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#include <stdio.h>
#define MAXLEN 1000
int get_line(char line[], const int max);
int strindex(char source[], char pattern[]);
int
main(void)
{
int found, rightmost;
char line[MAXLEN];
char pattern[] = "ould";
found = 0;
while (get_line(line, MAXLEN) > 0)
if ((rightmost = strindex(line, pattern)) >= 0) {
printf("%s >> match at char %d\n", line, rightmost+1);
found++;
}
printf("\nSneedGrep found %d match%s\n", found, (found > 0) ? "es" : "");
return 0;
}
int
get_line(char line[], const int max)
{
int i;
char input;
for (i = 0; (input = getchar()) != EOF && input != '\n' && i < max-2; i++)
line[i] = input;
if (input == '\n' && i < max-2)
line[i++] = '\n';
line[i] = '\0';
return i;
}
int
strindex(char source[], char pattern[])
{
int i, j, k, rightmost;
rightmost = -1;
for (i = 0; source[i] != '\0'; i++) {
for (j = i, k = 0; pattern[k] != '\0' && source[j] == pattern[k]; j++, k++)
;
if (pattern[k] == '\0')
rightmost = i;
}
return rightmost;
}
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