求数组的和
using System;
//求一个数组的和
public class SampleClass
{
public int GetSum(int[] arr)
{
int sum = 0;
if(arr==null)
{
sum = 0;
}
if (arr.Length==1)
{
sum=arr[0];
}
else
{
for (int i = 0; i < arr.Length; i++)
{
sum = sum + arr[i];
}
return sum;
}
}
public static void Main()
{
int[] arr = {1,2,3};
SampleClass sc = new SampleClass();
Console.WriteLine(sc.GetSum(arr));
}
}