(Program) The quadrant in which a line starting from the origin is located is determined...

(Program) The quadrant in which a line starting from the origin is located is determined by the angle the line makes with the positive x axis, as follows:

a. Using this information, write, compile, and run a C++ program that accepts the angle of the line as user input and determines and displays the correct quadrant for the input data. (Note: If the angle is exactly 0, 90, 180, or 270 degrees, the corresponding line doesn’t reside in any quadrant but lies on an axis.)

b. Modify the program written for Exercise 8a to display a message that identifies an angle of 0 degrees as the positive x axis, an angle of 90 degrees as the positive y axis, an angle of 180 degrees as the negative x axis, and an angle of 270 degrees as the negative y axis.