pra1-17.c

#include <stdio.h>
#define MAXLINE 1000

int getline(char s[], int lim);

int main (int argc, char const *argv[])
{
	int len;
	char line[MAXLINE];
	while ((len = getline(line, MAXLINE)) > 0)
	{
		if (len > 80)
			printf("%s", line);
	}
	return 0;
}

int getline(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;
	}
	else if (c == EOF && i > 0)
	{
		s[i] = '\n';
		++i;
	}
	s[i] = '\0';
	return i;
}