What data type to use?

Question

C++ / C#

It sorts by number normally, and then sorting by letter is needed if the number is the same.

I use char clas[15];

for (int i = 0; i < count; i++)
                for (int j = 0; j < count; j++)
                    if (ob[i].clas[0] < ob[j].clas[0]) {
                        tem = ob[i];
                        ob[i] = ob[j];
                        ob[j] = tem;
                    }

Answer 1

Compare further third characters in strings if the first ones match.
Or compare strings with strcmp.

Answer 2

for (int i = 0; i < count; i++)
                    if (ob[i].clas[0] < ob[j].clas[0]) {
                        tem = ob[i];
                        ob[i] = ob[j];
                        ob[j] = tem;
                            for (int i = 0; i < count; i++)
                                if (ob[i].clas[0] < ob[j].clas[0]) {
                                    tem = ob[i];
                                    ob[i] = ob[j];
                                    ob[j] = tem;
                    }
                    }

Answer 3

I use the string type to work with strings, you can compare them correctly within the framework of this task:

string a1 = "1-Б";
    string a2 = "1-A";

    if (a1 < a2) {
        // ...
    } else {
       // ...
    }