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#include <stdio.h>
#define MAXLINE 1000 /* maximum input line size */
int getln(char line[], int maxline);
int rtrim(char line[], int len);
/* remove trailing blanks and tabs from each line of input */
int main()
{
int len; /* current line length */
char line[MAXLINE]; /* current input line */
while ((len = getln(line, MAXLINE)) > 0)
if ((len = rtrim(line, len)) > 0)
printf("%s", line);
return 0;
}
/* getln: read a line into s, return length */
int getln(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') {
s[i] = c;
++i;
}
return i;
}
/* rtrim: remove trailing blanks and tabs */
int rtrim(char s[], int len)
{
int nl = 0;
if (s[len-1] == '\n') {
nl = 1;
--len;
}
while (len > 0 && (s[len-1] == ' ' || s[len-1] == '\t'))
--len;
if (nl == 1) {
s[len] = '\n';
++len;
}
s[len] = '\0';
return len;
}
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