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#include "stdafx.h"
#include <opencv2/opencv.hpp>
 
static CvMemStorage *storage = 0;
static CvHaarClassifierCascade *cascade = 0;
bool detect_and_draw( IplImage* image ,CvHaarClassifierCascade* cascade);
 
 
int main( int argc, char* argv )
{
    CvCapture* capture = 0;
    IplImage *frame, *frame_copy = 0;
 
    const char* input_name;
    storage = cvCreateMemStorage(0);//建立一個指定大小的記憶體區塊，若為0，則建立的記憶體區塊大小依照預設值為64k 
    capture = cvCaptureFromCAM( 0);// 初始webcam
    cvNamedWindow( "result", 1 );//建立窗口
 
    // If loaded succesfully, then:
    if( capture )
    {
        for(;;)
        {
            // Capture the frame and load it in IplImage
            if( !cvGrabFrame( capture ))
                break;
            frame = cvRetrieveFrame( capture );
            // If the frame does not exist, quit the loop
            if( !frame )
                break;
            // Allocate framecopy as the same size of the frame
            if( !frame_copy )
                frame_copy = cvCreateImage( cvSize(frame->width,frame->height),IPL_DEPTH_8U, frame->nChannels );
 
            // Check the origin of image. If top left, copy the image frame to frame_copy. 
            if( frame->origin == IPL_ORIGIN_TL )
                cvCopy( frame, frame_copy, 0 );
            // Else flip and copy the image
            else
                cvFlip( frame, frame_copy, 0 );
 
 
	    cascade = (CvHaarClassifierCascade*)cvLoad( "haar/haarcascade_mcs_mouth.xml",0,0,0 );
 
	    // Check whether the cascade has loaded successfully. Else report and error and quit
	    if( !cascade )
    		{
       		 fprintf( stderr, "ERROR: Could not load classifier cascade\n" );
       		 return -1;
    		}
            // Call the function to detect and draw the face
         detect_and_draw(frame_copy,cascade);
 
 
            // Wait for a while before proceeding to the next frame
            if( cvWaitKey( 1 ) >= 0 )
             break;
 
 
 
       }
 
        // Release the images, and capture memory
	cvReleaseHaarClassifierCascade(&cascade);
 
    cvReleaseImage( &frame_copy );
    cvReleaseCapture( &capture );
	cvReleaseMemStorage(&storage);
 
 
    }
 
 return 0;
 
}
 
bool detect_and_draw( IplImage* img,CvHaarClassifierCascade* cascade )
{
    int scale = 1;
 
    // Create a new image based on the input image
    IplImage* temp = cvCreateImage( cvSize(img->width/scale,img->height/scale), 8, 3 );
 
    // Create two points to represent the face locations
    CvPoint pt1, pt2;
    int i;
 
    // Clear the memory storage which was used before
    cvClearMemStorage( storage );
 
    // Find whether the cascade is loaded, to find the faces. If yes, then:
    if( cascade )
    {
 
 
        CvSeq* faces = cvHaarDetectObjects( img, cascade, storage,
                                            1.1, 30, CV_HAAR_DO_CANNY_PRUNING,
                                            cvSize(40, 40) );
        for( i = 0; i < (faces ? faces->total : 0); i++ )
        {
 
            CvRect* r = (CvRect*)cvGetSeqElem( faces, i );
 
            pt1.x = r->x*scale;
            pt2.x = (r->x+r->width)*scale;
            pt1.y = r->y*scale;
            pt2.y = (r->y+r->height)*scale;
 
            // Draw the rectangle in the input image
            cvRectangle( img, pt1, pt2, CV_RGB(255,0,0), 3, 8, 0 );
        }
    }
 
 
    cvShowImage( "result", img );
   if(i  > 0)
		return 1;
	else
		return 0;
 
    cvReleaseImage( &temp );
 
 
}
 

prog.cpp:1:20: error: stdafx.h: No such file or directory
prog.cpp:2:30: error: opencv2/opencv.hpp: No such file or directory
prog.cpp:4: error: expected initializer before ‘*’ token
prog.cpp:5: error: expected initializer before ‘*’ token
prog.cpp:6: error: ‘IplImage’ was not declared in this scope
prog.cpp:6: error: ‘image’ was not declared in this scope
prog.cpp:6: error: ‘CvHaarClassifierCascade’ was not declared in this scope
prog.cpp:6: error: ‘cascade’ was not declared in this scope
prog.cpp:6: error: initializer expression list treated as compound expression
prog.cpp:9: error: second argument of ‘int main(int, char*)’ should be ‘char **’
prog.cpp: In function ‘int main(int, char*)’:
prog.cpp:11: error: ‘CvCapture’ was not declared in this scope
prog.cpp:11: error: ‘capture’ was not declared in this scope
prog.cpp:12: error: ‘IplImage’ was not declared in this scope
prog.cpp:12: error: ‘frame’ was not declared in this scope
prog.cpp:12: error: ‘frame_copy’ was not declared in this scope
prog.cpp:15: error: ‘storage’ was not declared in this scope
prog.cpp:15: error: ‘cvCreateMemStorage’ was not declared in this scope
prog.cpp:16: error: ‘cvCaptureFromCAM’ was not declared in this scope
prog.cpp:17: error: ‘cvNamedWindow’ was not declared in this scope
prog.cpp:25: error: ‘cvGrabFrame’ was not declared in this scope
prog.cpp:27: error: ‘cvRetrieveFrame’ was not declared in this scope
prog.cpp:33: error: ‘cvSize’ was not declared in this scope
prog.cpp:33: error: ‘IPL_DEPTH_8U’ was not declared in this scope
prog.cpp:33: error: ‘cvCreateImage’ was not declared in this scope
prog.cpp:36: error: ‘IPL_ORIGIN_TL’ was not declared in this scope
prog.cpp:37: error: ‘cvCopy’ was not declared in this scope
prog.cpp:40: error: ‘cvFlip’ was not declared in this scope
prog.cpp:43: error: ‘cascade’ was not declared in this scope
prog.cpp:43: error: ‘CvHaarClassifierCascade’ was not declared in this scope
prog.cpp:43: error: expected primary-expression before ‘)’ token
prog.cpp:43: error: expected `;' before ‘cvLoad’
prog.cpp:48: error: ‘stderr’ was not declared in this scope
prog.cpp:48: error: ‘fprintf’ was not declared in this scope
prog.cpp:52: error: ‘detect_and_draw’ cannot be used as a function
prog.cpp:56: error: ‘cvWaitKey’ was not declared in this scope
prog.cpp:64: error: ‘cascade’ was not declared in this scope
prog.cpp:64: error: ‘cvReleaseHaarClassifierCascade’ was not declared in this scope
prog.cpp:66: error: ‘cvReleaseImage’ was not declared in this scope
prog.cpp:67: error: ‘cvReleaseCapture’ was not declared in this scope
prog.cpp:68: error: ‘cvReleaseMemStorage’ was not declared in this scope
prog.cpp:14: warning: unused variable ‘input_name’
prog.cpp: At global scope:
prog.cpp:77: error: redefinition of ‘bool detect_and_draw’
prog.cpp:6: error: ‘bool detect_and_draw’ previously defined here
prog.cpp:77: error: ‘IplImage’ was not declared in this scope
prog.cpp:77: error: ‘img’ was not declared in this scope
prog.cpp:77: error: ‘CvHaarClassifierCascade’ was not declared in this scope
prog.cpp:77: error: ‘cascade’ was not declared in this scope

Standard output is empty