Type into the member function Main a few lines of code to create an instance of Quad and then assert that when the object Area method is given a length of 3 and width of 2, it returns the value 6.

This paper introduces a method of drawing out the feature of body. It extracts the area, the length and the center coordinate position of body at the same time.

For the first time, the area formatted by the outline of cultured ovule and fibers was determined using digital image analysis software. This method is relative easier than length measurement.