Getline not working in while loop

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August undefined, 2024

WebNov 10, 2012 · This do-while loop will execute at least one time, because the condition gets checked at the end of the loop execution. So even if the user does not press Y when asked the first time, this loop would have been executed once. After that, it will go on as long as the condition is fulfilled. Learn more about the do-while loop here. WebApr 26, 2024 · This is because the Enter/Return you use to submit the info is getting extracted by getline (), which stops at the first '\n' character it sees. One way to fix it is use cin.ignore (), after your custom input. Mind that if reading from file, you should end the line after class input to get the same result as here.

Break in getline loop c++ - Stack Overflow

Web2 days ago · It reads a line and discards it. 10 being the confused would-be programmer's way of writing '\n'. The author of GetLine probably intended that it skip until the end of the line, but if the stream is already at the end of a line it will skip the next line. If there is a read error, it enters an infinite loop. WebSep 22, 2024 · Your current program is looping endlessly because getline returns std::basic_istream, so while (getline ()) will never equate to 'false'. As @0x499602D2 has stated, your program is working as intended, but the extraction from getline can only end in two ways, as indicated by the reference here: ramadan comprehension ks2

c++ - Using getline with CSV - Stack Overflow

Web1 day ago · Q&A for work. Connect and share knowledge within a single location that is structured and easy to search. ... /** * Programming Assignment 2 * @return exit status */ int main() { // loop while there's more input std::string Input; std::getline(std::cin, Input); while (Input[0] != 'q') { // extract point coordinates from string ... WebJun 18, 2024 · getline() not working second time in a while loop c++while-loop 15,950 Solution 1 cin >> yes; Right there, the user enters a letter, let's say 'y'. Then hits enter. This stores 2 characters in the input buffer, 'y' and '\n'. The 'y' gets stored in yes, but the '\n' remains. When you get to here again: getline (cin, option); WebAfter constructing and checking the sentry object, performs the following: 1) Calls str.erase () 2) Extracts characters from input and appends them to str until one of the following occurs (checked in the order listed) a) end-of-file condition on input, in … ramadan competition ideas

i need help with my code it not working if you can test it and...

Using getline() with file input in C++ - Stack Overflow

Web1 Answer. The problem is you are at the end of the file when you go to actually store the data. Reads the file all the way to the end and then sets the EOF flag on the string. Then you get to. while (! openFile.eof ()) { for (int i = 0; i < counter; i++) { getline ( openFile, a [i], '/'); getline ( openFile, b [i], '/'); getline ( openFile, c ... WebNov 4, 2012 · Now, your problem with getline has nothing to do with it being in a while loop. Look up getline in your VC++ Help Search and notice the example. and the … ramadan cookies for kidsWebThe above code is a C++ program that creates a Student Management System. The program takes in student data such as names, student numbers, DOB, Email and GPA, and stores it in an array. The program can add and remove students from the array, and also modify existing student data. The program can also print out a list of students and their ... overdrive on computer

"WebJun 30, 2024 · getline extracts characters from input and appends them to str until it meet one of the end conditions, in your situaton the end condition is the endline character '\n', because the default delimeter is the endline character. You may define your own delimeter getline (intput, str, $your_delemeter) , and do a little experiment. Share " - Getline not working in while loop

Getline not working in while loop

getline not working properly ? What could be the reasons?

WebMay 2, 2024 · You are you using variable x while it is commented. Un-comment it & code will compile. Second, to make the code quit when name is quit, need to change it to: while (stu [i-1].name != "quit") Notice the i-1 instead of i, and != instead of == Third, I guess you don't need want to print on last for loop the name "quit" - so need to print up to i-1 WebSep 2, 2012 · There are two overloads for std::getline: istream& getline ( istream& is, string& str, char delim ); istream& getline ( istream& is, string& str ); Three of your calls pass a literal string constant as the third parameter, where a single char is required. Use ' rather than " for character constants.

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WebAug 3, 2024 · Potential Issues with using std::getline () While std::getline () is a very useful function, there could be some problems that you may face when using it along with some … WebWith an odd number of lines, the last line goes through getline $0, then getline tmp fails but you aren't checking the return status so this merely leaves tmp unchanged, and you end up printing the next-to-last line again. Share Improve this answer answered May 28, 2024 at 1:24 Gilles 'SO- stop being evil' 791k 190 1632 2134 Add a comment

WebMar 12, 2015 · Your problem is that stream's error flags get set when getline finds more characters than the maximum set. (see the description at std::basic_istream::getline count-1 characters have been extracted (in which case setstate (failbit) is executed). and If the function extracts no characters (e.g. if count < 1), setstate (failbit) is executed. WebMar 1, 2013 · When this offset reaches the end, it stops the first loop, ( eof () returns false). You need to reset this internal position back to the beginning of the file, before reading again. You do that by saying: myFile.clear (); // clear stream flags and error state myFile.seekg (0, ios::beg); // reset read position before the second loop.

WebDec 30, 2011 · getline (cin, option); Since there's already a newline character in the buffer, getline has what it's looking for, and doesn't need to prompt the user. There are a few …

WebNov 1, 2024 · My problem is that I am able to use getline (file, string) to read the lines in the second file in the first pass of the loop but am unable to see the values when i try and run the loop again. here is the code:

WebJan 13, 2014 · Std::getline itself does move the file towards the end – Gasim Jan 13, 2014 at 1:25 1 @Gasim, click on the link that chris provided to see why while (!eof ()) is "wrong". More specifically, it's not a good way to check this kind of loop since one must attempt to read the EOF before eof () is true. It doesn't tell you if you are "at" the EOF. overdrive ostrich heart tankWebSep 28, 2024 · getline (Fin, Item); if (Item != "") { } else { } // how do i do a while loop to make it start the process over again } } else if ( input == "no") { cout << "Would you like to input your own items? [yes/no]" << endl;} return 0; } it gives me the correct variables in the correct spot (sort of) but the formatting is all out of place? output: ramadan cookies machineWebDec 23, 2013 · getline, as it name states, read a whole line, or at least till a delimiter that can be specified. So the answer is "no", getline does not match your need. But you can do something like: inFile >> first_name >> last_name >> age; name = first_name + " " + last_name; Share Improve this answer Follow answered Dec 23, 2013 at 8:19 Johan … overdrive on acer monitorWebMar 31, 2014 · 1 1 ch is indeterminate when first used in this code, and as such even evaluating it is undefined behavior. You may want to fix that second. First, get rid of gets (), a function so vile it has been removed from the standard library. – WhozCraig Mar 31, 2014 at 7:11 1 Where have you used cin.getline (). I can't see it anywhere – coder hacker ramadan concerns for diabetic patientsWebgetline (cin, option); Since there's already a newline character in the buffer, getline has what it's looking for, and doesn't need to prompt the user. There are a few solutions to this. You could add a call to cin.ignore () after cin >> yes. Or you could make yes a string, and use getline instead of operator>> there. Benjamin Lindley 99184 ramadan countdown printableWebJul 1, 2024 · Now, your problem with getline has nothing to do with it being in a while loop. Look up getline in your VC++ Help Search and notice the example. and the parameters. When to use Getline ( ) in C + +? The reason is that getline () reads till enter is encountered even if no characters are read. overdrive or distortion firstWebSep 11, 2024 · CS121/main.cpp. # include // allows for reading and writing from a file. //was getting an extra line so had to add an if statement to nullify the extra line from the file. myfile. close (); //closes the txt file. ramadan cover photos for facebook