KI-19-1-20

#include <stdlib.h>
#include <windows.h>
#include <stdio.h>
#include <conio.h>
#include <math.h>

void print(int hr, int mn) {
    char mas[40][40] = {0};
    char rnd[40][81];
    double x, y;

    for (int i = 0; i < 360; i += 30) {
        x = sin(i*3.14 / 180.0)*15.0;
        y = cos(i*3.14 / 180.0)*15.0;

        x += 20.5;
        y += 20.5;

        mas[(int)x][(int)y] = 1;
    }


    hr *= 360 / 12;
    hr += mn * 360 / 60 / 12;
    hr -= 90;
    for (double len = 0; len <= 8.0; len += 0.5) {
        x = sin(hr*3.14 / 180.0)*len;
        y = cos(hr*3.14 / 180.0)*len;

        x += 20.5;
        y += 20.5;


        mas[(int)x][(int)y] = 2;
    }

    mn *= 360 / 60;
    mn -= 90;
    for (double len = 0; len <= 13.0; len += 0.5) {
        x = sin(mn*3.14 / 180.0)*len;
        y = cos(mn*3.14 / 180.0)*len;

        x += 20.5;
        y += 20.5;


        mas[(int)x][(int)y] = 2;
    }


    for (int i = 0; i < 40; i++) {
        for (int j = 0; j < 40; j++) {
            if (mas[i][j] == 1) {
                rnd[i][j * 2] = '-';
                rnd[i][j * 2 + 1] = '-';
            }
            else if (mas[i][j] == 2) {
                rnd[i][j * 2] = '*';
                rnd[i][j * 2 + 1] = '*';
            }
            else {
                rnd[i][j * 2] = ' ';
                rnd[i][j * 2 + 1] = ' ';
            }

        }
        rnd[i][80] = '\n';
    }
    rnd[39][80] = '\0';

    system("cls");
    for (int i = 0; i < 40; i++) {
        puts(rnd);
    }
}

double abs_dbl(double a) {
    if (a < 0)
        return -a;
    return a;
}

//4
//-------------------------------------------------------
void m_strcat(char* s, char* t, int n) {
    int i = 0;
    int j = 0;

    while (s[i] != '\0') {
        i++;
    }

    while (t[j] != '\0' && j < n) {
        s[i] = t[j];
        i++;
        j++;
    }

    s[i] = '\0';
}

//5
//-------------------------------------------------------
int multiply(int a, int b) {
    return multiply_r(a, b, 0);
}

int multiply_r(int a, int n, int ans) {
    if (n)
        return multiply_r(a, --n, ans + a);
    return ans;
}

int main() {
    int h = 0;
    int m = 0;
    int m_count = 0;

    printf("Hour: ");
    scanf("%i", &h);

    printf("Min: ");
    scanf("%i", &m);

    if (h >= 0 && h < 12 && m >= 0 && m < 60) {
        print(h, m);
        _getch();

        double h_ang = h * 360.0 / 12.0;
        h_ang += m * 360.0 / 12.0 / 60.0;
        double m_ang = m * 360.0 / 60.0;

        while (abs_dbl(h_ang - m_ang) > 360.0 / 60.0) {
            m_count++;
            m++;
            if (m >= 60) {
                h++;
                m = 0;
            }
            if (h >= 12)
            {
                h = 0;
            }

            print(h, m);

            h_ang = h * 360.0 / 12.0;
            h_ang += m * 360.0 / 12.0 / 60.0;

            m_ang = m * 360.0 / 60.0;

            //printf("\nAngle: %.2f", abs_dbl(h_ang - m_ang));

            Sleep(150);
        }

        printf("%i hour %i minutes passed\n", m_count / 60, m_count % 60);
    }
    else {
        printf("ERROR\n");
    }

    _getch();

    system("cls");

    char s1[256], s2[256];
    int n;

    printf("String 1: ");
    scanf("%s", &s1);

    printf("String 2: ");
    scanf("%s", &s2);

    printf("N: ");
    scanf("%i", &n);

    m_strcat(s1, s2, n);

    printf("String result: %s\n", s1);

    _getch();

    system("cls");


    int a, b;

    printf("A: ");
    scanf("%i", &a);

    printf("B: ");
    scanf("%i", &b);

    printf("%i * %i = %i\n", a, b, multiply(a, b));

    _getch();

    return 0;
}