| Ex No | Pg No | Exercise | Solution | Solved by |
|---|---|---|---|---|
| 1 | 97 |
As written, getint treats a + or - not followed by a digit as a valid representation of zero.
Fix it to push such a character back on the input.
|
Listing krx501 | Gregory Pietsch |
| 2 | 97 |
Write getfloat , the floating-point analog of getint . What type does getfloat return as its
function value?
|
Listing krx502 | Chris Mears, Gregory Pietsch |
| 3 | 107 |
Write a pointer version of the function strcat that we showed in
Chapter 2: strcat(s,t) copies the string t to the end of s .
|
Listing krx503 | Me |
| 4 | 107 |
Write the function strend(s,t) , which returns 1 if the
string t occurs at the end of the string s , and zero otherwise.
|
Listing krx504 | Bryan Williams |
| 5 | 107 |
Write versions of the library functions strncpy , strncat , and strncmp , which
operate on at most the first n characters of their argument strings. For example,
strncpy(s,t,n) copies at most n characters of t to s . Full descriptions are in Appendix B.
|
Listing krx505 | Lars Wirzenius |
| 6 | 107 |
Rewrite appropriate programs from earlier chapters and exercises with pointers instead of array
indexing. Good possibilities include getline (Chapters 1 and 4), atoi , itoa , and their
variants (Chapters 2, 3, and 4), reverse (Chapter 3), and strindex and getop (Chapter 4).
|
Listing krx506 | Gregory Pietsch |
| 7 | 110 |
Rewrite readlines to store lines in an array supplied by main , rather than calling alloc to
maintain storage. How much faster is the program?
|
Listing krx507 | Steven Huang |
| 8 | 112 |
There is no error-checking in day_of_year or month_day. Remedy this defect.
|
Listing krx508 | Lars Wirzenius |
| 9 | 114 |
Rewrite the routines day_of_year and month_day with pointers instead of indexing.
|
Listing krx509 | Lars Wirzenius, Gregory Pietsch |
| 10 | 118 |
Write the program expr , which evaluates a reverse Polish expression
from the command line, where each operator or operand is a separate argument.
For example, expr 2 3 4 + * evaluates 2 X (3+4). |
Listing krx510 | Lars Wirzenius |
| 11 | 118 |
Modify the programs entab and detab (written as exercises in Chapter 1) to
accept a list of tab stops as arguments. Use the default tab settings if there
are no arguments.
|
Listing krx511 | Gregory Pietsch |
| 12 | 118 |
Extend entab and detab to accept the shorthand entab -m +n
to mean tab stops every n columns, starting at column m . Choose
convenient (for the user) default behavior.
|
No solution yet posted. | ---- |
| 13 | 118 |
Write the program tail, which prints the last n lines of its input. By default, n is 10, say,
but it can be changed by an optional argument, so that
prints the last n lines. The program should behave rationally no matter
how unreasonable the input or the value of n. Write the program so it makes the
best use of available storage; lines should be stored as in the sorting program
of Section 5.6, not in a two-dimensional array of fixed size.
|
Listing krx513 | Gregory Pietsch, Steven Huang |
| 14 | 121 |
Modify the sort program to handle a -r flag, which indicates
sorting in reverse (decreasing) order. Be sure that -r works with -n.
|
Listing krx514 | Steven Huang |
| 15 | 121 |
Add the option -f to fold upper and lower case together, so that case distinctions
are not made during sorting; for example, a and A compare equal.
|
No solution yet posted. | ---- |
| 16 | 121 |
Add the -d ("directory order") option, which makes comparisons only on letters, numbers
and blanks. Make sure it works in conjunction with -f .
|
No solution yet posted. | ---- |
| 17 | 121 |
Add a field-handling capability, so sorting may be done on fields within lines, each field
sorted according to an independent set of options. (The index for this book was sorted
with -df for the index category and -n for the page numbers.)
|
No solution yet posted. | ---- |
| 18 | 126 |
Make dcl recover from input errors.
|
No solution yet posted. | ---- |
| 19 | 126 |
Modify undcl so that it does not add redundant parentheses to declarations.
|
No solution yet posted. | ---- |
| 20 | 126 |
Expand dcl to handle declarations with function argument types, qualifiers like const , and so on.
|
No solution yet posted. | ---- |