opencv - save an image in a complete path -

i using opencv library , visual studio 2013. save result image in complete path. it's ok same path c:\\... doesn't work. tried use both forward \ , /, result looked same. here code:

#include<iostream> #include<opencv2/imgproc/imgproc.hpp> #include<opencv2/highgui/highgui.hpp>  using namespace std; using namespace cv;  int main() {  mat src, dst; float sum;  /// load image src = imread("lena.jpg", cv_load_image_grayscale);  if (!src.data) {     return -1; }  // define kernel float kernel[3][3] = {     { 1 / 9.0, 1 / 9.0, 1 / 9.0 },     { 1 / 9.0, 1 / 9.0, 1 / 9.0 },     { 1 / 9.0, 1 / 9.0, 1 / 9.0 } }; dst = src.clone(); (int y = 0; y < src.rows; y++) (int x = 0; x < src.cols; x++)     dst.at<uchar>(y, x) = 0.0; //convolution operation (int y = 1; y < src.rows - 1; y++){     (int x = 1; x < src.cols - 1; x++){         sum = 0.0;         (int k = -1; k <= 1; k++){             (int j = -1; j <= 1; j++){                 sum = sum + kernel[j + 1][k + 1] * src.at<uchar>(y - j, x - k);             }         }         dst.at<uchar>(y, x) = sum;     } }  namedwindow("final"); imshow("final", dst);  namedwindow("initial"); imshow("initial", src); vector<int> compression_params; //vector stores compression parameters of image  compression_params.push_back(cv_imwrite_jpeg_quality); //specify compression technique  compression_params.push_back(100); //specify compression quality  bool bsuccess = imwrite("filtre.jpg", dst, compression_params);//ok     bool bsucccess = imwrite("d:/trunk/jpwl/release/nouveau_dossier/filtre.jpg", dst, compression_params);// not ok     bool bsuccces = imwrite("d:\trunk\jpwl\release\nouveau_dossier\filtre.jpg", dst, compression_params);// not ok  waitkey();   return 0; } 

use: "d:\trunk\jpwl\release\nouveau_dossier\filtre.jpg" (with double backslash, stackoverflow shows single backslash)

or

@"d:/trunk/jpwl/release/nouveau_dossier/filtre.jpg" instead. single \ esc character.

dick