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#include <stdio.h>
#define MAXLINE 1024
/*
* read a line into s, return length,
* assume length is less than MAXLINE
* and the line number is less than MAXLINE
*/
int
get_line(char s[], int lim)
{
int c, i;
for (i = 0; i < lim - 1 && (c = getchar()) != EOF && c != '\n'; ++i) {
s[i] = c;
}
if (c == '\n') {
/* increment i after assignment */
s[i++] = c;
}
/* put null character at end of string */
s[i] = '\0';
return i;
}
/* copy from into to */
void
copy(char to[], char from[])
{
int i = 0;
/* '\0' marks end of string */
while ((to[i] = from[i]) != '\0') {
++i;
}
}
/* remove trailing whitespace */
void
trim(char s[], int i)
{
/* skip null character and new line */
i -= 2;
while (i >= 0 && (s[i] == ' ' || s[i] == '\t')) {
--i;
}
s[i] = '\0';
}
/* flip characters in string */
void
reverse(char s[])
{
int i = 0;
while (s[i] != '\n') {
++i;
}
--i;
char c;
for (int j = 0; j < i / 2; ++j) {
c = s[i - j];
s[i - j] = s[j];
s[j] = c;
}
}
/* print longest input line */
int
main()
{
char line[MAXLINE], longest[MAXLINE];
int len;
int max = 0;
while ((len = get_line(line, MAXLINE)) > 0) {
if (len > max) {
max = len;
copy(longest, line);
}
}
if (max > 0) {
/* trim(longest, max); */
/* reverse(longest); */
printf("%s", longest);
}
return 0;
}
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