printf_s("Number of equations (1-3):");
scanf_s("%d", &numeq);

while (numeq < 0 || numeq>4)
{
    printf_s("Please enter a number between 1-3.n");
    printf_s("Number of equations(1 - 3): ");
    scanf_s("%d", &numeq);

}







if (numeq == 1)
{

    printf_s("Enter equation 1:");
    fgets(equations1, sizeof(equations1), stdin);
    getchar();

    while (equations1[i] != '/0')
    {



        mekdem[p] = equations1[i];

        while (equations1[k] != 'x', 'y', 'z' || equations1[k] != '/0');

        {

            sum = equations1[k - 1] + sum * 10;
            k++;
            mekdem[p] = sum;

        }


        i = k + 2;


    }












    /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////



    if (numeq == 2)
    {

        printf_s("Enter equation 1:");
        fgets(equations1, sizeof(equations1), stdin);

        getchar();

        printf_s("Enter equation 2:");
        fgets(equations2, sizeof(equations2), stdin);

        getchar();


    }



    if (numeq == 3)
    {

        printf_s("Enter equation 1:");
        fgets(equations1, sizeof(equations1), stdin);

        getchar();

        printf_s("Enter equation 2:");
        fgets(equations2, sizeof(equations2), stdin);

        getchar();

        printf_s("Enter equation 3:");
        fgets(equations3, sizeof(equations3), stdin);

        getchar();