. net_ to print a triangle of the specified number of lines with a console program (interview questions)

Below is a 4-row inverted triangle pattern consisting of an * number. Requirements:

1. Enter the number of rows in the inverted triangle, the number of rows of 3-21, for illegal rows, ask to throw the hint "illegal number of rows!" ”；

2. Print the inverted triangle on the screen that specifies the number of rows.

*******

*****

***

*

 Static voidMain (string[] args) {             while(true)            {                intK =1; Console.WriteLine ("Please enter the number of lines"); intnum =Convert.ToInt32 (Console.ReadLine ());  while(Num <3|| num > +) {Console.WriteLine ("input Error, please enter line number from new"); Num=Convert.ToInt32 (Console.ReadLine ()); }                intnum2 =num;  for(inti = num; i >0; i--)                {                    if(num2 = =i) { for(intj =0; J < i*2-1; J + +) {Console.Write ("*"); } console.write ("\ r \ n"); }                    Else                    {                         for(intj =0; J < K; J + +) {Console.Write (" "); } k++;  for(intD =0; D < i*2-1; d++) {Console.Write ("*"); } console.write ("\ r \ n");        }}} Console.readkey (); }

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. net_ to print a triangle of the specified number of lines with a console program (interview questions)