foreach(int n in arr) Console.WriteLine("{0}",n+" ");请问这个n+" "

foreach(int n in arr) Console.WriteLine("{0}",n+" ");请问这个n+" "
foreach(int n in arr) Console.WriteLine("{0}",n+" ");请问这个n+" "

foreach(int n in arr) Console.WriteLine("{0}",n+" ");请问这个n+" "
因为Console.WriteLine(param);param必须为string类型,int + ""也就是数字加上一个空字符串,把int
转换成了string而已,也可以直接写成n.ToString()