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).
Medium-Size Definitions. According to the Arbor Day Foundation, medium-sized trees grow in a height range of 30 to 70 feet. The Morton Arboretum, on the other hand, classified intermediate-sized trees as those reaching between 25 and 40 feet in height. To the Sacramento Tree Foundation, a medium-sized tree is 25 to 46 feet tall.