Is there such a thing as an array without size?-CodePudding

I am playing with C#. I try to write program that frames the quote entered by a user in a square of chars. So, the problem is... a user needs to indicate the number of lines before entering a quote. I want to remove this moment, so the user just enters lines of their phrase (each line is a new element in the string array, so I guess a program should kinda declare it by itself?..). I hope I explained clear what I meant x).

I've attached the program code below. I know that it is not perfect (for example, when entering the number of lines, I use the conversion to an integer, and if a user enters a letter, then this may confuse my electronic friend, this is a temporary solution, since I do not want to ask this x) The program itself must count these lines! x)) Though, I don't understand why the symbols on the left side are displayed incorrectly when the program displays output, but I think this also does not matter yet).

        //Greet a user, asking for the number of lines.
        Console.WriteLine("Greetings! I can put any phrase into beautiful @-square."
              "\n"   "Wanna try? How many lines in the quote: ");
        int numberOfLines = Convert.ToInt32(Console.ReadLine());

        //Asking for each line.
        string[] lines = new string[numberOfLines];
        for (int i = 0; i < numberOfLines; i  )
        {
            Console.WriteLine("Enter the line: ");
            lines[i] = Console.ReadLine();
        }

        //Looking for the biggest line
        int length = 0;

        for (int i = 0; i < numberOfLines; i  )
        {
            if (length < lines[i].Length) length = lines[i].Length;
        }

        //Starting framing
        char doggy = '@';
        char space = ' ';
        length  = 4;
        string frame = new String(doggy, length);

        Console.WriteLine(frame);
        for (int i = 0; i < numberOfLines; i  )
        {
            string result = new string(space, length - 3 - lines[i].Length);
            Console.WriteLine(doggy   space   lines[i]   result   doggy);
        }
        Console.WriteLine(frame);

        Console.ReadLine();

    }
}

}

CodePudding user response：

There is performance gap and functionality between "Generic Lists" and arrays, you can read more about cons and pros of this two objects in the internet,

for example you can use list as Dai mentioned in comment like this

List<string> list = new List<string>();
list.Add("one");
list.Add("two");
list.Add("three");

or you can use arraylist

ArrayList arraylist = new ArrayList();
arraylist.Add();

or even you can change the size of array any times but it erase data in it

int[] arr = new int[100];

there is a function called ToArray() you can use it to change generic list to array

CodePudding user response：

Your problem of the left side output is, that you add two values of char. This is not what you expect to be. You must convert the char to a string to append it to other strings:

Console.WriteLine(doggy.ToString()   space.ToString()   lines[i]   result   doggy.ToString());