read input separated by whitespace s or newline

Question

I m grabbing input from a standard input stream  Such as   1 2 3 4 5   or  1 2 3 4 5   I m using   std  string in  std  getline std  cin  in     But that just grabs upto the newline  correct  How can I get input whether they are separated by newline OR whitespace s  using only iosteam  string  and cstdlib

User · Answer

std  getline  stream  where to   delimiter ie  std  string in  std  getline std  cin  in          will split on space   or you can read in a line  then tokenize it based on whichever delimiter you wish

User · Answer

Use  q  as the the optional argument to getline    include  lt iostream gt   include  lt sstream gt   int main         std  string numbers str      getline  std  cin  numbers str   q          int number      for   std  istringstream numbers iss  numbers str              numbers iss  gt  gt  number              std  cout  lt  lt  number  lt  lt                 http   ideone com I2vWl

User · Answer

int main         int m      while cin gt  gt m                  This would read from standard input if it space separated or line separated

User · Answer

Just use   your type x  while  std  cin  gt  gt  x           use x     operator gt  gt  will skip whitespace by default   You can chain things to read several variables at once   if  std  cin  gt  gt  my string  gt  gt  my number         use them both   getline   reads everything on a single line  returning that whether it s empty or contains dozens of space-separated elements   If you provide the optional alternative delimiter ala getline std  cin  my string       it still won t do what you seem to want  e g  tabs will be read into my string   Probably not needed for this  but a fairly common requirement that you may be interested in sometime soon is to read a single newline-delimited line  then split it into components     std  string line  while  std  getline std  cin  line         std  istringstream iss line       first type first on line      second type second on line      third type third on line      if  iss  gt  gt  first on line  gt  gt  second on line  gt  gt  third on line

User · Answer

the user pressing enter or spaces is the same   int count   5  int list count      array of known length cout  lt  lt   enter the sequence of    lt  lt  count  lt  lt    numbers space separated        user inputs values space separated in one line   Inputs more than the count are discarded  for  int i 0  i lt count  i          cin  gt  gt  list i

User · Answer

include  lt iostream gt   using namespace std   string getWord istream amp  in         int c       string word          TODO  remove whitespace from begining of stream        while   in eof                     c   in get             if  c           c      t     c      n    break           word    c             return word     int main         string word       do            word   getWord cin            cout  lt  lt       lt  lt  word  lt  lt              while  word               return 0

[c++] read input separated by whitespace(s) or newline...?

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