对数组使用拆分方法时出现“索引超出范围”错误

Question

I am trying to split the data in this array, but it keeps giving me this error:

index out of bounds.

The size of the array is 10. The line of code that is creating the error is

int score = int.Parse(scoreInfo[1]);

This is the code that I have:

static void Main(string[] args)
{
    const int SIZE = 10;

    for (int j = 0; j < SIZE; j++)
    {
        // prompt the user
        Console.WriteLine("Enter player name and score on one line");
        Console.WriteLine("seperated by a space.");
        // Read one line of data from the file and save it in inputStr
        string inputStr = Console.ReadLine();
        // The split method creates an array of two strings
        string[] scoreInfo = inputStr.Split();
        // Parse each element of the array into the correct data type.
        string name = (scoreInfo[0]);
        int  score = int.Parse(scoreInfo[1]);
        if (inputStr == "")
        {
            Console.WriteLine(scoreInfo[j]);
        }
    }

    Console.ReadLine();
}

Answer 1

I tried your code using a constant, something like "Guy 19". The .Split() method will break up your input string based on spaces. If you're not entering a space followed by a number, then your scoreInfo[1] will be empty and parsing will fail.

Try adding a break point after your .Split() to determine if scoreInfo is correctly split into a size 2 array, with [0] being the name of the player and [1] being an integer score. If you're entering a name like "FirstName LastName 20" then the information at position [1] is not going to be an integer and the parsing will also fail.

Your for-loop is sort of puzzling, are you looping through 10 times for a team of 10 players? You could put your dialog in a while loop and break out when parsing fails or the user types something like "exit".

Answer 2

A few things of note. You are using SIZE to denote how many iterations your loop should make. It is not the size of your array. Your array is only going to be large as the split makes it. If you split with a space as the delimiter, you're going to have 2 objects in the array at indices 0 and 1.

That last section where you're saying to write scoreInfo[j] will fail as soon as j is larger than 1.