1 5dc21454 2023-07-14 jrmu /* 1-16. Revise the main routine of the longest-line program so it will
 2 5dc21454 2023-07-14 jrmu  * correctly print the length of arbitrarily long input lines, and as much
 3 5dc21454 2023-07-14 jrmu  * as possible of the text.
 4 5dc21454 2023-07-14 jrmu  */
 5 5dc21454 2023-07-14 jrmu 
 6 5dc21454 2023-07-14 jrmu /* MAXLINE has been reduced for easier testing */
 7 5dc21454 2023-07-14 jrmu #include <stdio.h>
 8 5dc21454 2023-07-14 jrmu #define MAXLINE 10
 9 5dc21454 2023-07-14 jrmu 
10 5dc21454 2023-07-14 jrmu int getlin(char line[], int maxline);
11 5dc21454 2023-07-14 jrmu void copy(char to[], char from[]);
12 5dc21454 2023-07-14 jrmu 
13 5dc21454 2023-07-14 jrmu main()
14 5dc21454 2023-07-14 jrmu {
15 5dc21454 2023-07-14 jrmu 	int len;	/* current line length */
16 5dc21454 2023-07-14 jrmu 	int max;	/* maximum length seen so far */
17 5dc21454 2023-07-14 jrmu 	char line[MAXLINE];	/* current input line */
18 5dc21454 2023-07-14 jrmu 	char longest[MAXLINE];	/* longest line saved here */
19 5dc21454 2023-07-14 jrmu 	
20 5dc21454 2023-07-14 jrmu 	max = 0;
21 5dc21454 2023-07-14 jrmu 	while ((len = getlin(line, MAXLINE)) > 0)
22 5dc21454 2023-07-14 jrmu 		if (len > max) {
23 5dc21454 2023-07-14 jrmu 			max = len;
24 5dc21454 2023-07-14 jrmu 			copy(longest, line);
25 5dc21454 2023-07-14 jrmu 		}
26 5dc21454 2023-07-14 jrmu 	if (max > 0)	/* there was a line */
27 5dc21454 2023-07-14 jrmu 		printf("%d chars: %s", max, longest);
28 5dc21454 2023-07-14 jrmu 	return 0;
29 5dc21454 2023-07-14 jrmu }
30 5dc21454 2023-07-14 jrmu 
31 5dc21454 2023-07-14 jrmu int getlin(char s[], int lim)
32 5dc21454 2023-07-14 jrmu {
33 5dc21454 2023-07-14 jrmu 	int c, i;
34 5dc21454 2023-07-14 jrmu 
35 5dc21454 2023-07-14 jrmu 	for (i=0; i<lim-1 && (c=getchar())!=EOF && c!='\n'; ++i)
36 5dc21454 2023-07-14 jrmu 		s[i] = c;
37 5dc21454 2023-07-14 jrmu 	if (c == '\n') {
38 5dc21454 2023-07-14 jrmu 		s[i] = c;
39 5dc21454 2023-07-14 jrmu 		++i;
40 5dc21454 2023-07-14 jrmu 	}
41 5dc21454 2023-07-14 jrmu 	s[i] = '\0';
42 5dc21454 2023-07-14 jrmu 	while ((c=getchar())!=EOF && c!='\n')
43 5dc21454 2023-07-14 jrmu 		++i;
44 5dc21454 2023-07-14 jrmu 	return i;
45 5dc21454 2023-07-14 jrmu }
46 5dc21454 2023-07-14 jrmu 
47 5dc21454 2023-07-14 jrmu void copy(char to[], char from[])
48 5dc21454 2023-07-14 jrmu {
49 5dc21454 2023-07-14 jrmu 	int i;
50 5dc21454 2023-07-14 jrmu 	i = 0;
51 5dc21454 2023-07-14 jrmu 	while ((to[i] = from[i]) != '\0')
52 5dc21454 2023-07-14 jrmu 		++i;
53 5dc21454 2023-07-14 jrmu }