Клык

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

using namespace std;

const int WordLength = 21;
const int SurnameLength = 16;
const int NumberStudent = 15;
const int NumberExams = 9;
struct date
{
    int Day;
    int Month;
    int Year;
};
struct student
{
    char Surname[WordLength];
    int Points;
};
struct exam
{
    int GroupNumber;
    char SubjectName[WordLength];
    char Surname[SurnameLength];
    date Date;
    student Students[15];
};
void A(string filename)
{
    exam Exam;
    ifstream fin(filename, ios::binary);
    int count = 0;
    for (int i = 0; i < NumberExams; i++)
    {
        fin.read((char*)&Exam, sizeof(exam));
        if (strcmp(Exam.SubjectName, "Информатика") == 0)
        {
            bool t = true;
            for (int i = 0; i < NumberStudent && t; i++)
            {
                if (Exam.Students[i].Points < 71) // Успешно >=71
                {
                    t = false;
                }
            }
            if (t)
                count++;
        }
    }
    cout << "Количество групп " << count;
    cout << endl << endl;
}



int main()
{
    setlocale(LC_ALL, "Russian");
    ifstream fin("input.txt");
    if (!fin.is_open())
    {
        cout << "Файл не найден ";
    }
    else
    {
        ofstream fout("input.bin", ios::binary);
        while (fin.peek() != EOF)
        {
            exam Exam;
            fin >> Exam.GroupNumber;
            fin >> Exam.SubjectName;
            fin >> Exam.Surname;
            string str;
            fin >> str;
            int chislo = 0;
            for (int i = 0; i < str.size(); i++)
            {
                if (str[i] != '.')
                {
                    chislo = chislo * 10 + str[i] - '0';
                }
                if (i == 3)
                {
                    Exam.Date.Day = chislo;
                    chislo = 0;
                }
                if (i == 6)
                {
                    Exam.Date.Month = chislo;
                    chislo = 0;
                }
                if (i == 8)
                {
                    Exam.Date.Year = chislo;
                }
            }
            for (int i = 0; i < 15; i++)
            {
                fin >> Exam.Students[i].Surname;
                fin >> Exam.Students[i].Points;
            }
            fout.write((char*)&Exam, sizeof(exam));
        }
        fin.close();
        fout.close();
        cout.setf(ios::left);
        A("input.bin");

    }
    system("pause");
    return 0;
}