53 lines
1.0 KiB
C
53 lines
1.0 KiB
C
#include <stdio.h>
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#define MAXLINE 1000 /* maximum characters in a line */
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#define TABWIDTH 4 /* tab size */
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int my_getline(char line[], int maxline);
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void detab(char to[], char from[]);
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main()
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{
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int len; /* current line length */
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char line[MAXLINE]; /* current input line */
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char detab_line[MAXLINE]; /* detabbed line */
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while ((len = my_getline(line, MAXLINE)) > 0) {
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detab(detab_line, line);
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printf("%s", detab_line);
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}
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return 0;
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}
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/* my_getline: reads in a line, return the length */
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int my_getline(char line[], int lim)
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{
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int c, i;
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for (i = 0; i < lim-1 && (c=getchar()) != EOF && c != '\n'; ++i)
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line[i] = c;
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if (c == '\n') {
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line[i] = c;
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++i;
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}
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line[i] = '\0';
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return i;
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}
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/* detab: replace tab with blanks in line; does not handle the limit */
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void detab(char to[], char from[])
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{
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int i, j, k;
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i = j = k = 0;
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while ((to[j] = from[i]) != '\0') {
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if (to[j] == '\t')
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for (k = 0; k < TABWIDTH; ++k, ++j)
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to[j] = ' ';
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else
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++j;
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++i;
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}
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}
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