How to equalize an image in c++ ?

#include <opencv2/opencv.hpp>;
#include <iostream>;
#include<math.h>;

using namespace cv;
using namespace std;

Mat eqHist(Mat& src) {
    int histSize = 256;
    float range[] = { 0, 256 };
    const float* histRange = { range };
    bool uniform = true;
    bool accumulate = false;
    

    Mat result;
    Mat hist;
    equalizeHist(src, result);
    //calcHist(&result, 1, 0, Mat(), hist, 1, &histSize, &histRange, uniform, accumulate);
    //normalize(hist, hist, 0, 255, NORM_MINMAX, -1, Mat());
    return result;
}

void main()
{
    Mat image;
    image = imread("D:/1.jpg", 0);  
    imshow("原图", image);
    Mat result = eqHist(image);
    imshow("直方图均