
Problem Solving and Computing 11
1. Read the value of the radius r of a circle, from the input device.
2. Establish the constant π with value 3.14159.
3. Compute the area of the circle.
4. Compute the circumference of the circle.
5. Print or display the value of area of the circle to the output device.
6. Print or display the value of cir of the circle to the output device.
The previous algorithm now can be implemented by a program that calculates
the circumference and the area of a circle.
1.8 General Process of Software Development
For large software systems, a general software development process involves car-
rying out a sequence of well-defined phases ...