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#include struct point {float x,y; }; double area(point p1,point p2) {double a; a=sqrt((p2.x-p1.x)*(p2.x-p1.x)*(p2.y-p1.y)*(p2.y-p1.y)); return a; } void main () {double s;point p1,p2; coutp1.x>>p1.y>>p2.x>>p2.y; s=area(p1,p2); ...

Note When using the FaceRecognizer interface in combination with Python, please stick to Python 2. Some underlying scripts like create_csv will not work in other versions, like Python 3. cv2如果用上了人脸识别,最好用python2,...

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