了解求和算法 [英] Understanding a summation algorithm

问题描述

如何做下面的工作？

 数字算法1总和在阵列
功能总和（顺序）
    总之＆LT; --- 0
    对于i＆LT; ---- 1，以长度（序列）办
        点心＆LT; ---总和+序列[I]
    结束了
    回报总和
 

解决方案

它基本上是说，如果你开始在一个数组（它的第一个元素）的开始，在每一个该元素的值添加到正在运行的总时到达最后一个元素（序列的长度），你将有数组的值的总和。

 ＃这是说我们有一个叫做加法功能，它需要一个序列
功能总和（顺序）
＃这是说的0值赋给变量总和
总之＆LT; --- 0
＃这是说make变量'我'从1到序列的长度
对于i＆LT; ---- 1，以长度（序列）办
＃这是说分配总和+第i个值序列中变量总和
点心＆LT; ---总和+序列[I]
＃这表明我们正与循环完成的，因此环回顶端，或
＃继续，如果我们做循环
结束了
＃这只是返回值相加调用过程
回报总和
 

我们在这里是没有任何特定的语言。相反，它是伪code - 它的意思是看起来足够像code，以传达一种算法或其他code有关的想法，但有意意味着不能在特定的语言。通过这种方式，它更容易接近的人谁读code，而不需要他们有特定的语言知识。

How does the following work?

Algorithm 1 Sum of numbers in an Array
Function SUMMATION (Sequence)
    sum <---0
    for i <----1 to Length (Sequence) do
        Sum <--- Sum + sequence[i]
    end for
    return sum

解决方案

It's basically saying that if you start at the beginning of an array (its first element), and at every element add that element's value to a running total, when you reach the last element (the length of the sequence) you'll have the sum of the values of the array.

# This says "we have a function called SUMMATION. It requires a sequence
Function SUMMATION (Sequence)
# This says "assign the value 0 to variable 'sum'
sum <---0
# This says "make variable 'i' go from 1 to the length of the sequence"
for i <----1 to Length (Sequence) do
# This says "assign 'sum + the ith value in the sequence' to variable 'sum'
Sum <--- Sum + sequence[i]
# This indicates we're done with the loop, so loop back to the top, or
# continue on if we're done looping
end for
# This just returns the value 'sum' to the calling procedure
return sum

What we have here isn't in any particular language. Instead, it's "Pseudocode" - it's meant to look enough like code in order to convey an algorithm or other code-related idea, but is intentionally meant to not be in a particular language. In this manner, it's more readily accessible to anyone who reads code without requiring they have knowledge of a particular language.

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