不确定如何将随机数写入数组

本文关键字：数组 随机数 不确定 | 更新日期: 2023-09-27 18:10:31

我是c#新手，不完全了解如何将值存储到数组中。我的代码需要随机生成降雨量值，最大数量为28mm。它在任何一天都有25%的几率发生。我目前得到一个错误'不能隐式转换类型'int'到'int[]'。我打算把数字插入每个月的每一天。如有任何帮助，我将不胜感激。

class Program {        
    enum Months {January = 1, February, March, April, May, June, July, 
                 August, September, October, November, December}        
    static int[] daysInMonth = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    const int MONTHS_IN_YEAR = 12;
    static void Main(string[] args) 
    {
       int[][] rainfall = new int[MONTHS_IN_YEAR] [];
       Welcome();
       ExitProgram();
    }//end Main
    static void Welcome() {
        Console.WriteLine("'n'n't Welcome to Yearly Rainfall Report 'n'n");
    }//end Welcome
    static void ExitProgram() {
        Console.Write("'n'nPress any key to exit.");
        Console.ReadKey();
    }//end ExitProgram
    static void GetRainfall(int[] daysInMonth, string[] Months, int[][] rainfall)
    {
        Random chanceOfRain = new Random(3);
        Random rainfallAmount = new Random(28);
        int j;
        for (int i = 0; i < daysInMonth.Length; i++)
        {
            j = chanceOfRain.Next(3);
            if (j == 0)
            {
                rainfall[i] = rainfallAmount.Next(28);
            }
        }
    }//end ChanceOfRain

不确定如何将随机数写入数组

您将rainfall定义为二维数组，因此rainfall[i]是int[]的数组。您正在尝试使用int

分配此数组。
  rainfall[i] = rainfallAmount.Next(28);

应该是这样的:

 rainfall[i][j] = rainfallAmount.Next(28);
eaxmple

。

不要忘记在使用数组之前初始化数组的每一行:

rainfall[i][j] = new int[5]; // if you want 5 elements

我想你需要这个:

static void GetRainfall(int[] daysInMonth, string[] Months, int[][] rainfall)
{
    Random chanceOfRain = new Random(3);
    Random rainfallAmount = new Random(28);
    int j;
    for(int m = 0; m < MONTHS_IN_YEAR; m++)
    { 
       rainfall[m] = new int[daysInMonth.Length];
       for (int i = 0; i < daysInMonth.Length; i++)
       {
           j = chanceOfRain.Next(100);
           if (j < 25)//25% chance
           {
               rainfall[m][i] = rainfallAmount.Next(28);
           }
       }
    }
}//end ChanceOfRain

代码遍历月份并初始化当月的数组，该数组的天数为该月的天数。然后它逐日迭代并生成值。

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