Actually passing an iterator also wont do. I have vectors of different struct types. A "space separated" string is stored in one of the struct variables (all of type string) in each vector. I have to remove spaces from the "space separated" string and replace it with a comma to make it a csv string but except at one place i-e I want to keep that substring still a "space separated" string and I have also stored that "space separated" string separately in one of the struct elements.

e-g
Code:
element-1"space separated" string part of the string: "abc 123" which is for example the fifth/sixth substring in the example below 
element-2 of vector-structtype-1: "shnd 23j l94 hsi8 abc 123 md38 fhw0 8fdj"
csv element-2 of vector-structtype-1: "shnd, 23j, l94, hsi8, abc 123, md38 fhw0 8fdj"


element-1 of vector-structtype-2: "space separated" string part of the string: "klm 987" which is for example the fifth/sixth substring in the example below 
element-2 of vector-structtype-2: "dnhs j32 49l 8ish klm 987 83dm 0wfh jdf8"
csv element-2 of vector-structtype-2: "dnhs, j32, 49l, 8ish, klm 987, 83dm, 0wfh, jdf8"
The code below works fine but I dont know how to keep that specific substring still a "space separated" string.

Code:
void liffe_breach::CSVline(int Count, int ordIDno, string str) // I want this str to be an elements of a specific vector. Is it possible?
{									// because vectors are of different (struct) types
	std::stringstream Brchno;
  	Brchno << Count;
  	
  	std::stringstream IDno;
  	IDno << ordIDno;
  	
  	stringstream ss(str);
  	string word;
  	string cvsLine = "";
  	while ( ss >> word )
        {
  		cvsLine = cvsLine + word + ",";  
      	}
}