C++ programming: For this problem, we wish to draw a number of shapes, using "character graphics". For each part of the problem, your program should input all parameters from the keyboard (after prompting the user). Moreover, the program should ensure that inputs are legal for the shape in question. Do not worry about the case where the parameters are too big to be displayed properly in the xterm. Given a radius, draw a circle with that radius. Hint: Recall that a circle of radius r is defined as the set of points (x,y) where x2+y2