文章结束给大家来个程序员笑话:[M]
先吐个槽吧,公司也有这个算法,看了半天也不知道干什么呢,写的非常复杂,偶尔的发明一个算法,巧小而精细,上面具体述叙:
* 可以配匹0个或0个以上的字符
?可以配匹一个字符
这个算法应用的是递归的算法,开始心担如果字符串长过的话,会因递归起引栈的溢出,还好在网上查了一下,win32默许的递归栈巨细是2M,这足以行进很长字符串的配匹。
上面是心核的代码,路思都在代码的注释中,上面给出代码:
每日一道理
成功的花朵开放在啊勤劳的枝头,失败的苦果孕育在懒惰的温床之中。
成功的花朵开放在啊勤劳的枝头,失败的苦果孕育在懒惰的温床之中。
#include<iostream>
#include<string>
using namespace std;
bool match(char *pattern, char *content) {
// if we reatch both end of two string, we are done
if ('\0' == *pattern && '\0' == *content)
return true;
/* make sure that the characters after '*' are present in second string.
this function assumes that the first string will not contain two
consecutive '*'*/
if ('*' == *pattern && '\0' != *(pattern + 1) && '\0' == *content)
return false;
// if the first string contains '?', or current characters of both
// strings match
if ('?' == *pattern || *pattern == *content)
return match(pattern + 1, content + 1);
/* if there is *, then there are two possibilities
a) We consider current character of second string
b) We ignore current character of second string.*/
if ('*' == *pattern)
return match(pattern + 1, content) || match(pattern, content + 1);
return false;
}
void test(char *pattern, char *content) {
if (NULL == pattern || NULL == content)
puts("no");
match(pattern, content) ? puts("yes") : puts("no");
}
int main(int argc, char *argv[]) {
test("g*ks", "geeks"); // Yes
test("ge?ks*", "geeksforgeeks"); // Yes
test("g*k", "gee"); // No because 'k' is not in second
test("*pqrs", "pqrst"); // No because 't' is not in first
test("abc*bcd", "abcdhghgbcd"); // Yes
test("abc*c?d", "abcd"); // No because second must have 2 instances of 'c'
test("*c*d", "abcd"); // Yes
test("*?c*d", "abcd"); // Yes
cin.get();
return 0;
}
文章结束给大家分享下程序员的一些笑话语录: 某程序员对书法十分感兴趣,退休后决定在这方面有所建树。花重金购买了上等的文房四宝。一日突生雅兴,一番磨墨拟纸,并点上了上好的檀香,颇有王羲之风 范,又具颜真卿气势,定神片刻,泼墨挥毫,郑重地写下一行字:hello world.