捕鱼和分鱼；用逆推法求EX=1+x+x.x/2!+x.x.x/3!......的值；找出一个二维数组的“鞍点”-fishing and the fish; Backstepping method used for EX x.x x = 1 / 2! x.x.x / 3 !...... value; find a two-dimensional array of the "saddle"

Iphone 2.0 programming include network andy stream to read (Ex.http://www.yahoo.com), SQL database for file read and write, Teaching you how to link network lib. Iphone SDK must use in mac os 10.5 later, and Iphone os 2.0 (apple will relea