```
find() : Finds the first substring equal to the given character sequence
find_first_of() : Finds the first character equal to one of characters in the given character sequence
//字符串分割函数 str为待分割的字符串 pattern为任意分割符(**每一个字符都为分割符**)，例如：";,"是以 ';' 和 ',' 分割，并且去掉了分割后的空字符串。 sbcssdfs 以s分割得 "bc" "df"
vector<string> split(string str, string pattern)
{vector<string> ret;if (pattern.empty()) return ret;size_t start = 0;size_t index = str.find_first_of(pattern, 0);while (index != string::npos){if (start != index)ret.push_back(str.substr(start, index - start));start = index + 1;index = str.find_first_of(pattern, start);}if (!str.substr(start).empty())ret.push_back(str.substr(start));return ret;
}
//分割后保留空字符串。sbcssdfs 以s分割得 "" "bc" "" "df" ""
vector<string> split(string str, string pattern)
{vector<string> ret;if (pattern.empty()) return ret;size_t start = 0;size_t index = str.find_first_of(pattern, 0);while (index != string::npos){ret.push_back(str.substr(start, index - start));start = index + 1;index = str.find_first_of(pattern, start);}ret.push_back(str.substr(start));return ret;
}
```
用Poco中的StringTokenizer
```
#include "Poco/StringTokenizer.h"
#include "Poco/String.h" // for cat
// 分割字符串，s:将被分割的字符串，k：分割符
// 例如： k是 ";,"表示用 ';' 和 ',' 分割
std::vector<std::string> SplitString(std::string s, std::string k)
{/*Poco::StringTokenizer t1("red, green, blue", ",");// "red", " green", " blue"     (note the whitespace)Poco::StringTokenizer t2("red,green,,blue", ",");// "red", "green", "", "blue"Poco::StringTokenizer t3("red ; green , blue", ",;",Poco::StringTokenizer::TOK_TRIM);// "red", "green", "blue"Poco::StringTokenizer t4("red; green,, blue", ",;",Poco::StringTokenizer::TOK_TRIM | Poco::StringTokenizer::TOK_IGNORE_EMPTY);// "red", "green", "blue"std::string ss(Poco::cat(std::string("; "), t4.begin(), t4.end()));// "red; green; blue*/Poco::StringTokenizer st(s, k);//这样是不去掉 "" ,当加上 TOK_IGNORE_EMPTY（宏定义为1）即去掉 "" 了。std::vector<std::string> vecRet(st.begin(), st.end());return vecRet;
}
```
另外一个字符串整体为分割符：（单个字符就跟上面的一样了）
```
//pattern作为一个整体当分割符,(不去掉 "")
vector<string> split(string str, string pattern)
{vector<string> ret;if (pattern.empty()) return ret;size_t start = 0;size_t index = str.find(pattern, 0);while (index != string::npos){ret.push_back(str.substr(start, index - start));start = index + pattern.size();index = str.find(pattern, start);}ret.push_back(str.substr(start));return ret;
}
```

void eatspaces(char* s)
{int i = 0;int j = 0;while ((s[i] = s[j]) != '\0'){++j;if (s[i] != ' ')++i;}
}