Programming abstractions in C阅读笔记：p179-p180

news2024/11/20 11:23:55

《Programming Abstractions In C》学习第60天，p179-p180总结。

一、技术总结

1.palindrome(回文)

(1)包含单个字符的字符串(如"a")，或者空字符串(如" ")也是回文。

(2)示例：“level”、“noon”。

2.predicate function

(1)predicate的意思

pre-(“forth”) + *deik-(“show”)，“that which is said of subject(关于某个东西的论述)”。也有“vt. to say sth that is true(断言)”之意。

(2) predicate function

Predicate function is function that returen True or False。

(3)示例

// predicate function示例: IsPalindrome()就是一个predicate function
bool IsPalindrome(string str) {
    int len;

    len = StringLength(str);
    if (len <= 1) {
        return TRUE;
    } else {
        return (IthChar(str, 0) == IthChar(str, len - 1)
                && IsPalindrome(SubString(str, 1, len - 2)));
    }

}

二、英语总结

1.palindrome是什么意思？

答：palin(“back”) + drome(“a running”)。c. a word that reads the same forward and backward(回文)。

2.dentically是什么意思？

答：

(1)identically < identical: adv. in a way that is excatly the way。

(2)identical < identity: adj. exactly the same(完全相同)。

(3)identity: idem-(“the same”), used to avoid repetition in writing。u. the fact of being or feeling the same。

(4)identify: regard as the same(识别)。vt. to recognize sth and prove what that thing is。

3.revised是什么意思？

答：

p180，The revised implementation of Palindrome appears in Figure4-4。

(1)revised < revise: adj. changed in someway(经过修改的)。

(2)revise： re-(“repitition”) + videre(“to see”)，即“to look at again”，后面逐渐引申为“to look over again with intent to to improve or amend(为了改进或修正而重新审视)”。look over: to quickly examine。