c++字符串分割（ split string）

利用工厂模式的设计方法，为装饰者模式创建对象，写了个简单的字符串分割

#include <string>
#include <iostream>
#include <vector>
using namespace std;


void substring(  string originString,vector<string> &splittedString  ){
    int begin = 0;
    size_t len = originString.length();
    for(int i = 0;i<=len;i++){
        if(originString[i] == ',')        {
            splittedString.push_back(originString.substr(begin,i - begin));
                    begin = i+1   ;     
               }          
    }
      splittedString.push_back(originString.substr(begin, len - begin));     
}    

int main(){
    vector<string> splittedString;// = {string("hello"),string("hello"),string("hello")};
    string originString = "apple,banana,orange";
    substring(originString, splittedString);
    for( int i = 0;i<=2;i++)
        cout<<splittedString[i]<<'\n';        
    getchar();
    return 0;
};    

　　

　　想了想，觉得c语言用字符指针实现起来不会这么臃肿