因一般原因而抛出异常c

我的构造函数中有以下代码块(这只是一个示例,问题不是关于拆分,而是抛出一个通用异常.另外,不能使用Boost库.

Transfer::Transfer(const string &dest){
  try{
    struct stat st;
    char * token;
    std::string path(PATH_SEParaTOR) // if it is \ or / this macro will solve it
    token = strtok((char*)dest.c_str(),PATH_SEParaTOR) // 
    while(token != NULL){
        path += token;
        if(stat(path.c_str(),&st) != 0){
            if(mkdir(path.c_str()) != 0){
                 std:string msg("Error creating the directory\n");
                 throw exception // here is where this question lies
            }
        }

        token = strtok(NULL,PATH_SEParaTOR);
        path += PATH_SEParaTOR;

    }
  }catch(std::exception &e){
       //catch an exception which kills the program
       // the program shall not continue working.
  }

}

我想要的是如果目录不存在而无法创建,则抛出异常.我想抛出一个通用异常,我怎么能用C做呢？
PS：dest具有以下格式：

dest = /usr/var/temp/current/tree

解决方法

请检查 this answer.这解释了如何使用您自己的异常类

class myException: public std::runtime_error
{
    public:
        myException(std::string const& msg):
            std::runtime_error(msg)
        {}
};

void Transfer(){
  try{
          throw myException("Error creating the directory\n");
  }catch(std::exception &e){
      cout << "Exception " << e.what() << endl;
       //catch an exception which kills the program
       // the program shall not continue working.
  }

}

此外,如果您不想要自己的课程,您可以简单地执行此操作

throw std::runtime_error("Error creating the directory\n");