计算三位整数（100~999）的水仙花数
[int]$a = 100
for($a = 100;$a -le 999;$a++){
[string]$y = $a
[string]$b = $y.Substring(0,1)
[string]$c = $y.Substring(1,1)
[string]$d = $y.Substring(2,1)
[int]$e = $b*$b*$b + ($c*$c*$c + $d*$d*$d)
if($a -eq $e){
write-output(“{0}是一个水仙花” -f $e)
}else{
continue
}
}