TXT转换成pcd格式的文件

#include<iostream>
#include<fstream>
#include <string>
#include<limits>
#include<stdio.h>
#include <pcl/io/pcd_io.h>
#include <pcl/point_types.h>
#include <pcl/visualization/cloud_viewer.h>
#include <pcl/io/io.h>
using namespace std;

int user_data;
void viewerOneOff(pcl::visualization::PCLVisualizer& viewer)
{
viewer.setBackgroundColor(0.0, 0.0, 0.0);
}

int
main(int argc, char** argv)
{
//float a;
FILE *fin;
double *x, *y, *z;
int nn = 0;
int i;
pcl::PointCloud<pcl::PointXYZ> cloud;
pcl::PointCloud<pcl::PointXYZ>::Ptr cloud_a(new pcl::PointCloud<pcl::PointXYZ>);

fin = fopen("2.txt","r");
if (!fin)