2. 编程序，使用如下所谓的简单变量“数据平移”方法来求出Fibonacci数列的第n项（的具体项值）

并显示在屏幕上（正整数n通过键盘输入）：说明变量old1=1，old2=1，newItem；新的Fibonacci项newItem总是“距它最近”的前两项（old1与old2）的累加和。而后通过“old1=old2 old2=newItem ”进行所谓的“数据平移”。接着计算另一个新的Fibonacci项newItem，依次循环，直到求出数列的第n项时为止。

-2. A program, use the following simple variable called " data translation"　method to calculate the first n Fibonacci sequence item (the value of the specific items) and display on the screen (a positive integer n the keyboard input): Descr iption of variables old1 = 1 , old2 = 1, newItem　new Fibonacci item newItem always " away from it recently,"　the first two (old1 and old2) and cumulative. Then through " old1 = old2　old2 = newItem "　so-called " data translation."　Then another new Fibonacci calculation item newItem, in cycles, until the find the series until the first n items.