count #of words and characters..!!

[munjo5746]

int main() {
	unsigned long i=0;
	unsigned long len=0;
	unsigned long st_pos=0;
	unsigned long i_init = 0;
	unsigned long index = 0;
	string s = "this example has multiple lines";
	vector<string> word;
	while(true){
		if(index >= s.size()-1) break;
		if(s[index] != ' ') {
			for(int a = index+1; a << s.size();a++) {
				if(s[a] == ' '){
					st_pos = index;
					len = a-index;
					word.push_back(s.substr(st_pos,len));
					index = a;
					break;
				}
				else if(a==s.size()-1){
					st_pos = index;
					word.push_back(s.substr(st_pos));
					index = a;
					break;
				}
			}
		
		}
		
		
		index++;	
		}
	int num = 0;
	int num1 = 0;
	for(int i = 0; i<word.size(); i++) {
	
		cout<<word[i]<<"\t"<<word[i].size()<<endl;
		num1 += word[i].size();
	}
	cout<<word.size()<<"\t"<<num1<<endl;
	return 0;
}

This code suppose to return the #of words and #of characters..!!
However, this returns e 1
1 1

If is assign s = "this is another example", this returns 4 20 which is correct!! can anyone fix this?? and plz explain why!! Thank you!!