1 /* 1-18. Write a program to remove trailing blanks and tabs from each
2  * line of input, and to delete entirely blank lines.
3  */
4 
5 /* MAXLINE has been reduced for easier testing */
6 #include <stdio.h>
7 #define MAXLINE 1000
8 
9 int getlin(char line[], int maxline);
10 void copy(char to[], char from[]);
11 
12 main()
13 {
14 	int len;	/* current line length */
15 	char line[MAXLINE];	/* current input line */
16 	
17 	while ((len = getlin(line, MAXLINE)) > 0) {
18 		if (line[0] != '\0')
19 			printf("%s\n", line);
20 	}
21 	return 0;
22 }
23 
24 int getlin(char s[], int lim)
25 {
26 	int c, i, nullchar;
27 	nullchar = 0;
28 
29 	for (i=0; i<lim-1 && (c=getchar())!=EOF && c!='\n'; ++i) {
30 		if (c != '\t' && c != ' ') {
31 			nullchar = i+1;
32 		}
33 		s[i] = c;
34 	}
35 	if (c == '\n')
36 		++i;
37 	s[nullchar] = '\0';
38 	return i;
39 }
40 
41 void copy(char to[], char from[])
42 {
43 	int i;
44 	i = 0;
45 	while ((to[i] = from[i]) != '\0')
46 		++i;
47 }