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

int luku;
char option;

int main(void)
{
    do
    {
        system("cls");
        printf("Anna luku, jonka kertotaulun haluat laskea, 0 lopettaa ohjelman.\n\nSyota luku: ");
        scanf("%i", &luku);

        if (luku >= 1 && luku <= 10)
        {

        switch(luku)
        {

        case 1:
            printf("--------------------------------\n");
            printf("Luvun 1 kertotaulu on:\n");
            printf("1 x 1 = 1.\n");
            printf("1 x 2 = 2.\n");
            printf("1 x 3 = 3.\n");
            printf("1 x 4 = 4.\n");
            printf("1 x 5 = 5.\n");
            printf("1 x 6 = 6.\n");
            printf("1 x 7 = 7.\n");
            printf("1 x 8 = 8.\n");
            printf("1 x 9 = 9.\n");
            printf("1 x 10 = 10.\n");

            printf("\n");
            printf("Paina jotakin nappia jatkaaksesi..\n");
            option = getche();
            break;

        case 2:
            printf("--------------------------------\n");
            printf("Luvun 2 kertotaulu on:\n");
            printf("2 x 1 = 2.\n");
            printf("2 x 2 = 4.\n");
            printf("2 x 3 = 6.\n");
            printf("2 x 4 = 8.\n");
            printf("2 x 5 = 10.\n");
            printf("2 x 6 = 12.\n");
            printf("2 x 7 = 14.\n");
            printf("2 x 8 = 16.\n");
            printf("2 x 9 = 18.\n");
            printf("2 x 10 = 20.\n");

            printf("\n");
            printf("Paina jotakin nappia jatkaaksesi..\n");
            option = getche();
            break;

        case 3:
            printf("--------------------------------\n");
            printf("Luvun 3 kertotaulu on:\n");
            printf("3 x 1 = 3.\n");
            printf("3 x 2 = 6.\n");
            printf("3 x 3 = 9.\n");
            printf("3 x 4 = 12.\n");
            printf("3 x 5 = 15.\n");
            printf("3 x 6 = 18.\n");
            printf("3 x 7 = 21.\n");
            printf("3 x 8 = 24.\n");
            printf("3 x 9 = 27.\n");
            printf("3 x 10 = 30.\n");

            printf("\n");
            printf("Paina jotakin nappia jatkaaksesi..\n");
            option = getche();
            break;

        case 4:
            printf("--------------------------------\n");
            printf("Luvun 4 kertotaulu on:\n");
            printf("4 x 1 = 4.\n");
            printf("4 x 2 = 8.\n");
            printf("4 x 3 = 12.\n");
            printf("4 x 4 = 16.\n");
            printf("4 x 5 = 20.\n");
            printf("4 x 6 = 24.\n");
            printf("4 x 7 = 28.\n");
            printf("4 x 8 = 32.\n");
            printf("4 x 9 = 36.\n");
            printf("4 x 10 = 40.\n");

            printf("\n");
            printf("Paina jotakin nappia jatkaaksesi..\n");
            option = getche();
            break;

        case 5:
            printf("--------------------------------\n");
            printf("Luvun 5 kertotaulu on:\n");
            printf("5 x 1 = 5.\n");
            printf("5 x 2 = 10.\n");
            printf("5 x 3 = 15.\n");
            printf("5 x 4 = 20.\n");
            printf("5 x 5 = 25.\n");
            printf("5 x 6 = 30.\n");
            printf("5 x 7 = 35.\n");
            printf("5 x 8 = 40.\n");
            printf("5 x 9 = 45.\n");
            printf("5 x 10 = 50.\n");

            printf("\n");
            printf("Paina jotakin nappia jatkaaksesi..\n");
            option = getche();
            break;

        case 6:
            printf("--------------------------------\n");
            printf("Luvun 6 kertotaulu on:\n");
            printf("6 x 1 = 6.\n");
            printf("6 x 2 = 12.\n");
            printf("6 x 3 = 18.\n");
            printf("6 x 4 = 24.\n");
            printf("6 x 5 = 30.\n");
            printf("6 x 6 = 36.\n");
            printf("6 x 7 = 42.\n");
            printf("6 x 8 = 48.\n");
            printf("6 x 9 = 54.\n");
            printf("6 x 10 = 60.\n");

            printf("\n");
            printf("Paina jotakin nappia jatkaaksesi..\n");
            option = getche();
            break;

        case 7:
            printf("--------------------------------\n");
            printf("Luvun 7 kertotaulu on:\n");
            printf("7 x 1 = 7.\n");
            printf("7 x 2 = 14.\n");
            printf("7 x 3 = 21.\n");
            printf("7 x 4 = 28.\n");
            printf("7 x 5 = 35.\n");
            printf("7 x 6 = 42.\n");
            printf("7 x 7 = 49.\n");
            printf("7 x 8 = 56.\n");
            printf("7 x 9 = 63.\n");
            printf("7 x 10 = 70.\n");

            printf("\n");
            printf("Paina jotakin nappia jatkaaksesi..\n");
            option = getche();
            break;

        case 8:
            printf("--------------------------------\n");
            printf("Luvun 8 kertotaulu on:\n");
            printf("8 x 1 = 8.\n");
            printf("8 x 2 = 16.\n");
            printf("8 x 3 = 24.\n");
            printf("8 x 4 = 32.\n");
            printf("8 x 5 = 40.\n");
            printf("8 x 6 = 48.\n");
            printf("8 x 7 = 56.\n");
            printf("8 x 8 = 64.\n");
            printf("8 x 9 = 72.\n");
            printf("8 x 10 = 80.\n");

            printf("\n");
            printf("Paina jotakin nappia jatkaaksesi..\n");
            option = getche();
            break;

        case 9:
            printf("--------------------------------\n");
            printf("Luvun 5 kertotaulu on:\n");
            printf("9 x 1 = 9.\n");
            printf("9 x 2 = 18.\n");
            printf("9 x 3 = 27.\n");
            printf("9 x 4 = 36.\n");
            printf("9 x 5 = 45.\n");
            printf("9 x 6 = 54.\n");
            printf("9 x 7 = 63.\n");
            printf("9 x 8 = 72.\n");
            printf("9 x 9 = 81.\n");
            printf("9 x 10 = 90.\n");

            printf("\n");
            printf("Paina jotakin nappia jatkaaksesi..\n");
            option = getche();
            break;

        case 10:
            printf("--------------------------------\n");
            printf("Luvun 10 kertotaulu on:\n");
            printf("10 x 1 = 10.\n");
            printf("10 x 2 = 20.\n");
            printf("10 x 3 = 30.\n");
            printf("10 x 4 = 40.\n");
            printf("10 x 5 = 50.\n");
            printf("10 x 6 = 60.\n");
            printf("10 x 7 = 70.\n");
            printf("10 x 8 = 80.\n");
            printf("10 x 9 = 90.\n");
            printf("10 x 10 = 100.\n");

            printf("\n");
            printf("Paina jotakin nappia jatkaaksesi..\n");
            option = getche();
            break;
        }

        }
        else if (luku == 0)
        {
            return 0;
        }

        else
        {
            system("cls");
            printf("Luku %i ei ole kelvollinen. Syota uusi luku.\n", luku);
            printf("\n");
            printf("Paina jotakin nappia jatkaaksesi..\n");
            option = getche();

        }

    } while (luku != 0);


    return 0;
}