SPLIT

vector<string> split(const string & s)

{

vector<string> ret;

typedef string::size_type string_size;

string_size i = 0;

while(i != s.size( ) ) {

// ignore leading blanks

while ( i != s.size( ) && isspace ( s[i] ) ) ++i;

// find end of next word

string_size j = i;

while ( j != s.size( ) && !isspace( s[j] ) ) ++j;