1 5dc21454 2023-07-14 jrmu /*
 2 5dc21454 2023-07-14 jrmu  * 1-20. Write a program detab that replaces tabs in the input with the proper number of blanks to space to the next tab stop. Assume a fixed set of tab stops, say every n columns. Should n be a variable or a symbolic parameter?
 3 5dc21454 2023-07-14 jrmu  */
 4 5dc21454 2023-07-14 jrmu 
 5 5dc21454 2023-07-14 jrmu #include <stdio.h>
 6 5dc21454 2023-07-14 jrmu #define TABSTOP 8
 7 5dc21454 2023-07-14 jrmu 
 8 5dc21454 2023-07-14 jrmu main()
 9 5dc21454 2023-07-14 jrmu {
10 5dc21454 2023-07-14 jrmu 	int c;
11 5dc21454 2023-07-14 jrmu 	int col = 1, i;
12 5dc21454 2023-07-14 jrmu 	while ((c = getchar())!=EOF) {
13 5dc21454 2023-07-14 jrmu 		if (c == '\t') {
14 5dc21454 2023-07-14 jrmu 			for (i = 0; i == 0 || (i+col-1)%TABSTOP != 0; ++i) {
15 5dc21454 2023-07-14 jrmu 				printf(" ");
16 5dc21454 2023-07-14 jrmu 			}
17 5dc21454 2023-07-14 jrmu 			col += i;
18 5dc21454 2023-07-14 jrmu 		} else {
19 5dc21454 2023-07-14 jrmu 			printf("%c", c);
20 5dc21454 2023-07-14 jrmu 			++col;
21 5dc21454 2023-07-14 jrmu 			if (c == '\n')
22 5dc21454 2023-07-14 jrmu 				col = 1;
23 5dc21454 2023-07-14 jrmu 		}
24 5dc21454 2023-07-14 jrmu 	}
25 5dc21454 2023-07-14 jrmu }