Laba4

/////////////////////////////////main.cpp

#include <iostream>
#include "Laba4.h"

int main() {

    student* studentsList = getStudentsFromFile();
    std::cout << "Cout of students is: " << studentsCount;
    std::cout << "\n STUDENTS : \n\n";
    printStudentsInformation(studentsList);
    std::cout << "\n Students, which have avg 4 and more : \n\n";
    calculateAndPrintAvgMarkMore4(studentsList);
    std::cout << "\n The best Disziplin is : \n\n";
    calculateAndPrintTheBestDiszipline(studentsList);

    system("pause");
    return 0;
}

/////////////////////////////////Laba4.h

#pragma once

extern char* fileName;
extern int studentsCount;

struct student {
    char Name[12];
    int Group,
        Math,
        Phys,
        Prog;
};

student* getStudentsFromFile();
void printStudentInformation(student Students);
int countStudentsValue();
void printStudentsInformation(student* TempStudent);
void calculateAndPrintAvgMarkMore4(student* Students);
void calculateAndPrintTheBestDiszipline(student* Students);

/////////////////////////////////Laba4.cpp

#include "Laba4.h"
#include <iostream>
#include <string.h>
#include <stdio.h>
#include <math.h>

#pragma warning(disable : 4996)

char* fileName = "Students.txt";
int studentsCount = countStudentsValue();

student* getStudentsFromFile() {
    student* studentsList = new student[studentsCount];
    FILE* file = fopen(fileName, "rt");
    if (!file) {
        std::cout << "File not found!\n";
        system("PAUSE");
        exit(0);
    }
    for (int i = 0; i < studentsCount; i++) {
        fscanf(file, "%s%d%d%d%d;",
            studentsList[i].Name,
            &studentsList[i].Group,
            &studentsList[i].Math,
            &studentsList[i].Phys,
            &studentsList[i].Prog);
    }
    fclose(file);
    return studentsList;
}

void printStudentsInformation(student* Students) {
    for (int i = 0; i < studentsCount; i++) {
        printStudentInformation(Students[i]);
    }
}

void printStudentInformation(student TempStudent) {
    std::cout << TempStudent.Name << " "
        << TempStudent.Group << " "
        << TempStudent.Math << " "
        << TempStudent.Phys << " "
        << TempStudent.Prog << ";\n";
}

int countStudentsValue() {
    FILE* file = fopen(fileName, "rt");
    if (!file) {
        std::cout << "File not found!\n";
        system("PAUSE");
        exit(0);
    }
    int studentsCount = 0;
    while (true) {
        char buffer = ' ';
        if (feof(file)) {
            break;
        }
        fread(&buffer, sizeof(char), 1, file);
        if (buffer == ';')  studentsCount++;
    }
    fclose(file);
    return studentsCount;
}

void calculateAndPrintAvgMarkMore4(student* Students) {
    for (int i = 0; i < studentsCount; i++) {
        double avg = (Students[i].Math + Students[i].Phys + Students[i].Prog) / 3.0;
        avg = round(avg * 10) / 10.;
        if (avg >= 4.0) {
            std::cout << Students[i].Name << " has " << avg << std::endl;
        }
    }
}

void calculateAndPrintTheBestDiszipline(student* Students) {
    int Math = 0;
    int Phys = 0;
    int Prog = 0;
    for (int i = 0; i < studentsCount; i++) {
        Math += Students[i].Math;
        Phys += Students[i].Phys;
        Prog += Students[i].Prog;
    }
    if (Math > Phys) {
        if (Prog > Math) {
            std::cout << "Programm\n";
        }
        else {
            std::cout << "Mathematik\n";
        }
    }
    else if (Prog > Phys) {
        std::cout << "Programm\n";
    }
    else {
        std::cout << "Physik\n";
    }
}