‘CvLoadImage’ was not declared in this scope - c++

Question

I try to use OpenCV C Api in my code. I have opencv and opencv2 folder under usr/include. I can use OpenCV C++ Api. C++ code and compilation&linking commands are below :
#include <iostream>
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/core/core.hpp"
#include "opencv2/opencv.hpp"
using namespace cv;
int main()
{
Mat im = imread("Sobel.jpg");
return 0;
}
Compile : g++ -c main.cpp
Linking : g++ -o exe main.opkg-config --libs opencv`
Now I want to use OpenCV C-Api. My code is here :
#include <iostream>
#include "opencv/cv.h"
#include "opencv/highgui.h"
#include "opencv2/imgproc/imgproc_c.h"
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/core/core.hpp"
#include "opencv2/opencv.hpp"
using namespace cv;
int main()
{
IplImage* pImg = CvLoadImage("Sobel.jpg");
if(pImg == NULL)
return -1;
// ... big bloat to do the same operations with IplImage
CvShowImage("Image", pImg);
cvWaitKey();
CvReleaseImage(&pImg); // Do not forget to release memory.
// end code here
return 0;
}
When I compile g++ -c main.cpp, the compiler says that ‘CvLoadImage’ was not declared in this scope

Answer 1

A simple spelling mistake, the function prototype is
IplImage* cvLoadImage( const char* filename, int iscolor=CV_LOAD_IMAGE_COLOR );