C# 数组值不变吗?
由于某些原因,这不会编辑输入到其中的数组的大小,并且不会将数据添加到输入的数组中C# 数组值不变吗?,c#,C#,由于某些原因,这不会编辑输入到其中的数组的大小,并且不会将数据添加到输入的数组中 public static void RandomizeArray(int[] array) { int intRead; int intReadSeed; Random randomNum = new Random(); Console.WriteLine("How many ints do you want to randomly
public static void RandomizeArray(int[] array)
{
int intRead;
int intReadSeed;
Random randomNum = new Random();
Console.WriteLine("How many ints do you want to randomly generated?");
intRead = Convert.ToInt32(Console.ReadLine());
array = new int[intRead];
Console.WriteLine("What's the maximum value of the randomly generated ints?");
intReadSeed = Convert.ToInt32(Console.ReadLine());
for (int i = 0; i < intRead; i++)
{
array[i] = (randomNum.Next(intReadSeed));
}
Console.WriteLine("Randomization Complete.\n");
}
publicstaticvoidrandomizarray(int[]数组)
{
int intRead;
int-intReadSeed;
随机数=新随机数();
WriteLine(“您希望随机生成多少整数?”);
intRead=Convert.ToInt32(Console.ReadLine());
数组=新整数[intRead];
WriteLine(“随机生成的int的最大值是多少?”);
intReadSeed=Convert.ToInt32(Console.ReadLine());
for(inti=0;i
当您将数组传递给此方法时,您通过值传递它-也就是说,您创建了一个全新的变量,该变量也指向相同的对象。如果在方法中编辑变量array
,使其指向新数组,则不会使另一个变量指向新数组-它仍然指向旧数组。因此,当您返回时,您尚未对传入的数组进行任何编辑
要解决此问题,返回数组方法末尾的code>,并将签名从void
更改为int[]
。或者您可以将int[]array
作为参数,这样您就可以通过引用传递并对其进行编辑。当您将数组传递给此方法时,您可以通过值传递它-也就是说,您创建了一个全新的变量,该变量也指向同一对象。如果在方法中编辑变量array
,使其指向新数组,则不会使另一个变量指向新数组-它仍然指向旧数组。因此,当您返回时,您尚未对传入的数组进行任何编辑
要解决此问题,返回数组方法末尾的code>,并将签名从void
更改为int[]
。或者您可以将out int[]array
作为参数,这样您就可以通过引用传递并对其进行编辑。简单修复将参数声明为out
public static void RandomizeArray(out int[] array)
{
int intRead;
int intReadSeed;
Random randomNum = new Random();
Console.WriteLine("How many ints do you want to randomly generated?");
intRead = Convert.ToInt32(Console.ReadLine());
array = new int[intRead];
Console.WriteLine("What's the maximum value of the randomly generated ints?");
intReadSeed = Convert.ToInt32(Console.ReadLine());
for (int i = 0; i < intRead; i++)
{
array[i] = (randomNum.Next(intReadSeed));
}
Console.WriteLine("Randomization Complete.\n");
}
但是,最好只返回一个数组
public static int[] GenerateRandomizedArray()
{
int intRead;
int intReadSeed;
Random randomNum = new Random();
Console.WriteLine("How many ints do you want to randomly generated?");
intRead = Convert.ToInt32(Console.ReadLine());
var array = new int[intRead];
Console.WriteLine("What's the maximum value of the randomly generated ints?");
intReadSeed = Convert.ToInt32(Console.ReadLine());
for (int i = 0; i < intRead; i++)
{
array[i] = (randomNum.Next(intReadSeed));
}
Console.WriteLine("Randomization Complete.\n");
return array;
}
public static int[]GenerateRandomizedArray()
{
int intRead;
int-intReadSeed;
随机数=新随机数();
WriteLine(“您希望随机生成多少整数?”);
intRead=Convert.ToInt32(Console.ReadLine());
变量数组=新整数[intRead];
WriteLine(“随机生成的int的最大值是多少?”);
intReadSeed=Convert.ToInt32(Console.ReadLine());
for(inti=0;i
简单修复将参数声明为out
public static void RandomizeArray(out int[] array)
{
int intRead;
int intReadSeed;
Random randomNum = new Random();
Console.WriteLine("How many ints do you want to randomly generated?");
intRead = Convert.ToInt32(Console.ReadLine());
array = new int[intRead];
Console.WriteLine("What's the maximum value of the randomly generated ints?");
intReadSeed = Convert.ToInt32(Console.ReadLine());
for (int i = 0; i < intRead; i++)
{
array[i] = (randomNum.Next(intReadSeed));
}
Console.WriteLine("Randomization Complete.\n");
}
但是,最好只返回一个数组
public static int[] GenerateRandomizedArray()
{
int intRead;
int intReadSeed;
Random randomNum = new Random();
Console.WriteLine("How many ints do you want to randomly generated?");
intRead = Convert.ToInt32(Console.ReadLine());
var array = new int[intRead];
Console.WriteLine("What's the maximum value of the randomly generated ints?");
intReadSeed = Convert.ToInt32(Console.ReadLine());
for (int i = 0; i < intRead; i++)
{
array[i] = (randomNum.Next(intReadSeed));
}
Console.WriteLine("Randomization Complete.\n");
return array;
}
public static int[]GenerateRandomizedArray()
{
int intRead;
int-intReadSeed;
随机数=新随机数();
WriteLine(“您希望随机生成多少整数?”);
intRead=Convert.ToInt32(Console.ReadLine());
变量数组=新整数[intRead];
WriteLine(“随机生成的int的最大值是多少?”);
intReadSeed=Convert.ToInt32(Console.ReadLine());
for(inti=0;i
注意:您应该使用randomNum.Next(intReadSeed+1)
,否则最大值将比intReadSeed
小一个。注意:您应该使用randomNum.Next(intReadSeed+1)
,否则最大值将比intReadSeed
小一个。在这种情况下,根本不使用传入数组,因此,如果选择了第一个修复,也删除了参数,如果使用了第二个修复,则写出而不是ref
,正如Romoku在回答中所建议的那样。在这种情况下,写出int[]数组或只返回一个值更有效?@user1067625它们同样有效,但是大多数方法都返回而不是out
out
通常仅用于从方法“返回”多个对象的情况。在这种情况下,根本不使用传入数组,因此如果选择了第一个修复,也删除参数,如果使用了第二个修复,则写入out
而不是ref
,如Romoku在回答中所建议的那样。在这种情况下,执行int[]数组还是只返回一个值更有效?@user1067625它们同样有效,但大多数方法都执行返回
而不是输出
out
通常仅用于从方法“返回”多个对象的情况。