page_74_default_list

/*4. Ñîçäàòü  ñïèñîê  èç  ñëîâ.  Ïîäñ÷èòàòü,  ñêîëüêî  ñëîâ  íà÷èíàåòñÿ
íà  äàííóþ  áóêâó.
Ñîçäàòü èç íèõ íîâûé ñïèñîê, óäàëèâ èõ èç èñõîäíîãî ñïèñêà.*/

#include <fstream>
#include <string>
#include <list>
using namespace std;
int main(){
    list<string> l1;
    list<string> l2;
    string str, a;
    int cnt = 0;
    ifstream in ("input.txt");
    ofstream out ("output.txt");
    in >> a;
    while (in >> str){
        l1.push_back(str);
        if (str.find_first_of(a) < string::npos) cnt++;  }
    in.close();
    while (!l1.empty()){
        string q = l1.front();
        if (q.find_first_of(a) != string::npos){ l1.pop_front(); continue;} else l2.push_back(q);
        l1.pop_front();
    }
    while (!l2.empty()){
        out << l2.front() << ' ';
        l2.pop_front();}
    out << '\n' << "Count = " << cnt << endl;
    out.close();
    return 0;
}