《Programming Abstractions in C》学习第72天，p283-p292总结，总计10页。

一、技术总结

1、anylasis of algorithms

算法分析——即判断程序的效率(efficiency)。

2、mathematical induction(数学归纳法)

3、Big-O notation(大O标记法)

4、constant time(常量时间)

5、linear time(线性时间)

p292, The computational complexity of the part of the Average function is O(N), which is commonly called linear time。

double Average(double array[], int n) {
    int i;
    double total;

    total = 0;
    for (i = 0; i < n; i++) {
        total += array[i];
    }
    return total / n;
}

二、英语总结

1、mission是什么意思？

答：c. any work that sb believes it is their duty to do(工作，任务)。p285, Your mission is to write a function SortIntegerArray(array, n) that rearranges the elements into ascending order。

2、proportional是什么意思？

答：

(1)A is proportional to B(A与B成正比)。示例：p287, Thus, the time required on the first cycle of the loop is presumably proportional to N。

3、dominate是什么意思？

答：*dem-("house, household"), vt. to be more import, powerful, or successful than other.p291, As N increases, the term involving N^2 quickly dominates the term involving N。虽然dominate的主要意思是“控制，占据主导地位”，但是翻译时比较灵活，这里可翻译为“超过”。

三、其它

无。

四、参考资料

1. 编程

(1)Eric S.Roberts，《Programming Abstractions in C》：https://book.douban.com/subject/2003414

2. 英语

(1)Etymology Dictionary：https://www.etymonline.com

(2) Cambridage Dictionary：https://dictionary.cambridge.org

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