At the beginning of class on the due date, submit your neatly presented solution with this page stapled to the front (10 points).
Given the following program (in pseudo-like language), construct two control flow graphs for the program. In the first, use maximal basic blocks; in the second, place each statement in its own basic block. In both cases, label the nodes in the graphs with the numbers of the program statements.
procedure sqrt(real x):real real x1,x2,x3,eps,errval;
begin
1. x3 = 1
2. errval = 0.0
3. eps = .001
4. if (x <= 0.0)
5. output("illegal operand");
6. return errval;
7. else
8. if (x < 1)
9. x1 = x;
10. x2 = 1;
11. else
12. x1 = eps;
13. x2 = x;
14. endif
15. while ( (x2-x1) >= 2.0*eps ) 16. x3 = (x1+x2)/2.0
17. if ( (x3*x3-x)*(x1*x1-x) < 0)
18. x2 = x3;
19. else
20. x1 = x3;
21. endif;
22. endwhile;
23. return x3;
24. endif;
25. end.
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