Implementation Idea

Let f(x) be a real-valued function that is defined in the interval of [x₀, x₁) and which holds y₀ f(x) y₁ x [x₀, x₁).

The selected rectangular area specified by x0, x1, y0, and y1 can be mapped linearly to a two-dimensional array (called canvas) of characters. The larger the array, the smaller the granularity.

To graph the function, we can evaluate it at those values of x that correspond to the individual columns of the canvas and store some character (other than space) at the row of the column that corresponds to y = f(x).

Finally, we can output the canvas by printing the first row on the first line, the second row on the second line etc.

	Let f(x) be a real-valued function that is defined in the interval of [x₀, x₁) and which holds y₀ f(x) y₁ x [x₀, x₁).
	The selected rectangular area specified by x0, x1, y0, and y1 can be mapped linearly to a two-dimensional array (called canvas) of characters. The larger the array, the smaller the granularity.
	To graph the function, we can evaluate it at those values of x that correspond to the individual columns of the canvas and store some character (other than space) at the row of the column that corresponds to y = f(x).
	Finally, we can output the canvas by printing the first row on the first line, the second row on the second line etc.