cv::namedWindow changes fscanf parameters, how to prevent this ?

edit

First i have to say that i am french and unlike english, french write 2,5 instead of 2.5. Yet in programmation, I more likely to use english rules. I have a program who need to

• read file with english rules : two int and two double
• use opencv

As you can see in the main.cpp, i do this :

• First I read my file : no problem
• Second I open the VideoCapture and creat windows : no problem
• Third I read again my file : huge problem i do not have the good result, I need to have a file write with the french rules!! (8 1175 0,176259 3,981072)

I can not change my file every time and i need to stay in french or in english (i have a preference for english). What may I do to change this?

readingFile.dat

8   1175 0.176259   3.981072

main.cpp #include <iostream> #include <cstdio> #include <opencv2 highgui="" highgui.hpp=""> #include <opencv2 imgproc="" imgproc.hpp="">

int initCam(cv::VideoCapture * cap) {

/***initialization of cap ***/
cap = new cv::VideoCapture(CV_CAP_OPENNI);
cap->open(CV_CAP_OPENNI);
if( !cap->isOpened() )
{
    std::cout << "***Could not initialize capturing...***"<<std::endl;
    return EXIT_FAILURE;
}

/*** initialization of windows ***/
cv::namedWindow("depth map", 0);
    cv::namedWindow("image", 0);
return EXIT_SUCCESS;
}

int readFile( const char * name) {
int tabInt[2];
double tabDouble[2];

/*** open a file with english notation ***/
FILE *f = fopen(name, "r");
if (!f) return EXIT_FAILURE;

/*** read elements (int and double) ***/
fscanf(f, "%d", tabInt );
fscanf(f, "%d", tabInt+1);
fscanf(f, "%lf", tabDouble);
fscanf(f, "%lf", tabDouble+1);

/*** print elements ***/
std::cout<<"integer table  : " << tabInt[0] <<"\t"<< tabInt[1]<<std::endl;
std::cout<<"double table   : " << tabDouble[0] <<"\t"<< tabDouble[1]<<std::endl;

}


int main(void) {

cv::VideoCapture * cap;
std::string file = "readingFile.dat";
std::cout<<"reading before creating OpenCv windows : "<<std::endl;
readFile(file.c_str());
initCam(cap);   
std::cout<<"reading after creating OpenCv windows : "<<std::endl;
readFile(file.c_str());


}

result :

reading before creating OpenCv windows :
integer table  : 8  1175
double table   : 0.176259   3.98107
init done 
opengl support available 
reading after creating OpenCv windows : 
integer table  : 8  1175
double table   : 0  1.09022e-312