As to why one uses pointers to pointers: 1  The name of an array usually yields the address of its first element. 2  Even though an array of strings sounds one-dimensional, it is in fact two-dimensional, since strings are character arrays. 3  A function f will need to accept an argument of type t ** if it is to alter a variable of type t *.
How to Use a Clinometer. A clinometer is used to measure angles. This is the method used by foresters to measure the height of a tree. The clinometer only works for measuring height when the observer is standing exactly one chain length away from the tree (66â or 100 links).
Trees over 200 feet (60 m) are common, and many are over 300 ft (90 m). The current tallest tree is the Hyperion tree, measuring 379.3 ft (115.61 m). The tree was discovered in Redwood National Park during the summer of 2006 by Chris Atkins and Michael Taylor, and is thought to be the world's tallest living organism.