#include <stdio.h>
#include <stdlib.h>

int t19_a() {
    FILE *fp;
    int num, count_positive = 0, count_negative = 0;
    int sum_positive = 0, sum_negative = 0;
    float avg_positive = 0.0, avg_negative = 0.0;

    fp = fopen("netext_a.bin", "rb"); // Открытие бинарного файла для чтения

    if (fp == NULL) {
        printf("Ошибка открытия файла!\n");
        return 1;
    }

    while (fread(&num, sizeof(char), 1, fp) == 1) { // Чтение по 1 целому числу
        if (num > 0) {
            count_positive++;
            sum_positive += num;
        } else if (num < 0) {
            count_negative++;
            sum_negative += num;
        }
    }

    fclose(fp); // Закрытие файла

    if (count_positive > 0) {
        avg_positive = (float)sum_positive / count_positive;
    }
    if (count_negative > 0) {
        avg_negative = (float)sum_negative / count_negative;
    }

    printf("Number of positive numbers: %d\n", count_positive);
    printf("Number of negative numbers: %d\n", count_negative);
    printf("Sum of positive numbers: %d\n", sum_positive);
    printf("Sum of negative numbers: %d\n", sum_negative);
    printf("Arithmetic mean of positive numbers: %.2f\n", avg_positive);
    printf("Arithmetic mean of negative numbers: %.2f\n", avg_negative);

    return 0;
}

int t19_b() {
    FILE *fp;
    int num, count_positive = 0, count_negative = 0;
    int sum_positive = 0, sum_negative = 0;
    float avg_positive = 0.0, avg_negative = 0.0;

    fp = fopen("netext_b.bin", "rb"); // Открытие бинарного файла для чтения

    if (fp == NULL) {
        printf("Ошибка открытия файла!\n");
        return 1;
    }

    while (fread(&num, sizeof(short), 1, fp) == 1) { // Чтение по 1 целому числу
        if (num > 0) {
            count_positive++;
            sum_positive += num;
        } else if (num < 0) {
            count_negative++;
            sum_negative += num;
        }
    }

    fclose(fp); // Закрытие файла

    if (count_positive > 0) {
        avg_positive = (float)sum_positive / count_positive;
    }
    if (count_negative > 0) {
        avg_negative = (float)sum_negative / count_negative;
    }

    printf("Number of positive numbers: %d\n", count_positive);
    printf("Number of negative numbers: %d\n", count_negative);
    printf("Sum of positive numbers: %d\n", sum_positive);
    printf("Sum of negative numbers: %d\n", sum_negative);
    printf("Arithmetic mean of positive numbers: %.2f\n", avg_positive);
    printf("Arithmetic mean of negative numbers: %.2f\n", avg_negative);

    return 0;
}
int t19_v() {
    FILE *fp;
    int num, count_positive = 0, count_negative = 0;
    int sum_positive = 0, sum_negative = 0;
    float avg_positive = 0.0, avg_negative = 0.0;

    fp = fopen("netext_v.bin", "rb"); // Открытие бинарного файла для чтения

    if (fp == NULL) {
        printf("Ошибка открытия файла!\n");
        return 1;
    }

    while (fread(&num, sizeof(int), 1, fp) == 1) { // Чтение по 1 целому числу
        if (num > 0) {
            count_positive++;
            sum_positive += num;
        } else if (num < 0) {
            count_negative++;
            sum_negative += num;
        }
    }

    fclose(fp); // Закрытие файла

    if (count_positive > 0) {
        avg_positive = (float)sum_positive / count_positive;
    }
    if (count_negative > 0) {
        avg_negative = (float)sum_negative / count_negative;
    }

    printf("Number of positive numbers: %d\n", count_positive);
    printf("Number of negative numbers: %d\n", count_negative);
    printf("Sum of positive numbers: %d\n", sum_positive);
    printf("Sum of negative numbers: %d\n", sum_negative);
    printf("Arithmetic mean of positive numbers: %.2f\n", avg_positive);
    printf("Arithmetic mean of negative numbers: %.2f\n", avg_negative);

    return 0;
}
int t20() {
    FILE *fp;
    int num, count_positive = 0, count_negative = 0;
    int sum_positive = 0, sum_negative = 0;
    float avg_positive = 0.0, avg_negative = 0.0;

    fp = fopen("netext2.bin", "rb"); // Открытие бинарного файла для чтения

    if (fp == NULL) {
        printf("Ошибка открытия файла!\n");
        return 1;
    }

    while (fread(&num, sizeof(char), 1, fp) == 1) { // Чтение по 1 целому числу
        if (num > 0) {
            count_positive++;
            sum_positive += num;
        } else if (num < 0) {
            count_negative++;
            sum_negative += num;
        }
    }

    fclose(fp); // Закрытие файла

    if (count_positive > 0) {
        avg_positive = (float)sum_positive / count_positive;
    }
    if (count_negative > 0) {
        avg_negative = (float)sum_negative / count_negative;
    }

    printf("Number of positive numbers: %d\n", count_positive);
    printf("Number of negative numbers: %d\n", count_negative);
    printf("Sum of positive numbers: %d\n", sum_positive);
    printf("Sum of negative numbers: %d\n", sum_negative);
    printf("Arithmetic mean of positive numbers: %.2f\n", avg_positive);
    printf("Arithmetic mean of negative numbers: %.2f\n", avg_negative);

    return 0;
}
void main() {
	printf("a\n");
	t19_a();
	printf("b\n");
	t19_b();
	printf("v\n");
	t19_v();
	printf("20\n");
	t20();
}