C++实现的split函数

/*
* Split.cpp
*
*  Created on: 2008-10-28
*      Author: root
*/
/****************************************
* split实现
****************************************/
#include <iostream>
#include <string>
#include <vector>
using namespace std;

vector<string> split(const string& src, string delimit, string null_subst = "")
{
typedef basic_string<char>::size_type s_t;
static const s_t npos = -1;
if (src.empty() || delimit.empty())
{
  throw "split:empty string\0";
}
vector<string> v;
s_t deli_len = delimit.size();
s_t index = npos, last_search_position = 0;
while ((index = src.find(delimit, last_search_position)) != npos)
{
  if (index == last_search_position)
  {
   v.push_back(null_subst);
  }
  else
  {
   v.push_back(src.substr(last_search_position, index
     - last_search_position));
  }
  last_search_position = index + deli_len;
}
string last_one = src.substr(last_search_position);
v.push_back(last_one.empty() ? null_subst : last_one);
return v;
}
int main(int argc, char **argv)
{
try
{
  string s = "abcd efg higk lm";
  string del = " ";
  vector<string> v3 = split(s, del);
  cout << "----------v3:" << endl;
  for ( unsigned int i = 0; i < v3.size(); i++)
  {
   cout << v3.c_str() << endl;
  }
} catch (char *s)
{
  cout << s << endl;
}
return 0;
}