/* 'strstr' searches for a substring in a string */

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

int main()
{
	char string1[1024];
	char strings[20][10];
	char *position;
	FILE *fileptr;
	int i, j;

	/* open the file of dictionary words */
	fileptr = fopen("words.txt", "r");

	/* read the 10 words in the file into the 2D array of characters,
           treating them as a 1D array of strings */
	for (i = 0; i < 10; i++) {
		fgets(strings[i], 10, fileptr);

		/* now go through each string and get rid of the newline character
                   at the end of the line, replacing it with a NULL */
		for (j = 0; j < 10; j++)
			if (strings[i][j] == 10)
				strings[i][j] = 0;

		/* print them off just to be sure everything's ok */
		printf("Read string: %s\n", strings[i]);
	}
	fclose(fileptr);

	/* open the file containing the large string */
	fileptr = fopen("large_string.txt", "r");

	/* grab it */
	fgets(string1, 1024, fileptr);

	fclose(fileptr);

	/* now look through the large string for each word in the list */
	for (i = 0; i < 10; i++) {
		printf("Searching for string %s...\n", strings[i]);
		position = strstr(string1, strings[i]);
		if (position != NULL)
			printf("Found string %s at position %d\n", strings[i], position);
	}


}