朗文词典里algorithm的定义是：a set of instructions that are followed in a fixed order and used for solving a mathematical problem, making a computer program etc.
辗转相除求两个数的最大公约数是个极端的例子，它用不到啥数据结构。
红黑树和B树则没啥高档数学计算，尤其是和求sin(x)等相比。Wirth说算法+数据结构＝程序。绝大多数程序是二者的交织，比如把π算到一亿位，除了公式，还有存放问题。
algorithm的来历是：
Date: 1600-1700;
Origin: algorism 'algorithm' (13-19 centuries),
from Medieval Latin algorismus,
from Arabic al-khuwarizmi,
from al-Khuwarizmi 9th-century Arab mathematician;
influenced by Greek arithmos 'number'返回搜狐，查看更多