vector에 접근하는 두가지 방법

vector<Vec3f> circles;

  Vec3f vec;

for (int i = 0; i < circles.size(); i++) {

vec = circles[i];

int cx = vec[0];

int cy = vec[1];

int radius = vec[2];

printf("Circles[%d]: (cx , cy)= (%d , %d), r = %d\n", k++, cx, cy, radius);

circle(image, Point(cx, cy), radius, Scalar(0, 0, 255), 2);

}

  vector<Vec3f> circles;

vector<Vec3f>::const_iterator itc = circles.begin();

while (itc != circles.end()) {

int cx = (*itc)[0];

int cy = (*itc)[1];

int radius = (*itc)[2];

printf("Circles[%d]: (cx , cy)= (%d , %d), r = %d\n", k++, cx, cy, radius);

circle(image, Point(cx, cy), radius, Scalar(0, 0, 255), 2);

++itc;

}

같은 결과 값을 가진다.