## Nov 15, 2011

### K&R C Program Exercise 1-16

K and R solutions to Revise the the main routine of the longest-line program so it will correctly print the length of arbitrarily long input lines, and as much as possible of the text. K and R C Programs Exercises provides the solution to all the exercises in the C Programming Language, second addition, by Brian W.Keringhan and Dennis M.Ritchie(Prentice Hall,1988). You can learn and solve K&R C Programs Exercise. Read more about C Programming Language .

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#include "stdio.h"

#define MAXINLINE 1000 /* maximum input line size */

int getline(char line[], int MAXINLINE);
void copy(char to[], char from[]);

/* print longest input line */
int main(void)
{
int len;               /* current line length */
int max;               /* maximum length seen so far */
char line[MAXINLINE];    /* current input line */
char longest[MAXINLINE]; /* longest line saved here */

max = 0;

while((len = getline(line, MAXINLINE)) > 0)
{
printf("%d: %s", len, line);

if(len > max)
{
max = len;
copy(longest, line);
}
}
if(max > 0)
{
printf("Longest LINE IN THE PROGRAM is %d characters:\n%s", max, longest);
}
printf("\n");
return 0;
}

/* getline: read a line into s, return length */
int getline(char s[], int line)
{
int c, i, j;

for(i = 0, j = 0; (c = getchar())!=EOF && c != '\n'; ++i)
{
if(i < line - 1)
{
s[j++] = c;
}
}
if(c == '\n')
{
if(i <= line - 1)
{
s[j++] = c;
}
++i;
}
s[j] = '\0';
return i;
}

/* copy: copy 'from' into 'to'; assume 'to' is big enough */
void copy(char to[], char from[])
{
int k;

k = 0;
while((to[k] = from[k]) != '\0')
{
++k;
}
}

```
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