user-input | 易学教程

confused by control flow execution in C++ Primer example

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问题 I am going through C++ Primer (5th ed). In section 1.4.4, there is the following example: #include <iostream> int main() { // currVal is the number we're counting; we'll read new values into val int currVal = 0, val = 0; // read first number and ensure that we have data to process if (std::cin >> currVal) { int cnt = 1; // store the count for the current value we're processing while (std::cin >> val) { // read the remaining numbers if (val == currVal) // if the values are the same ++cnt; //

In Python, how could I get a user input while simultaneously running the script?

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问题 In my program I am trying to take the chat from a website and printing it on my console. While that's going on I'm using raw_input to get chat from whoever is using it. My problem is that raw_input pauses the rest of the script until i say something or press enter. Is there a simple way to fix this? 回答1: You have to multithread. One thread for user input and another for the background tasks. The documentation is a bit complex (I'm pretty confused by it), but it's a start: http://docs.python

Check if username already exists in the register form

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I have the follwing register form: <h:form id="newCustomerForm" > <fieldset> <legend>Register Form</legend> <table border="0" > <tbody > <tr type="text"> <td> <p:outputLabel value="Account Login :" for="pseudo"/> </td> <p:spacer height="5px" /> <td> <p:inputText id="pseudo" value="#{customerMB.login}" title="Pseudo" required="true" requiredMessage="The Pseudo field is required."/> <p:watermark for="pseudo" value="Login" /> <p:message for="pseudo"/> </td> </tr> <p:spacer height="5px" /> <tr type="password"> <td> <p:outputLabel value="Password :" for="pwd1"/> </td> <p:spacer height="5px" /> <td>

Python - User input to CGI via. Threading and reading file

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问题 Look at the bottom of this post, for final working code. It's a working Python/CGI script which can get user-input to a CGI-script by calling another script which then sends it's commands through a local socket. Original post: As far as I know, there isn't any way to send user input directly to a Python/CGI script which has allready sent it's header. Like, warning the user under specific circumstances and waiting for a confirmation. Neither have I been able to find any published solutions to

C++ console input blocks so i can't kill thread

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问题 My program has many different threads handling different things, and one of them deals with user input. The other threads don't have much in the way of blocking calls, and those that do block are network based so will be interrupted or return gracefully when the socket is shut down. However the user thread has calls to std::cin in order to grab the user input. The effect this has is while all the other threads are dead the user thread is still blocking on user input, and will only die the

html5 input pattern attribute not working outside a form?

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问题 this fiddle works as intended - it displays a warning when the user enters an invalid country code. This other fiddle, without the form element, doesn't work. It seems the input's pattern attribute needs a form to validate. By the way, I'm doing a complex page without forms and I' d like to validate my input fields with `pattern . Is there a way to do that? 回答1: This is because the validation is part of the HTML5 form validation (http://www.w3.org/TR/html5/forms.html#client-side-form

taking user input array in java using scanner class [duplicate]

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问题 This question already has answers here : How to put a Scanner input into an array… for example a couple of numbers (11 answers) Closed 5 years ago . How to take input from user side for array using scanner class? Any other method will also be appreciated. for example, if we need to create an array and then taking input from user side. Thank you!! 回答1: Check the following code...It is for reading integer array public class TakingInput { public static void main(String[] args) { Scanner s=new

User input is not promted in CentOS7 using systemctl or service command

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Am trying to stop the system service using systemctl or service command. The command as follows systemctl start service_name or service service_name start In that stop method am asking user to enter password which is not display on console(Suspecting ran in background). Stop method as follows stop() { read -s -p "Please provide password to stop the service" passwd } The same ran in CentOS 6 using service command, its displayed on console and entered the input. Can anyone please suggest me that am I missed something here to prompt or how we can prompt the user input using systemctl. Honey

Continuous input commands

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My program will read user keyboard commands in the form of " command parameter " with a space in between. It keeps carrying out individual commands until the next command is " exit ". Also, if the user messes up, the program should show an error but continue asking for commands (a feature I don't think I have completed).. Is the following code a good way of implementing this? Could it handle the user simply pressing the enter key w/o a command, junk input, etc? If anything, I would love to know if there is a better idiomatic way implementing this. String command = ""; String parameter = "";

Allow line editing when reading input from the command line

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I already know how to get the input from user keyboard. I can use the readLine() method or let input = FileHandle.standardInput let inputData = input.availableData var text = String(data: inputData, encoding: .utf8) But the two methods get also when the user press an arrow key button. I would like to filter the input in order to remove these data. I want that the user can write something, maybe go back with the left arrow key, change something and insert the data without problem. Thanks! What you are looking for is the “line editing feature” which is provided by libedit on macOS. In order to