c++鼠标点点，获取坐标值，放入到txt文件中

// oj3.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include<iostream>
#include<opencv2opencv.hpp>
#include<opencv2/imgproc/types_c.h>

#include <opencv2objdetectobjdetect_c.h>
#include <fstream>

using namespace cv;
using namespace std;
struct my3dim
{
int x;
int y;
int label;
};
vector<my3dim> mypoint1;
vector<my3dim> mypoint2;
vector<CvPoint> points1;
vector<CvPoint> points2;
vector<CvPoint> points3;
Mat expanded, img1, img2;
Point cent;
my3dim mytmp;
void onmouse(int event, int x, int y, int flag, void *img)//鼠标事件回调函数，鼠标点击后执行的内容应在此
{
switch (event)
{
case EVENT_LBUTTONDOWN://鼠标左键按下事件
cent.x = x;
cent.y = y;
mytmp.x = x;
mytmp.y = y;
mytmp.label = 1;
circle(img1, cent, 2, Scalar(255, 255, 0), 3);
cout << "第一个 " << x << " " << y << endl;
points1.push_back(CvPoint(x, y));
mypoint1.push_back(mytmp);
break;
case EVENT_RBUTTONDOWN://鼠标左键按下事件
cent.x = x;
cent.y = y;
mytmp.x = x;
mytmp.y = y;
mytmp.label = -1;
circle(img1, cent, 2, Scalar(255, 0, 0), 3);
cout << "第一个 " << x << " " << y << endl;
points1.push_back(CvPoint(x, y));
mypoint1.push_back(mytmp);
break;
default:
break;
}
}
void onmouse2(int event, int x, int y, int flag, void *img)//鼠标事件回调函数，鼠标点击后执行的内容应在此
{
switch (event)
{
case EVENT_LBUTTONDOWN://鼠标左键按下事件
cout << "第二个 " << x << " " << y << endl;
points2.push_back(CvPoint(x, y));
break;
case EVENT_LBUTTONUP:

break;
default:
break;
}
}
void onmouse3(int event, int x, int y, int flag, void *img)//鼠标事件回调函数，鼠标点击后执行的内容应在此
{
switch (event)
{
case EVENT_LBUTTONDOWN://鼠标左键按下事件
cout << "第二个 " << x << " " << y << endl;
points3.push_back(CvPoint(x, y));

cent.x = x;
cent.y = y;
if (x <= img1.cols)
circle(expanded, cent, 2, Scalar(255, 0, 0), 3);
else
circle(expanded, cent, 2, Scalar(0, 0, 255), 3);
break;
default:
break;
}
//imshow("combined", expanded);
}

int main()
{
img1 = imread("E:\zhouliyang\fordebug\MVS\data\1452252565655\back\key\00009.jpg");//读取图像
//从文件中读入图像

img2 = imread("E:\zhouliyang\fordebug\MVS\data\1452252565655\side2\key\00000.jpg");//读取图像

namedWindow("第一个图像");//窗口
//namedWindow("第二个图像", WINDOW_NORMAL);//窗口
setMouseCallback("第一个图像", onmouse, &img1);//注册鼠标事件到“鼠标画个框”窗口，即使在该窗口下出现鼠标事件就执行onmouse函数的内容,最后一个参数为传入的数据。这里其实没有用到
//setMouseCallback("第二个图像", onmouse2, &img2);
imshow("第一个图像", img1);

while (true)
{

imshow("第一个图像", img1);
int key = waitKey(10);
if (key == 27)
break;
//expanded = srcImg.clone();
}

destroyAllWindows();

fstream outfile("G:\download\points.txt");
if (!outfile)
{
cout << "unable open outfile" << endl;
exit(1);
}
for (int i = 0; i < mypoint1.size(); i++)
{

outfile << mypoint1[i].x << " " << mypoint1[i].y << " "<<mypoint1[i].label<<endl;
}
outfile.close();

return 0;
}