getline

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have the following code: std::vector<std::string> final_output; std::string input; int tries = 0; std::cin >> tries; int counter = 0; while(counter < tries) { std::getline(std::cin, input); final_output.push_back(input); ++counter; } Given the input: 3 Here Goes Here Goes 2 The output is: <blank line> Here Goes Here Goes 2 Weirdly, it seems to enter a blank line as input for the first time it runs. However, if I have the code as: int tries = 3; // explicitly specifying the number of tries int counter = 0; while(counter < tries) {} It works

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have this code which is supposed to cout in console the information from the .csv file; while(file.good()) { getline(file, ID, ','); cout And a csv file that has this (when I open with notepad): 0,Filipe,19,M 1,Maria,20,F 2,Walter,60,M Whenever I run the program the console will display this: My question is why isn't the program repeating those cout messages in every line instead of only in the first one Btw , nome is name, idade is age, and genero/sexo is gender, forgot to translate before creating this post 回答1: You can follow this

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am learning to use getline in C programming and tried the codes from http://crasseux.com/books/ctutorial/getline.html #include #include #include int main(int atgc, char *argv[]) { int bytes_read = 1; int nbytes = 10; char *my_string; my_string = (char *)malloc(nbytes+1); puts("Please enter a line of text"); bytes_read = getline(&my_string, &nbytes, stdin); if (bytes_read == -1) { puts ("ERROR!"); } else { puts ("You typed:"); puts (my_string); } return 0; } However, the problem is that the compiler keeps returning errors of this: undefined

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: There is a large text file of 6.53 GiB. Each line of it can be a data line or comment line. Comment lines are usually short, less than 80 characters, while a data line contains more than 2 million characters and is variable-length. Considering each data line needs to be dealt with as a unit, is there a simple way to read lines safe and fast in C++? safe (safe for variable-length data lines): The solution is as easy to use as std::getline() . Since the length is changing, it is hoped to avoid extra memory management. fast : The solution can

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I'm getting this error when I try to read the output of a command line by line: std :: string exec ( const char * cmd ) { FILE * pipe = popen ( cmd , "r" ); if (! pipe ) return "" ; char buffer [ 128 ]; std :: string result = "" ; while (! feof ( pipe )) { if ( fgets ( buffer , 128 , pipe ) != NULL ) { result += buffer ; } } pclose ( pipe ); return result ; } string commandStr = "echo Hello World" ; const char * command = commandStr . c_str (); std :: string output = exec ( command ); std :: string line ; while ( std :: getline (

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: #include #include using namespace std ; int main () { string str ; int age ; cout << "Please enter age: " ; cin >> age ; cout << "Please enter full name: " ; getline ( cin , str ); cout << "Thank you, " << str << ".\n" ; } Why function getline() not work when I using uperator >> to input integer ? What is better use for int input ? 回答1: You still have a newline in the stream after cin>>age; , which is giving you an empty string for the name. You could solve it by just adding another getline() call after getting the age and throwing

I'm trying to turn a cout command into a getline command in c++. This is my code that I'm trying to changes.... for (int count=0; count < numberOfEmployees; count++) { cout << "Name: "; cin >> employees[count].name; cout << "Title: "; cin >> employees[count].title; cout << "SSNum: "; cin >> employees[count].SSNum; cout << "Salary: "; cin >> employees[count].Salary; cout << "Withholding Exemptions: "; cin >> employees[count].Withholding_Exemptions; } I'm trying to change this line: cin >> employees[count].name; and this line: cin >> employees[count].title; into getlines. Can anyone help? Thanks

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: In this question Will's answer states that the following code (let's call it code A ): reverse2lines :: IO () reverse2lines = do line1 <- getLine line2 <- getLine putStrLn ( reverse line2 ) putStrLn ( reverse line1 ) can be transformed into the following (let's call it code B ) : reverse2lines = do { line1 <- getLine ; do { line2 <- getLine ; do { putStrLn ( reverse line2 ) ; do { putStrLn ( reverse line1 ) } } } } I am confused. I understand, for example, that addOneInt :: IO () addOneInt = do line <- getLine putStrLn ( show ( 1 +

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am doing an exercise for fun from K and R C programming book. The program is for finding the longest line from a set of lines entered by the user and then prints it. Inputs: This is a test This is another long test this is another long testthis is another long test Observation: It runs fine for the first two inputs but fails for the larger string (3rd input) Errors: Error in `./longest': realloc(): invalid next size: 0x000000000246e010 *** Error in `./longest': malloc(): memory corruption (fast): 0x000000000246e030 *** My efforts: I have