c++ - C++中字符串 vector 的排序 vector

Question

我很难弄明白，如何对字符串 vector 的 vector 进行排序，这是测试代码。

#include <iostream>
#include <vector>
#include <boost/algorithm/string.hpp>

int main(int argc, char** argv) {
  std::vector <std::vector <std::string> > data_var;
  std::vector <std::string> temp;

  std::string str1 = "1,hello3,temp2";
  std::string str2 = "2,hello2,temp1";
  std::string str3 = "3,hello1,temp3";

  boost::split(temp, str1, boost::is_any_of(","));
  data_var.push_back(temp);
  boost::split(temp, str2, boost::is_any_of(","));
  data_var.push_back(temp);
  boost::split(temp, str3, boost::is_any_of(","));
  data_var.push_back(temp);

  // sorting code here...
}

提前致谢...

Answer 1

好吧:新的更简单的答案，已经知道 vector 是可比较的:

//sorting code here...
std::sort(data_var.begin(), data_var.end(), std::greater<std::vector<std::string>>());