal while-loop? e.g. int count = 0; do { System.out.println("Welcome to Java"); count++; } while (count < 10);` It doesn't seem to make sense to me to check the while condition after evaluating the do-statement (aka forcing the do statement to run at least once). For something simple like my above example, I would imagine that: int count = 0; while(count < 10) { System.out.println("Welcome to Java"); count++; } would be generally considered to have

do-while: do { i++; ++j; System.out.println( i * j ); } while ((i < 10) && (j*j != 25)); I am learning about do-while vs while at the moment and would like to rewrite the above java fragment (already declared and initialized) using a while instead. Are the below rewritten codes correct way to do so: while: while ((i < 10) && (j*j != 25)) { i++; ++j; System.out.println( i * j ); } Cheers The difference between a do-while and a while is when the comparison is done. With a do-while , you'll compare at the end and hence do at least one iteration. Equivalent code for your example do { i++; ++j;

I was recently making a program which needed to check the number of digits in a number inputted by the user. As a result I made the following code: int x; cout << "Enter a number: "; cin >> x; x /= 10; while(x > 0) { count++; x = x/10; } From what I can tell (even with my limited experience) is that it seems crude and rather unelegant. Does anyone have an idea on how to improve this code (while not using an inbuilt c++ function)? In your particular example you could read the number as a string and count the number of characters. But for the general case, you can do it your way or you can use a

I'm currently working with two controller classes. In Controller1 it creates a new stage that opens on top of the main one. Stage stage = new Stage(); Parent root = FXMLLoader.load(getClass().getResource("Controller2.fxml")); Scene scene = new Scene(root); stage.setScene(scene); stage.show(); Now once that stage is open, I want it to stay open for about 5 seconds before closing itself. Within Controller2, I've tried implementing something like long mTime = System.currentTimeMillis(); long end = mTime + 5000; // 5 seconds while (System.currentTimeMillis() > end) { //close this stage } but I