C algorithm on the problem of veal production

An example of C# algorithm is presented in this paper. Share to everybody for everybody reference. The specific analysis is as follows:

Question:

1 calf born, 1 calf born 4 years later, 1 calf born every year thereafter. There is one calf born. How many cows will there be in 20 years?

At first, I thought recursion was better. After a long time, I couldn't figure it out, so I came up with the following method to realize it. The number of the data, i, represents the age of cows, and the value of the array i represents how many cows there are this year

The implementation code is as follows:

const int YEAR = 50;

static void Main(string[] args)
{
  int[] yearAmount = new int[YEAR];
  yearAmount[0] = 1;
  for (int year = 1; year < YEAR; year++)
  {
 int count = 0;
 for (int i = year; i > 0; i--)
 {
   if (i >= 2)
 count += yearAmount[i]; // There are several calves 

   yearAmount[i] = yearAmount[i - 1]; // The age of the cattle +1
 }
 yearAmount[0] = count; // The calf was born 0 At the age of 
  }

  int result = yearAmount.Sum();
  Console.WriteLine("{0} In total :{1} Head of cattle ", YEAR, result);
  Console.Read();
}

Pretty fast!

Hopefully this article has helped you with your C# programming.