spell.c

/*
 * spell.c
 *
 *  Created on: Apr 13, 2015
 *      Author: Brett
 */

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

//gcc -o spell spellChecker.c

int main(int argc, char **argv[]) {

	size_t size = 50;
	int sizen = 100;
	char fileName[] = "words.txt";
	char dictName[] = "test.txt";

	char tempBuffer[sizen];
	char tempDictBuffer[sizen];

	FILE *dictInstream = fopen(dictName, "r");
	if (dictInstream == NULL) {
		fprintf(stderr, "Unable to open file: %s\n", dictName);
		exit(1);
	}
	int result = 0;

	FILE *instream = fopen(fileName, "r");
	if (instream == NULL) {
		fprintf(stderr, "Unable to open file: %s\n", fileName);
		exit(1);
	}

	//read the file, line by line
	printf("Misspelled words in words.txt :\n");
	while (fgets(tempBuffer, sizen, instream) != NULL) {

		tempBuffer[strlen(tempBuffer) - 1] = '\0';
		//remove the endline character from the line

		char *tempToken = strtok(tempBuffer, " ");
		//tokenize the line on space:

		while (tempToken != NULL)
		//will be null at the end of each line 
		{
			char *tempCheck = malloc(sizeof(char) * (strlen(tempToken) + 1));
			//build dynamic array to hold string to check
			strcpy(tempCheck, tempToken);

			while (fgets(tempDictBuffer, sizen, dictInstream) != NULL) {
				//compares against each line in dictionary

				tempDictBuffer[strlen(tempDictBuffer) - 1] = '\0';
				//remove the endline character from the line

				char *tempDict = malloc(
						sizeof(char) * (strlen(tempDictBuffer) + 1));
				//build dynamic array to hold string from dictionary
				strcpy(tempDict, tempDictBuffer);

				if (strcmp(tempCheck, tempDict) == 0) {
					printf("%s, %s match\n", tempCheck, tempDict);
					//if the string matches a dictionary line, this prints
					result = 1;
					//sets flag
				} else {
					printf("%s, %s do not match\n", tempCheck, tempDict);
					//if the string does not match, this prints
				}

				free(tempDict);
				tempDict = NULL;

			}
			if (result != 1) {
				printf("%s\n", tempCheck);
				//checks flag
			}
			result = 0;
			//resets flag
			free(tempCheck);
			tempCheck = NULL;
			tempToken = strtok(NULL, " ");
			//gets next token in line and reruns second while loop
		}
	}
	fclose(dictInstream);
	fclose(instream);

	return 0;
}

test.txt

A
AA
AAA
thirtytwomo
this
thisaway
contains
few
words
hello

words.txt

hello this contanes a few words 
they are seperated by multaple