learn_c/intro/ex1_16.c

59 lines
1.1 KiB
C

#include <stdio.h>
#define MAXLINE 1000 /* maximum input line size */
int get_line(char line[], int maxline);
void copy(char to[], char from[]);
/* print longest input line */
main()
{
int len;
int max;
char line[MAXLINE];
char longest[MAXLINE];
max = 0;
while ((len = get_line(line, MAXLINE)) > 0)
if (len > max) {
max = len;
copy(longest, line);
}
if (max > 0) /* there was a line */
if (max > MAXLINE) {
printf("\n\nStorage limit exceeded by : %d", max-MAXLINE);
printf("\nString length : %d", max);
printf("\n%s", longest);
}
else
printf("%s", longest);
return 0;
}
/* getline: read a line into s, return lenght */
int get_line(char s[], int lim)
{
int c, i;
for (i = 0; (c = getchar()) != EOF && c != '\n'; ++i)
if (i < lim-1)
s[i] = c;
if (i < lim-1) {
if (c == '\n') {
s[i] = c;
++i;
}
s[i] = '\0';
}
return i;
}
/* copy: cope 'from' in 'to'; assume to is big enough */
void copy(char to[], char from[])
{
int i;
i = 0;
while ((to[i] = from[i]) != '\0')
++i;
}