C# 当我调整数组大小时，为什么索引超出了数组的边界？

这是我正在做的程序的一小部分。我试图通过创建另一个数组手动调整数组大小，将第一个数组中的所有项目复制到第二个数组中，然后让第一个数组引用第二个数组

RoundInfo[] rounds = new RoundInfo[10];
int numRounds = 0;
RoundInfo ri;
RoundInfo[] newRI;

public void AddRound(int height, int speed)
        {
            if (numRounds >= rounds.Length) // creates a new array of RI objects if numRounds is greater than rounds.Length
            {
                newRI = new RoundInfo[numRounds + 1];
               // Console.WriteLine("numRounds: {0}   length: {1}", numRounds, rounds.Length); // me checking if the AddRound correctly increments numRounds, it does.
                //Console.WriteLine(newRI.Length);
                for (int i = 0; i < newRI.Length; i++)
                    newRI[i] = rounds[i]; // *THE PROGRAM CRASHES HERE*
                rounds = newRI;
                ri = new RoundInfo(height, speed);
                rounds[numRounds] = ri;
                numRounds++;

            }
            if (numRounds < rounds.Length) // the program goes through this fine
            {
                ri = new RoundInfo(height, speed);
                rounds[numRounds] = ri;
                numRounds++;
            }

        }

---

如果新数组较长，我不明白它为什么会崩溃。

因为当numRounds==rounds.Length时，您首先输入if。 其中10==轮数。纵向为10

曾加上

        if (numRounds >= rounds.Length) // here you're having numRounds as 10
        {
            newRI = new RoundInfo[numRounds + 1]; //here you're adding + 1 will get newRI = new RoundInfo[11]
            for (int i = 0; i < newRI.Length; i++)
                newRI[i] = rounds[i]; // *THE PROGRAM CRASHES HERE*
                                      // so in here your program will crash due to indexOutOfBOunds because newRI[11] = rounds[11];
                                      //rounds[11] is not existing
            rounds = newRI;
            ri = new RoundInfo(height, speed);
            rounds[numRounds] = ri;
            numRounds++;
        }

我不知道你在这方面的意图是什么

//如果numRounds大于rounds.Length，则创建新的RI对象数组

不可能复制数组但超过以前的数组长度。似乎您正在尝试执行newArray[oldArray.Length+1]==oldArray[oldArray.Length] 你不能这样做，因为它真的会越界

newArray[11]不能包含oldArray[11]，因为它不存在

您可以尝试的是旧数组的长度，而不是新数组的长度

for (int i = 0; i < rounds.Length; i++)
            newRI[i] = rounds[i]; 

---

纽瑞可以去纽瑞，但不是老的。列表不需要这些，即使您必须使用数组，也有array.copy谢谢！我能修好它！

for (int i = 0; i < rounds.Length; i++)
            newRI[i] = rounds[i];