pattern.c

#include <stdio.h>
#define MAXLINE 1000
int gettline(char line[], int max);
int strindex(char source[], char searchfor[]);
char pattern[] = "ould";
main()
{
	char line[MAXLINE];
	int found = 0;
	while(gettline(line, MAXLINE) > 0)
		if(strindex(line, pattern) >= 0) {
			found++;
			printf("%s -- %d", line, found);
			
		}
	
	return found;
}
int gettline(char s[], int lim)
{
	int c,i;
	i = 0;
	while(--lim > 0 && (c = getchar()) != EOF&& c!='\n')
		s[i++] = c;
	if(c == '\n')
		s[i++] = c;
	s[i]='\0';
	return i;
}
int strindex(char s[], char t[])
{
	int i,j,k;

	for(i=0; s[i]!='\0';i++){
		for(j=i, k=0;t[k]!='\0'&&s[j]==t[k];j++,k++);
		if(k>0&&t[k] =='\0')
			return i;
	}
	return -1;
}