квик

#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>

using namespace std;

struct Student
{
        string surname;
        string name;
        string patronymic;
        int year;
        int marks [5];
};

void qsort(Student *a, int l, int r)
{
        int i = l, j = r;
        string p = a[(i + j) / 2].surname;
         while ( i <= j )
        {
                while ( a[i].surname < p ) i++;
                while ( p < a[j].surname ) j--;
                if (i <= j)
                {
                        swap (a[i], a[j]);
                        i++; j--;
                }
        }

        if ( l < j ) qsort(a, l, j);
        if ( i < r ) qsort(a, i, r);
}
int main()
{
        int n=0;
        Student list [100];
        ifstream inp ("list.txt");
        setlocale(LC_ALL,"Russian");
        while (inp.peek()!=EOF)
        {
                inp >> list[n].surname;
                inp >> list[n].name;
                inp >> list[n].patronymic;
                inp >> list[n].year;
                for(int i=0; i < 5; i++)
                        inp >> list[n].marks[i];
                n++;
        }
        qsort(list, 0, n-1);
        ofstream out ("list2.txt");
        for( int i = 0; i < n; i++)
        {
                out << list[i].surname << " " << list[i].name << " " << list[i].patronymic << " " << list[i].year << " ";
                for(int j = 0; j < 5; j++)
                        out << list[i].marks[j] << " ";
                out << endl;
        }
        inp.close();
        out.close();
        return 0;
}