//Contains the interpolation search algorithm
public static void InterpolationSearch(float[] array, float toFind, int low, int high)
{
int boundaryCode = 0;
int mid = 0;
while (low <= high && toFind >= array[low] && toFind <= array[high])
{
//The midpoint of the array is found by estimating where the value being searched for should lie within the array, assuming equal distribution
mid = (int)Math.Round(low + (((double)(high - low) / (array[high] - array[low])) * (toFind - array[low])));
//If the value at the midpoint is equal to the value being searched for, tell the user and find other instances of the value
if (array[mid] == toFind)
{
Console.WriteLine("Value {0} found at index {1}", toFind, mid);
GenericSearchingAlgorithms.FindOtherInstances(array, toFind, mid);
}
//If the value at the midpoint is less than the value being searched for, change the low index so that the left side of the array is effectively discarded
if (array[mid] < toFind)
{
low = mid + 1;
}
//Otherwise, discard the right side of the array
else
{
high = mid - 1;
}
iterations++;
}
//If the value is not found in the array at all, tell the user and get the closest value in the array
if (array[mid] != toFind)
{
Console.WriteLine("Value {0} not found in dataset. ", toFind);
boundaryCode = -1;
GenericSearchingAlgorithms.GetClosestValue(array, mid, toFind, boundaryCode);
}
else if (toFind > array[array.Length - 1])
{
boundaryCode = 1;
GenericSearchingAlgorithms.GetClosestValue(array, mid, toFind, boundaryCode);
}
else if (toFind < array[0])
{
boundaryCode = 0;
GenericSearchingAlgorithms.GetClosestValue(array, mid, toFind, boundaryCode);
}
}
//Contains the binary search algorithm
public static void BinarySearch(float[] array, float toFind, int left, int right)
{
int boundaryCode = 0;
//If the value is not out of range of the array, but it is not found in the array, find the closest value using boundary code -1
if (left > right)
{
boundaryCode = -1;
GenericSearchingAlgorithms.GetClosestValue(array, left - 1, toFind, boundaryCode);
return;
}
//If the value being searched for is less than the leftmost value in the array, find the closest value using boundary code 0
if (toFind < left)
{
boundaryCode = 0;
GenericSearchingAlgorithms.GetClosestValue(array, left, toFind, boundaryCode);
return;
}
//If the value being searched for is greater than the rightmost value in the array, find the closest value using boundary code 1
else if (toFind > right)
{
boundaryCode = 1;
GenericSearchingAlgorithms.GetClosestValue(array, right, toFind, boundaryCode);
return;
}
//The midpoint between the current left and right indexes are found (initially set to 0, and the length of the array - 1)
int mid = (int)Math.Floor((double)right + left / 2);
//If the value is found at the midpoint, tell the user and find any other instances
if (toFind == array[mid])
{
Console.WriteLine("\nValue {0} found at index {1}. ", toFind, mid);
GenericSearchingAlgorithms.FindOtherInstances(array, toFind, mid);
}
//If the value being searched for is less than the midpoint, 'discard' the right side of the array and perform a binary search on the left side
else if (toFind < array[mid])
{
BinarySearch(array, toFind, left, mid - 1);
}
//If the value being searched for is greater than the midpoint, 'discard' the left side of the array and perform a binary search on the right side
else
{
BinarySearch(array, toFind, mid + 1, right);
}
iterations++;
}
