#include "cv.h"
#include "highgui.h"

//using namespace std;

int main(int argc, char** argv) {
	//int i=0;  
	cvNamedWindow("Example2_9", CV_WINDOW_AUTOSIZE);
	CvCapture* capture;
	capture = cvCreateCameraCapture(0);
	assert(capture != NULL);
	IplImage* frame;
	//frame = cvQueryFrame( capture );  //先读一次规避掉第一帧  
	while (1) {
		frame = cvQueryFrame(capture);
		//if (!frame) break;         //如果程序不能读取摄像头，那么将此句删除或加个判断即采用注释掉的i语句又或者在while前读一次  
		//if( !frame&i>0 ) break;  
		//if(i>0)  
		cvShowImage("Example2_9", frame);
		char c = cvWaitKey(10);
		if (c == 27) break;
		//i++;  
	}
	cvReleaseCapture(&capture);
	cvDestroyWindow("Example2_9");
	return 0;
}

环境： vs2013  + opencv 2.4.9