用c++写一个基于tsp文件最短路径生成图片的代码，使用同目录下叫arr的tsp文件，生成后的图像文件也在同目录下

以下是基于tsp文件最短路径生成图片的c++代码：

#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <cmath>
#include <algorithm>
#include <opencv2/opencv.hpp>

using namespace std;
using namespace cv;

const double PI = 3.14159265358979323846;

struct Point {
    int x;
    int y;
};

vector<Point> points;

void readTSPFile(string filepath) {
    ifstream file(filepath);
    string line;
    int num_points = 0;
    bool is_data = false;
    while (getline(file, line)) {
        if (line == "NODE_COORD_SECTION") {
            is_data = true;
            continue;
        }
        if (is_data) {
            if (line == "EOF") {
                break;
            }
            Point point;
            sscanf(line.c_str(), "%d %d %d", &num_points, &point.x, &point.y);
            points.push_back(point);
        }
    }
}

double distance(Point p1, Point p2) {
    return sqrt(pow(p1.x - p2.x, 2) + pow(p1.y - p2.y, 2));
}

void drawPath(Mat& img, vector<int>& path) {
    for (int i = 0; i < path.size() - 1; i++) {
        Point p1 = points[path[i]];
        Point p2 = points[path[i+1]];
        line(img, Point(p1.x, p1.y), Point(p2.x, p2.y), Scalar(0, 0, 255), 2);
    }
    Point p1 = points[path[0]];
    Point p2 = points[path[path.size()-1]];
    line(img, Point(p1.x, p1.y), Point(p2.x, p2.y), Scalar(0, 0, 255), 2);
}

void generateImage(vector<int>& path) {
    int width = 800;
    int height = 600;
    Mat img(height, width, CV_8UC3, Scalar(255, 255, 255));
    drawPath(img, path);
    imwrite("path.png", img);
}

int main() {
    string filepath = "arr.tsp";
    readTSPFile(filepath);

    vector<int> path(points.size());
    for (int i = 0; i < points.size(); i++) {
        path[i] = i;
    }

    double min_distance = distance(points[path[0]], points[path[1]]);
    do {
        double distance_sum = 0;
        for (int i = 0; i < path.size() - 1; i++) {
            distance_sum += distance(points[path[i]], points[path[i+1]]);
        }
        if (distance_sum < min_distance) {
            min_distance = distance_sum;
            generateImage(path);
        }
    } while (next_permutation(path.begin(), path.end()));

    return 0;
}

在同目录下放置名为"arr.tsp"的tsp文件，运行程序后会生成名为"path.png"的图片文件，显示出最短路径。