Split string by single spaces

Question

Possible Duplicate    How to split a string in C          I need to split a string by single spaces and store it into an array of strings  I can achieve this using a istringstream  but what I am not being able to achieve is this   I want every space to terminate the current word  So  if there are two spaces consecutively  one element of my array should be blank   For example    underscore denotes space   This is a string  gets split into  A 0    This A 1    is A 2    a A 3    string   This  is a string  gets split into  A 0    This A 1       A 2    is A 3    a A 4    string    How can I implement this

User · Answer

You could also just use the old fashion 'strtok'

http://www.cplusplus.com/reference/clibrary/cstring/strtok/

Its a bit wonky but doesn't involve using boost (not that boost is a bad thing).

You basically call strtok with the string you want to split and the delimiter (in this case a space) and it will return you a char*.

From the link:

#include <stdio.h>
#include <string.h>

int main ()
{
  char str[] ="- This, a sample string.";
  char * pch;
  printf ("Splitting string \"%s\" into tokens:\n",str);
  pch = strtok (str," ,.-");
  while (pch != NULL)
  {
    printf ("%s\n",pch);
    pch = strtok (NULL, " ,.-");
  }
  return 0;
}

User · Answer

You could used simple strtok   function    From here  Note that tokens are created on delimiters   include  lt stdio h gt   include  lt string h gt   int main        char str     - This is a string     char   pch    printf   Splitting string    s   into tokens  n  str     pch   strtok  str     -      while  pch    NULL          printf    s n  pch       pch   strtok  NULL      -          return 0

User · Answer

You can even develop your own split function  I know  little old-fashioned    size t split const std  string  amp txt  std  vector lt std  string gt   amp strs  char ch        size t pos   txt find  ch        size t initialPos   0      strs clear            Decompose statement     while  pos    std  string  npos             strs push back  txt substr  initialPos  pos - initialPos              initialPos   pos   1           pos   txt find  ch  initialPos                  Add the last one     strs push back  txt substr  initialPos  std  min  pos  txt size     - initialPos   1           return strs size        Then you just need to invoke it with a vector lt string gt  as argument   int main         std  vector lt std  string gt  v       split   This  is a  test   v             dump  cout  v         return 0      Find the code for splitting a string in IDEone   Hope this helps

User · Answer

If you are averse to boost  you can use regular old operator gt  gt   along with std  noskipws   EDIT  updates after testing    include  lt iostream gt   include  lt iomanip gt   include  lt vector gt   include  lt string gt   include  lt algorithm gt   include  lt iterator gt   include  lt sstream gt   void split const std  string amp  str  std  vector lt std  string gt  amp  v      std  stringstream ss str     ss  gt  gt  std  noskipws    std  string field    char ws delim    while 1        if  ss  gt  gt  field         v push back field       else if  ss eof          break      else       v push back std  string         ss clear        ss  gt  gt  ws delim         int main       std  vector lt std  string gt  v    split  hello world  how are   you   v     std  copy v begin    v end    std  ostream iterator lt std  string gt  std  cout   -       std  cout  lt  lt    n       http   ideone com 62McC

User · Answer

Can you use boost   samm  cat split cc  include  lt boost algorithm string classification hpp gt   include  lt boost algorithm string split hpp gt    include  lt boost foreach hpp gt    include  lt iostream gt   include  lt string gt   include  lt vector gt   int main         std  string split me   hello world  how are   you          typedef std  vector lt std  string gt  Tokens      Tokens tokens      boost  split  tokens  split me  boost  is any of              std  cout  lt  lt  tokens size    lt  lt    tokens   lt  lt  std  endl      BOOST FOREACH  const std  string amp  i  tokens             std  cout  lt  lt       lt  lt  i  lt  lt       lt  lt  std  endl            sample execution   samm    a out 8 tokens  hello   world      how   are         you  samm

User · Answer

If strictly one space character is the delimiter  probably std  getline will be valid  For example   int main       using namespace std    istringstream iss  This  is a string      string s    while   getline  iss  s                printf     s  n   s c str

User · Answer

If you are not averse to boost  boost tokenizer is flexible enough to solve this   include  lt string gt   include  lt iostream gt   include  lt boost tokenizer hpp gt   void split and show const std  string s        boost  char separator lt char gt  sep          boost  keep empty tokens       boost  tokenizer lt boost  char separator lt char gt   gt  tok s  sep       for auto i   tok begin    i  tok end      i              std  cout  lt  lt       lt  lt   i  lt  lt      n     int main         split and show  This is a string        split and show  This  is a string         test  https   ideone com mN2sR

[c++] Split string by single spaces

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