外國人寫的一個class，這么一點小小的應用，除非有特殊需求，還沒有必要模塊化。 用asp產生一個隨機數。 % ''************************************************************************** '' CLASS: cRandom '' Calls randomize to seed the random number generator. '' Provides functions for returning ranged random integers or arrays of '' ranged random integers. '' Calling randomize to seed the random number generator at the time the '' class is created seemed like a reasonable thing to do. private sub Class_Initialize() '' Check the VBScript documentation for the specifics relating '' to the Randomize function Randomize end sub '' Terminate doesn''t need to do anything for this class private sub Class_Terminate() end sub ''********************************************************************** '' FUNCTION: RangedRandom '' PARAMETER: lowerBound, the lowest allowable number to return '' PARAMETER: upperBound, the highest allowable number to return '' RETURNS: A random integer between lowerBound and UpperBound, '' inclusive ''********************************************************************** public function RangedRandom( lowerBound, upperBound ) RangedRandom = CInt((upperBound - lowerBound) * Rnd + lowerBound) end function ''********************************************************************** '' FUNCTION: RangedRandomArray '' PARAMETER: lowerBound, the lowest allowable number to return '' PARAMETER: upperBound, the highest allowable number to return '' PARAMETER: arraySize, zero based number specifying the size of the array '' PARAMETER: duplicates, true or false to indicate whether duplicate '' resize the tempArray to hold the number of elements passed in the '' arraySize parameter redim tempArray(arraySize) '' This is a loop counter, set it to 0 filledElements = 0 '' loop until filledElements is equal to the arraySize + 1 do until filledElements = arraySize + 1 '' Call the RangedRandom function with the lowerBound and upperBoundparameters tempValue = RangedRandom( lowerBound, upperBound ) '' Handle the case where we don''t want duplicate values if duplicates = false then badValue = false for i = 0 to UBound(tempArray) '' check if the new random value already exists in the array '' if it does set the badValue flag to true and break out of the loop if tempValue = tempArray(i) then badValue = true exit for end if next if badValue = false then tempArray(filledElements) = tempValue filledElements = filledElements + 1 end if else '' Handle the case where duplicate values in the array are acceptable tempArray(filledElements) = tempValue filledElements = filledElements + 1 end if loop '' return the array RangedRandomArray = tempArray end function end class %> % '' All the code that follows is example code showing the use of the '' cRandom class. dim objRandom dim flip dim randomArray dim rowsToTest dim i, j '' create an instance of our class set objRandom = new cRandom '' set the number of iterations that we want to test rowsToTest = 10 '' "toggle" to determine whether or not we set the bgcolor of the table row flip = true '' Start the table Response.Write "table border=0 cellpadding=1 cellspacing=1>" for j = 0 to rowsToTest '' We''ll alternate the bgcolor of the table rows based on the '' value of the flip variable if flip then Response.Write "tr bgcolor=LightGrey>" else Response.Write "tr>" end if '' Call the RangedRandomArray function for testing purposes randomArray = objRandom.RangedRandomArray( 1, 10)
