从阶乘函数对比Javascript和C#的异同

　　　　　　　　　　　　　　　　　　
<script type="text/javascript">
function factorial(num) {
if (num <= 1) {
return 1;
} else {
return num * arguments.callee(num - 1);
}
}
var trueFactorial = factorial;
factorial = function () {
return 0;
}
alert(trueFactorial(5)); //120
alert(factorial(5)); //0
</script>

protected void Page_Load(object sender, EventArgs e)
{
TestFactorial();
}
public delegate int factorialDelegate(int num); //定义递归函数委托
private void TestFactorial()
{
factorialDelegate fdelegate = factorial; //请注意与javascript函数对比
factorialDelegate trueFactorial = fdelegate;
fdelegate = returnZero;
int num1 = trueFactorial(5); //120
int num2 = fdelegate(5); //0
}
private int returnZero(int num)
{
return 0;
}
private int factorial(int num)
{
if (num <= 1)
{
return 1;
}
else
{
return num * factorial(num - 1);
}
}