error C3861: 'cv2DRotationMatrix': identifier not found / error C3861: 'cvWarpAffine': identifier not found

edit

Someone please help me solve this problem thanks

#include "opencv2/highgui/highgui.hpp"
#include <iostream>

using namespace cv;
using namespace std;


IplImage *rotateImage(const IplImage *src, int angleDegrees, double zoom)
{    
    IplImage *imageRotated = cvCloneImage(src);


    CvMat* rot_mat = cvCreateMat(2,3,CV_32FC1);

    // Compute rotation matrix
    CvPoint2D32f center = cvPoint2D32f( cvGetSize(imageRotated).width/2, cvGetSize(imageRotated).height/2 );
    cv2DRotationMatrix( center, angleDegrees, zoom, rot_mat );

    // Do the transformation
    cvWarpAffine( src, imageRotated, rot_mat );

    return imageRotated;
}


int main()
{

          IplImage* img;
          IplImage* rotated_img;

          int angle=0;
          int zoom=24;

          //creating the window with 2 track bars
          cvNamedWindow("MyWindow");
          cvCreateTrackbar("Angle", "MyWindow", &angle, 360, 0);
          cvCreateTrackbar("Zoom", "MyWindow", &zoom, 99, 0);

          while(true){
              //load the original image
              img = cvLoadImage("C:/MyPic.jpg");

              //rotate the image
              rotated_img=rotateImage( img, angle, (zoom+1)/25.0 );

              //display the rotated image
              cvShowImage("MyWindow", rotated_img); 

              //clean up
              cvReleaseImage(&img);
              cvReleaseImage(&rotated_img);

              //if user press 'ESC' button, program quit the while loop
              int c=cvWaitKey(50);               
              if(c==27) break;
          }


          cvDestroyWindow("MyWindow");

          return 0;
}