编写一个程序可以让用户选择在指定位置打印出不同的图形，如正立等腰三角形，倒立等腰三角形，矩形，正方形、菱形和多边形。图形由随机选择的*或者＃组成。所谓指定位置是指图形离左边屏幕最近字符与左屏幕边界的距离字符数。(注意，由于字符大小和间隔的原因，字符组成的正方形图案可能并不标准)。-Write a program that allows users to choose to print out the specified location of different graphics, such as the legislation is being isosceles triangle, inverted isosceles triangle, rectangle, square, diamond, and polygons. Graphics by the random selection of the* or# form. The so-called specified location refers to the graphic characters from the left side of the screen and the left edge of the screen recently the distance the number of characters. (Note that, due to the size and spacing of the reasons for characters, character pattern composed of squares may not be standard).