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

int main()
{
    int rowlength,collength,row2length,col2length;
    int row=0,col=0;

    FILE* file;
    file = fopen("macierz.txt", "r");

    printf("Input number of rows for the first array!");
    scanf("%d",&rowlength);
    printf("Input number of columns for the first array!");
    scanf("%d",&collength);
    printf("Input number of rows for the second array!");
    scanf("%d",&row2length);
    printf("Input number of columns for the second array!");
    scanf("%d",&col2length);



    int tab[rowlength][collength],tab1[row2length][col2length];

    printf("Elements in the text file:\n\n");

    while( fscanf( file, "%d,", &tab[row][col] ) != EOF )  //WCZYTYWANIE WARTOŚCI Z PLIKU TXT DO 2 TABLIC
    {

        printf("%d ", tab[row][col]);

        col++;

        if(col==collength && row==rowlength-1)
        {
            printf("\n\n");
            row=0;
            col=0;

            while( fscanf( file, "%d,", &tab1[row][col] ) != EOF )
            {

                printf("%d ", tab1[row][col]);
                col++;

                if(col==col2length)

                {

                    printf("\n");
                    col=0;
                    row++;

                }
            }
        }
        if(col==collength)
        {

            printf("\n");
            col=0;
            row++;

        }
    }
    printf("\n");

    fclose(file);

    Multiplication(rowlength,collength,row2length,col2length,tab, tab1);

    return 0;
}

int Multiplication(int rowlength, int collength, int row2length, int col2length, int tab[rowlength][collength],int tab1[row2length][col2length]) // MNOŻENIE MACIERZY
{
    int i,j,k;
    int tab2[rowlength][col2length];
    printf("Result of multiplication:\n\n");

    for(i=0; i<rowlength; i++)
    {
        for(j=0; j<col2length; j++)
        {
            tab2[i][j] = 0;
            for(k=0; k<row2length; k++)
            {

                tab2[i][j] += tab[i][k] * tab1[k][j];

            }
        }
    }

    for(i=0; i<row2length; i++)
    {
        for(j=0; j<col2length; j++)
        {

            printf("%d ", tab2[i][j]);

        }
        printf("\n");
    }
    Save(row2length, col2length, tab2);
}
void Save(int row2length, int col2length, int tab2[row2length][col2length]) // ZAPISYWANIE MACIERZY WYNIKOWEJ DO PLIKU
{
    int i,j;
    FILE* file2;
    file2 = fopen("wynik.txt", "w");
    if(file2==NULL) printf("Can't open the file!");

    else
    {
        fprintf(file2,"The result: \n");

        for(i=0; i<row2length; i++)
        {
            for(j=0; j<col2length; j++)
            {

                fprintf(file2,"%d ", tab2[i][j]);

            }

            fprintf(file2,"\n");
        }

        fclose(file2);

    }
}