Binary search


binary search
algorithm
a search algorithm which repeatedly divides an ordered search sp-ce in half according to how the required (key) value compares with the middle element.
the following pseudo-c routine performs a binary search return the index of the element of vector “thing[first..last]” equal to “target”:
if (target thing[last]) return not_found; while (first mid = (first+last)/2; /- truncate to integer -/ if (target == thing[mid]) return mid; if (target if (target == thing[last]) return last; return not_found;
(2003-01-14)

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