2.10 Exercises

See Appendix A, Exercise Answers for answers.

1. Write a program that computes the circumference of a circle with a radius of 12.5. The circumference is 2 times the radius, or about 2 times 3.141592654 times the radius.

2. Modify the program from the previous exercise to prompt for and accept a radius from the person running the program.

3. Write a program that prompts for and reads two numbers, and prints out the result of the two numbers multiplied together.

4. Write a program that reads a string and a number, and prints the string the number of times indicated by the number on separate lines. (Hint: use the "x" operator.)