08-00-generic-split.cpp

#include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include <iterator>

using namespace std;

bool not_space(char c)
{
    return !isspace(c);
}
bool space(char c)
{
    return isspace(c);
}

template <class Out>
void split(const string& str, Out os)
{
    typedef string::const_iterator iter;
    iter i = str.begin();
    while( i != str.end()) {
        // ignore leading blanks
        i = find_if(i, str.end(), not_space);

        // find end of next word
        iter j = find_if(i, str.end(), space);

        // copy the characters in [i,j)
        if( i != str.end())
            *os++ = string(i,j);

        i = j;
    }
}


int main()
{
    string s;
    vector<string> v;

    while(getline(cin, s)) {
        split(s, back_inserter(v));
    }
    cout << "result: ";
    copy(v.begin(),v.end(),ostream_iterator<string>(cout," "));
    cout << endl;

    stringstream ss;
    copy(v.begin(),v.end(),ostream_iterator<string>(ss," "));
    s = ss.str();
    cout << "result2: " << s << endl;

    cout << "result3: " << endl;
    split(s, ostream_iterator<string>(cout,"\n"));
    return 0;
}