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authorzlg <zlg@zlg.space>2013-02-13 20:48:44 -0600
committerzlg <zlg@zlg.space>2013-02-13 20:48:44 -0600
commit5018e06c580dd21c958ec1672c26a3448faf0c55 (patch)
treecebbb56dad0a6b821cad3712c7977f6f9b0086ab /1-20_detab.c
parentFix 1-09's solution (diff)
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Add license file, reorganize project
Diffstat (limited to '1-20_detab.c')
-rw-r--r--1-20_detab.c48
1 files changed, 0 insertions, 48 deletions
diff --git a/1-20_detab.c b/1-20_detab.c
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-#include <stdio.h>
-
-/* The C Programming Language: 2nd Edition
- * Exercise 1-20:
- * "Write a program `detab` that replaces tabs in the input with the proper
- * number of blanks to space to the next tabstop. Assume a fixed set of
- * tabstops, say every 'n' columns. Should 'n' be a variable or a symbolic
- * parameter?"
- *
- * Answer: 'n' should be a symbolic parameter. It's more apparent what's being
- * worked with and it's not susceptible to scope. Though, in this simple
- * program it really doesn't matter.
- *
- * The "correct" solution uses the isprint() stdlib function, but it's not
- * covered by this point in the book, so I did not use it.
- */
-
-#define TABWIDTH 8
-
-int main(void) {
- int column, c;
- column = 0;
- while ((c = getchar()) != EOF) {
- // Be sure that the character is a tab
- if (c == '\t') {
- /*
- * Divide a line by TABWIDTH and you have your tabstops. If you
- * modulo by TABWIDTH and it equals 0, you've reached a tabstop and
- * don't need to output more spaces!
- */
- while (column % TABWIDTH != 0 && column != 0) {
- putchar(' ');
- ++column;
- }
- } else {
- if (c == '\n') {
- // Line-endings should reset the column counter after being output.
- putchar(c);
- column = 0;
- } else {
- // Now we can just output and increase column!
- putchar(c);
- ++column;
- }
- }
- }
- return 0;
-}