strange error

[akimatsu123]

i cant, for the life of me, figure out what is wrong with this program. i get a segmentation error. i can't assign any value to userInput. why? instead of using getline(), ive even tried using something as simple as

userInput = "hello";

except it still spits out a segmentation error. here is the code. someone please help

#include <iostream>
#include <string>
#include <vector>
#include <cctype>
using namespace std;

int main(void)
{
	vector<string> words;
	int y = 0;
	int i = 0;
	int j = 0;

	string userInput;
	cout << "Enter your statement: ";
	getline(cin, userInput);
	cout << userInput;

	int size = userInput.size();
	
	for(; i < size; i++)
	{
		while(isspace(userInput[i]) == true)
		{
			continue;
		}
		
		j = i;

		while(isspace(userInput[j]) == false)
		{
			j++;
		}
		

		words.push_back(userInput.substr(i, j - i));

		y++;
		
		i = j;
	}
	
	for(unsigned int x = 0; x < words.size(); x++)
	{
		cout << words[x] << endl;
	}
	
	return 0;
}

[Duthomhas]

is this always true (i < size) ?

(hint: try running your program an typing in a string that ends with a space.)

A cleaner way would be to use a stringstream:

#include <iostream>
#include <sstream>
#include <string>
#include <vector>
using namespace std;

int main()  // no void: this is C++, not C99
  {
  vector<string> words;

  string userInput;
  cout << "Enter your statement: ";
  getline(cin, userInput);
  cout << '\"' << userInput << '\"' << endl;

  {
  stringstream ss( userInput );
  string s;
  while (getline( ss, s, ' ' ))
    words.push_back( s );
  }

  for (int i = 0; i < words.size(); i++)
    cout << words[ i ] << endl;

  return EXIT_SUCCESS;
  }

[DiptenduDas]

May be due to the below lines code

		while(isspace(userInput[j]) == false)
		{
			j++;
		}

"j" goes on increasing iff Ur last character is not a space one...

Check the value of j again size may help u.

		while(isspace(userInput[j]) == false)
		{
			j++;
			if(j>=size)
				break;
		}

[guestgulkan]

This bit looks like an infinite loop as well if the string starts with a space

		while(isspace(userInput[i]) == true)
		{
			continue;
		}