#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#define MAXLINE 1000
#define QUIT "/q"

int getline(char [], int);
int string_search(char [], char []);

main()
{
	char line[MAXLINE];
	int len;

	while ((len = getline(line, MAXLINE)) > 0)
		if (strstr(line, QUIT))	/* strstr is the function you want */
			exit(0);	/* include string.h to use it */
					/* for more info on it, use google */
			
}

/* getline: read a line into s; return length */
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;
	s[i] = '\0';

	return i;
}