CompareString | Java tool to compare String objects

I am trying to sort a dictionary in alphabetical order, which consists of structures with words followed by the meaning. When I run the program, the output for the third structure reads: <

I didn't find any good solution for my issue. A bit of explanations. I have DataGridView with a few Columns. In the first Column, the cell shows the path to some file. Starting from the third Column, I have couple of ComboBoxCells.

In the DropDown of the ComboBoxes, I wish to make auto-select equal (case insensitive) values to the part of the File path in the first cell. All this happens on Form.Load.
Later, users make their own choices.

I'm testing a code to sort array in a custom alphabetic order, but for some reason each time i run the program the ordem don't sort

Main Code

I am writing a function to compare two strings (The use case is to compare a bank statement with the original string created at the moment of invoicing). I am interested to know how many percent (fraction) of the smaller string compareSting are inside the original string. At least 4 consecutive chars need to be taken into account. The order of matching does not matter.

I'm taking a specialization on Coursera and in a lesson it explains the qsort() function that sorts a given array:

void qsort(void *base, size_t nmemb, size_t size, int (*compar)(const void *, const void *));

where we should provide qsort() with four parameters - the array to sort, number of elements in the array, size of each element of the array, and a pointer to a function (compar) which takes two const void *s and returns an int. The lesson says that we need to write the compar function to be compatible with the qsort function, so if we would like to compare two strings the function should look like:

I have an array like this:

I am trying to make a Music Player program in C#. The project I am currently doing is for personal use and won't be published in public. To show you guys what I've done so far is:

UI:

This is the UI of the program, at the left there are two buttons My Music & Favourites (Which is supposed to be the most played songs). What I need help with is to sort the list items from the biggest to smallest meaning that the most played of all of them has to be first on the list (Data stored in a txt file, info provided in the what've tried section) and I am not sure how to do that with a list. Ignore the windows media player control in the bottom right, I use it to play the music files and hide on the program start.

I have a listbox control that has different songs in it, each time an item is clicked from the list, the selected item plays. I am currently saving each song's data in a .txt file. Also when the Favourites button is clicked the program clears the current list (It doesn't open a new form) and adds the data from a folder (if the song was never played before it won't have a .txt file generated so it won't be added). I managed to list the most played songs in the list. So I have a .txt file for each song that has the number of times the song was played in the first line.

Apart from that I've tried making a 2D string array which has 2 columns, song name first and number of plays as second. I've tried to sort the array but the results are not sorted when I tried to add the array items to the list.

As input i have a File containing a list of rooms. Each room has the following information: (1 line of the file)

So for my C code, I am coding a binary search tree that takes in a typedef struct called node that has char* name and char* phone. What I do in this code is that I put this in a binary search tree and output the list alphabetically with the phoneNum next to it. It works but I get the error

warning: comparison between pointer and integer

What would I do to fix this?