Variable declaration problem

Question

I am working on QuickSort Console Application as i made quicksort function public static void Main(string[] args) { **************************************** int[] arr; int hi, lo = 0; getArray(arr); Sort(lo, hi,arr); //The problem lies here it is giving error on variable "hi" as how to determine its the last number in array *********************************** } public static void getArray(int [] arr) { try { int i; for (i = 0; i <= arr.Length; i++) { Console.WriteLine("Enter the numbers to sort:" +arr[i]); } } catch(Exception e) { Console.WriteLine("{0} Exception caught.", e); } displayArr(arr); } public static void displayArr(int [] arr) { for (int i = 0; i <= arr.Length; i++) { Console.Write("Sorted:" +arr[i]); } } // Please help me in this. Thanks,

Mike Gold · Answer

It should copy out of VS.NET 8.0 cleanly. If not, I suggest using a front page editor or equivalent HTML editor which will make sure the paragraph and line break html tags are maintained

shah · Answer

Now i have another problem when i get an array using [code] getArray(int [] arr) for (i = 0; i = hi) { return; } Console.WriteLine(pivot); do { while (arr[i] pivot) // when it comes here it says Array // out of bound problem j--; if (i < j) { int temp = a[i]; a[i] = a[j]; a[j] = temp; } } while(i < j ); // end of do condition if (lo < j) quicks(lo, j,arr); if (i < hi) quicks(i, hi,arr); [/code] Please help me in correcting quicksort function

shah · Answer

One more thing how to make clean code on this forum. I mean how to put in a right manner the code. What tags are used for that?

shah · Answer

Thanks a million. Thank You very much Mike. That has been sorted

Mike Gold · Answer

I believe this is what you want to do...(sorting, however, will have to be your challenge ). Your for loops were overrunning the array. You had -Mike G using System ; class testMe { public testMe () { } public void TestIt ( string [] args ) { int [] arr = {0, 1, 2, 3}; int hi , lo = 0; getArray ( arr ); Console . WriteLine ( "Before Sorting..." ); // Sort(lo, hi, arr); Console . WriteLine ( "After Sorting..." ); displayArr ( arr ); Console . ReadLine (); //The problem lies here it is giving error on variable "hi" as how to determine its the last number in array } public void getArray ( int [] arr ) { try { int i ; for ( i = 0; i arr . Length ; i ++) { Console . WriteLine ( "Enter the numbers to sort:" ); string val = Console . ReadLine (); arr [ i ] = Convert . ToInt32 ( val ); } displayArr ( arr ); } catch ( Exception e ) { Console . WriteLine ( "{0} Exception caught." , e ); } } public void displayArr ( int [] arr ) { for ( int i = 0; i arr . Length ; i ++) { Console . Write ( "{0} " , arr [ i ]); } Console . WriteLine (); } }