[摘]C/C++实现js的split函数功能

最新推荐文章于 2025-09-07 19:33:12 发布

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原文链接：http://www.cnblogs.com/KivenLin/archive/2012/10/04/2711841.html

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#c/c++ #网络

今天在网上找了一下，发觉有比较多的方法，现在列出来，需要的朋友可以参考一下。

功能最丰富的就是第一种方法了：

1 vector<string> Split(const string& s,const string& match,bool removeEmpty=false,bool fullMatch=false)
2 //参数s为需要肢解的字符串
3 //参数match为肢解匹配字符串
4 //参数removeEmpty为是否删除空字符
5 //参数fullMatch为是否只保留全匹配的字符串
6
7 下面为代码区：
8 #include <string>
9 #include
10
11 namespace Daniweb
12 {
13     using namespace std;
14
15     typedef string::size_type (string::*find_t)(const string& delim,
16                                                 string::size_type offset) const;
17
18     ///
19 /// Splits the string s on the given delimiter(s) and
20 /// returns a list of tokens without the delimiter(s)
21 ///
22 /// The string being split
23 /// The delimiter(s) for splitting
24 /// Removes empty tokens from the list
25 ///
26 /// True if the whole match string is a match, false
27 /// if any character in the match string is a match
28 ///
29 /// A list of tokens
30     vector<string> Split(const string& s,
31                          const string& match,
32                          bool removeEmpty=false,
33                          bool fullMatch=false)
34     {
35         vector<string> result;                 // return container for tokens
36         string::size_type start = 0,           // starting position for searches
37                           skip = 1;            // positions to skip after a match
38         find_t pfind = &string::find_first_of; // search algorithm for matches
39
40         if (fullMatch)
41         {
42             // use the whole match string as a key
43 // instead of individual characters
44 // skip might be 0. see search loop comments
45             skip = match.length();
46             pfind = &string::find;
47         }
48
49         while (start != string::npos)
50         {
51             // get a complete range [start..end)
52             string::size_type end = (s.*pfind)(match, start);
53
54             // null strings always match in string::find, but
55 // a skip of 0 causes infinite loops. pretend that
56 // no tokens were found and extract the whole string
57             if (skip == 0) end = string::npos;
58
59             string token = s.substr(start, end - start);
60
61             if (!(removeEmpty && token.empty()))
62             {
63                 // extract the token and add it to the result list
64                 result.push_back(token);
65             }
66
67             // start the next range
68             if ((start = end) != string::npos) start += skip;
69         }
70
71         return result;
72     }
73 }

第二种方法：

1 #include
2 #include <string>
3 #include
4 using namespace std;
5
6 vector<string> splitEx(const string& src, string separate_character)
7 {
8     vector<string> strs;
9
10   int separate_characterLen = separate_character.size();//分割字符串的长度,这样就可以支持如“,,”多字符串的分隔符
11     int lastPosition = 0,index = -1;
12     while (-1 != (index = src.find(separate_character,lastPosition)))
13     {
14         strs.push_back(src.substr(lastPosition,index - lastPosition));
15         lastPosition = index + separate_characterLen;
16     }
17     string lastString = src.substr(lastPosition);//截取最后一个分隔符后的内容
18     if (!lastString.empty())
19         strs.push_back(lastString);//如果最后一个分隔符后还有内容就入队
20     return strs;
21 }
22
23 int _tmain(int argc, _TCHAR* argv[])
24 {
25     string s = "123,456,789,0,888";
26     string del = ",";
27     vector<string> strs = splitEx(s, del);
28     for ( unsigned int i = 0; i < strs.size(); i++)
29     {
30         cout << strs[i].c_str() << endl;
31     }
32     return 0;
33 }

第三种方法：

1 #include
2 #include <string>
3 #include
4
5 using namespace std;
6
7 void split(const string& src, const string& separator, vector<string>& dest)
8 {
9     string str = src;
10     string substring;
11     string::size_type start = 0, index;
12
13     do
14     {
15         index = str.find_first_of(separator,start);
16         if (index != string::npos)
17         {
18             substring = str.substr(start,index-start);
19             dest.push_back(substring);
20             start = str.find_first_not_of(separator,index);
21             if (start == string::npos) return;
22         }
23     }while(index != string::npos);
24     //the last token
25     substring = str.substr(start);
26     dest.push_back(substring);
27 }
28
29
30 int main()
31 {
32     string src = "Accsvr:tcp     -h   127.0.0.1 -p /t 20018   ";
33     vector<string> d, s;
34     vector<string>::iterator p, q;
35     split(src,":",d);
36     for(p=d.begin();p!=d.end();++p)
37     {
38         cout << *p << endl;
39         s.clear();
40         split(*p," /t/n",s);
41         for (q=s.begin();q!=s.end();++q)
42             cout << "/t" << *q << endl;
43     }
44     return 0;
45 }

第四种方法：

1 #include
2 #include
3 #include <string.h>
4
5 void split(char *src, const char *separator, char **dest, int *num)
6 {
7     char *pNext;
8     int count = 0;
9     if (src == NULL || strlen(src) == 0) return;
10     if (separator == NULL || strlen(separator) == 0) return;
11     pNext = strtok(src,separator);
12     while(pNext != NULL)
13     {
14         *dest++ = pNext;
15         ++count;
16         pNext = strtok(NULL,separator);
17     }
18     *num = count;
19 }
20
21 int main()
22 {
23     char src[] = "Accsvr:tcp -h    127.0.0.1      -p/n    20018";
24     char *dest[128];
25     char *dest2[128];
26     int num = 0, num2 = 0;
27     int i, j;
28
29     split(src,":",dest,&num);
30
31     for (i=0;i32     {
33         printf("|%s|/n",dest[i]);
34         split(dest[i]," /t/n",dest2,&num2);
35         for (j=0;j36         {
37             printf("|%s|/n",dest2[j]);
38         }
39     }
40     return 0;
41 }

第五种方法：

1 #include
2 #include
3 #include <string.h>
4
5 void split(char *src, const char *separator, char **dest, int *num)
6 {
7     char *pSeparator, *pStart, *pEnd;
8     unsigned int sep_len;
9     int count = 0;
10
11     if (src == NULL || strlen(src) == 0) return;
12
13     pSeparator = (char *)malloc(16);
14     if (pSeparator == NULL) return;
15
16     if (separator == NULL || strlen(separator) == 0) strcpy(pSeparator," ");/* one blank by default */
17     else strcpy(pSeparator,separator);
18
19     sep_len = strlen(pSeparator);
20
21     pStart = src;
22
23     while(1)
24     {
25         pEnd = strstr(pStart, pSeparator);
26         if (pEnd != NULL)
27         {
28             memset(pEnd,'/0',sep_len);
29             *dest++ = pStart;
30             pEnd = pEnd + sep_len;
31             pStart = pEnd;
32             ++count;
33         }
34         else
35         {
36             *dest = pStart;
37             ++count;
38             break;
39         }
40     }
41     *num = count;
42     if (pSeparator != NULL) free(pSeparator);
43 }
44
45 int main()
46 {
47     char src[] = "Accsvr:tcp -h    127.0.0.1    -p    20018";
48     char *dest[128];
49     char *dest2[128];
50     int num = 0, num2 = 0;
51     int i, j;
52
53     split(src,":",dest,&num);
54
55     for (i=0;i56     {
57         printf("|%s|/n",dest[i]);
58         split(dest[i],"/t",dest2,&num2);
59         for (j=0;j60         {
61             printf("|%s|/n",dest2[j]);
62         }
63     }
64     return 0;
65 }