splitting a string into an array in C without using vector

Question

I am trying to insert a string separated by spaces into an array of strings without using vector in C    For example   using namespace std  int main         string line    test one two three        string arr 4          codes here to put each word in string line into string array arr     for int i   0  i  lt  4  i              cout  lt  lt  arr i   lt  lt  endl            I want the output to be   test one two three    I know there are already other questions asking string   array in C    but I could not find any answer satisfying my conditions  splitting a string into an array WITHOUT using vector

User · Answer

define MAXSPACE 25  string line     test one two three    string arr MAXSPACE   string search        int spacePos  int currPos   0  int k   0  int prevPos   0   do        spacePos   line find search currPos        if spacePos  gt   0                 currPos   spacePos          arr k    line substr prevPos  currPos - prevPos           currPos            prevPos   currPos          k             while  spacePos  gt   0    arr k    line substr prevPos line length      for int i   0  i  lt  k  i         cout  lt  lt  arr i   lt  lt  endl

User · Answer

It is possible to turn the string into a stream by using the std  stringstream class  its constructor takes a string as parameter   Once it s built  you can use the  gt  gt  operator on it  like on regular file based streams   which will extract  or tokenize word from it    include  lt iostream gt   include  lt sstream gt   using namespace std   int main        string line    test one two three        string arr 4       int i   0      stringstream ssin line       while  ssin good    amp  amp  i  lt  4           ssin  gt  gt  arr i             i            for i   0  i  lt  4  i             cout  lt  lt  arr i   lt  lt  endl

User · Answer

include  lt iostream gt   include  lt sstream gt   include  lt vector gt  using namespace std   int main          string s1  split on     whitespace       istringstream iss s1       vector lt string gt  result      for string s iss gt  gt s           result push back s       int n result size        for int i 0 i lt n i            cout lt  lt result i  lt  lt endl      return 0      Output -  split on whitespace

User · Answer

include  lt iostream gt   include  lt sstream gt   include  lt iterator gt   include  lt string gt   using namespace std   template  lt size t N gt  void splitString string   amp arr  N   string str        int n   0      istringstream iss str       for  auto it   istream iterator lt string gt  iss   it    istream iterator lt string gt     amp  amp  n  lt  N    it    n          arr n     it     int main         string line    test one two three        string arr 4        splitString arr  line        for  int i   0  i  lt  4  i           cout  lt  lt  arr i   lt  lt  endl

User · Answer

Here s a suggestion  use two indices into the string  say start and end  start points to the first character of the next string to extract  end points to the character after the last one belonging to the next string to extract  start starts at zero  end gets the position of the first char after start  Then you take the string between  start  end  and add that to your array  You keep going until you hit the end of the string

[c++] splitting a string into an array in C++ without using vector

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