void HistogramArray(int arr1)
{
    int i, s, num = 0; // declaring and initialize variables
    int new_arr[21] = { 0 }; // declaring and initialize a new array

    for (i = 0; i < 14; i++)
    { // start of the first loop //

        num = arr1[i]; // copy the content //
        new_arr[num] = s++; // save the amount of times that the number is written //

    } // end of the first loop //

    printf("\nValue\tHistogram\n"); // inform the user //

    for (i = 0; i < 20; i++)
    { // start of the external printing loop - printing numbers //

        if (new_arr[i] != 0)
        { // only if the numbers appeared in the original array //
            printf("\n%d\t", i); // print the numbers between 1 - 20 //

            while (new_arr[i] != 0)
            { // start of the inner printing loop - printing stars //

                printf("*");
                s--;
            } // end of the inner printing loop //
        } // end of the 'if' term //
    } // end of the external printing loop //
} // end of function //