#include <stdio.h>
#include <string.h>

//Global Structure
struct Team
{
    int played;
    int goalsfor;
    int goalsagainst;
    int points;
};

int main()
{

    //Structures
    struct Team teams[7] = {0};

    //Variables
    int Home, Away, Homegoals, Awaygoals;
    int i;
    char choice;

    //Team input
    do
    {
        do
        {
            printf("Home team number: ");
            scanf("%i", &Home);
            --Home;

            printf("Away team number: ");
            scanf("%i", &Away);
            --Away;

            if(Home == Away || Home < 0 || Away < 0)
            {
                printf("Please enter two different positive team numbers.\n");
            }
        } while(Home == Away || Home < 0 || Away < 0);

        //Home Team
        printf("Enter goals scored by Team %d: ", Home + 1);
        scanf_s("%i", &Homegoals);
        while(Homegoals < 0)
        { //Loops till positive number is input
            printf("Enter a positive number: ");
            scanf_s("%i", &Homegoals);
        }
        teams[Home].goalsfor += Homegoals; //Home Goals Adder
        teams[Away].goalsagainst += Homegoals; //Away Goals against adder
        teams[Home].played += 1; //Home Counter

        //Away Team
        printf("Enter goals scored by Team %d: ", Away + 1);
        scanf_s("%d", &Awaygoals);
        while(Awaygoals < 0)
        { //Loops till positive number is input
            printf("Enter a positive number: ");
            scanf_s("%d", &Awaygoals);
        }
        teams[Away].goalsfor += Awaygoals; //Away Goals Adder
        teams[Home].goalsagainst += Awaygoals; //Home Goals against adder
        teams[Away].played++; //Away Counter

        //Points
        if(teams[Home].goalsfor < teams[Away].goalsfor)
        { //Home Wins
            teams[Away].points += 3;
        }
        else if(teams[Home].goalsfor == teams[Away].goalsfor)
        { //Draw
            teams[Home].points++;
            teams[Away].points++;
        }
        else if(teams[Home].goalsfor > teams[Away].goalsfor)
        { // Away Wins
            teams[Home].points += 3;
        }

        //Table
        printf("Team        Played      For     Against     Points\n");
        for(i = 0; i < 6; i++)
        {
            printf("Team %i     %i      %i      %i      %i\n", i + 1, teams[i].played, teams[i].goalsfor,
                   teams[i].goalsagainst, teams[i].points);
        }

        //Exit Sequence
        do
        {
            printf("Exit? (Y/N): ");
            scanf_s(" %c", &choice);
            if(choice == 'y' || choice == 'Y')
            { //Ends Program
                printf("\nProgram ending\n\n");
                break;
            }
            else if(choice == 'n' || choice == 'N')
            { //Continues Program
                break;
            }
            else if(choice != 'y' && choice != 'Y' && choice != 'n' && choice != 'N')
            { //Error Message
                printf("Please enter Y/N\n");
            }
        } while(choice != 'y' && choice != 'Y' && choice != 'n' && choice != 'N');
    } while(choice == 'n' || choice == 'N');

    return 0;
}