Introduction - If you have any usage issues, please Google them yourself
Write a program that allows users to enter the number on the four groups, representing the coordinates of four points, and the input sequence order of the four endpoints clockwise direction, the program is based on the input of the four coordinates to determine the shape, may be the shape of the square (square), rectangle (rectangle), diamond (diamond), parallelogram (parallelogram) and others (other), and the output must be the most suitable answer.