10.18 Draw the stack of activation records for the following Ada program (a) after the first call to procedure b; (b) after the second call to procedure b. Show the control links and the access links for each activation record. (c) Indicate how b is found in procedure c. procedure env is procedure a is procedure b is procedure cis begin b; end c; begin c; end b; begin b; end a; begin a; end env;

4. Repeat Programming Exercise 3 by declaring numl, num2, and num3, and average of type double. Store 75.35 into numl, -35.56 into num2, and 15.76 into num3.

(For thought) a. What’s an advantage of namespaces? b. What’s a possible disadvantage of namespaces?

(Conversion) a. Write a C++ program to convert meters to feet. The program should request the starting meter value, the number of conversions to be made, and the increment between metric values. The display should have appropriate headings and list the meters and the corresponding feet value. If the number of iterations is greater than 10, have your program substitute a default increment of 10. Use the relationship that 1 meter = 3.281 feet. b. Run the program written in Exercise 6a on a computer. Verify that your program begins at the correct starting meter value and contains the exact number of conversions specified in your input data. c. Modify the program written in Exercise 6a to request the starting meter value, the ending meter value, and the increment. Instead of the condition checking for a fixed count, the condition checks for the ending meter value. If the number of iterations is greater than 20, have your program substitute a default increment of (ending value - starting value) / 19.