do-while

C++ (negative verification is not working

由 十年热恋 提交于 2019-12-08 04:33:09
问题 Testing cin for non numeric, non zero,and non negative values and entering loop. Cannot see why the test for values <=0 portion is not working. it should output: cout << "Invalid value input\n"; Thanks in advance for catching what is probably a silly error. #include <iostream> using namespace std; int main() { unsigned int integer; cout<< "Enter a non negative number greater than 0: "; cin>> integer; do { while(!cin || integer <= 0)//validation condition { cout << "Invalid value input\n"; cin

Non-numerical input causes endless loop

由 余生颓废 提交于 2019-12-08 02:15:29
问题 For some reason, if the user inputs the wrong data type, such as 'j' or '%', the loop will stop asking for input and will keep displaying "Enter an integer >" over and over. How can I make the program handle bad inputs? And why does entering a non-numerical value cause such strange behavior? #define SENTINEL 0; int main(void) { int sum = 0; /* The sum of numbers already read */ int current; /* The number just read */ do { printf("\nEnter an integer > "); scanf("%d", &current); if (current >

Java: using hasNextInt with do-while loop, it ignores integer inputs at even times

由 安稳与你 提交于 2019-12-08 01:32:24
问题 I am trying to learn Java programming by myself and came across the course CS106A provided by Stanford. It's a great free online course. I watched several of the lecture videos and I enjoyed them so far. I am now trying to do the assignments and I have this problem I can't solve by myself. It is the number 5 of this assignment. Basically, it requires the learner to create a console program to get some integers input by the user and in response, showing the biggest and smallest number. The

do while loop based on a value available in cell (find) in vba

由 耗尽温柔 提交于 2019-12-07 22:14:55
问题 Hi i am writing a code in vb to check a particular value in a sheet, if the value is not available then it should go back to another sheet to take new value to find, if the value is found i have to do some operation on that sheet i have the below code to find the value in the sheet but if i pass the same in a DO WHILE loop as condition it gives a compile error find vaue code Selection.Find(What:=last_received, After:=ActiveCell, LookIn:= _ xlFormulas, LookAt:=xlPart, SearchOrder:=xlByRows,

Java: using hasNextInt with do-while loop, it ignores integer inputs at even times

由 爷，独闯天下 提交于 2019-12-06 09:25:25
I am trying to learn Java programming by myself and came across the course CS106A provided by Stanford. It's a great free online course. I watched several of the lecture videos and I enjoyed them so far. I am now trying to do the assignments and I have this problem I can't solve by myself. It is the number 5 of this assignment . Basically, it requires the learner to create a console program to get some integers input by the user and in response, showing the biggest and smallest number. The following code is what I have done and the problem is when I try to input integers, it will skip the even

do while loop based on a value available in cell (find) in vba

由 断了今生、忘了曾经 提交于 2019-12-06 07:50:26
Hi i am writing a code in vb to check a particular value in a sheet, if the value is not available then it should go back to another sheet to take new value to find, if the value is found i have to do some operation on that sheet i have the below code to find the value in the sheet but if i pass the same in a DO WHILE loop as condition it gives a compile error find vaue code Selection.Find(What:=last_received, After:=ActiveCell, LookIn:= _ xlFormulas, LookAt:=xlPart, SearchOrder:=xlByRows, SearchDirection:= _ xlNext, MatchCase:=False, SearchFormat:=False).Activate could some one please help me

Java loop efficiency

由 元气小坏坏 提交于 2019-12-04 17:42:12
问题 I'm comparing the efficiency of nested for, while and do-while loops in Java, and I've come across some strange results that I need help understanding. public class Loops { public static void main(String[] args) { int L = 100000; // number of iterations per loop // for loop double start = System.currentTimeMillis(); long s1 = 0; for (int i=0; i < L; i++) { for (int j = 0; j < L; j++) { s1 += 1; } } double end = System.currentTimeMillis(); String result1 = String.format("for loop: %.5f", (end

Nodejs - Re-Calling function on error callback - Is there a non blocking way?

由 ♀尐吖头ヾ 提交于 2019-12-04 11:19:44
I got a function which makes a request to an API. Sometimes the API got some hiccups and isnt available for a second or two every now and then, resulting in an error on which I'd like to call the function again. Since there are another 70~80 lines of code following this callback, I wouldnt like to split the flow with an if(error) <do the same stuff> else <as here> After trying for quite some time I ended up using a do-while(error) loop, which works but blocks. Is there an async way of doing this? My code (simplified for generalization): //This is the request part function bar(j, callback){ j++

Java SE do while loop issues

由 纵饮孤独 提交于 2019-12-04 06:37:09
问题 I have a problem with my java application when i compile my codes it says that it cannot find symbol roomLength . what the application supposed to do is prompt the user to input a room name then if it is "quit" then it has to close the program. otherwise it will prompt for the length, width and height of the room. if any of these dimensions is zero or lesser, it will reprompt for the dimensions again. class Room { private String name; private double length; private double width; private

In what situations can do-while be more efficient than while?

由 余生颓废 提交于 2019-12-04 03:53:47
While vs. do-while While and do-while are functionally equivalent when the blocks are empty , although while seems more natural: do {} while (keepLooping()); while (keepLooping()) {} One typical use case of a while/do-while with an empty block is to force an update of atomic objects with a compareAndSet (CAS). For example the code below will increment a in a thread-safe way: int i; AtomicInteger a = new AtomicInteger(); while (!a.compareAndSet(i = a.get(), i + 1)) {} Context Several parts of java.util.concurrent use the do {} while (...) idiom for CAS operations and the javadoc of ForkJoinPool
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