regex使用
#include <iostream>
#include <regex>
#include <fstream>
#include <vector>
#include <string>
#include <Eigen/Dense>
#include <Eigen/Core>
using namespace std;
int main() {
ifstream in("/home/xcy/CLionProjects/regex/data.txt");
vector<double> content;
double data;
string str1;
regex r("[1-9]\\d*\\.\\d*|0\\.\\d*[1-9]\\d*$");
vector<Eigen::Vector3d> observation;
int count = 0;
while(getline(in, str1))
{
for(sregex_iterator it(str1.begin(), str1.end(), r), end_it; it != end_it; ++it)
{
data = stof( it->str() );
content.push_back(data);
}
}
for(vector<double>::size_type ix = 0; ix != content.size(); ix += 3)
{
Eigen::Vector3d observation1(content[ix], content[ix + 1], content[ix + 2]);
observation.push_back(observation1);
}
for(vector<Eigen::Vector3d>::iterator it = observation.begin(); it != observation.end(); ++it)
{
cout << *it << endl;
}
cout << observation.size() << endl;
std::cout << "Hello, World!" << std::endl;
return 0;
}