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

int main(void)
{
	char * pluralize(char * word);

	printf("Enter word to pluralize:");
	char word[30];
	char * plural;

	scanf("%s", word);

	plural = pluralize(word);

	if (strcmp(plural, "NULL") == 0) {
		printf("not a string.\n");
		return EXIT_SUCCESS;
	}

	printf("plural is %s\n", plural);

	int i;
	for (i = 0; i <50; i++)
		printf("%c", plural[i]);
	printf("\n");

	return EXIT_SUCCESS;
}

char * pluralize(char * word) {
	char * plural;
	strcpy(plural, word);
	printf("plural = %s. word = %s\n\n", plural, word);

	int i = 0;
	int location = 0;
/*
	for (i = 0; i < 30; i++) {
		if (word[i] == '\0')
			break;
		else
			return("NULL");
	}
*/
	char temp;
	for (i = 0; plural[i] != '\0'; i++) {
		temp = plural[i];
		location = i;
		printf("location = %d\n", location);
	}

	if (temp == 's') {
		plural[location + 1] = 'e';
		plural[location + 2] = 's';
		plural[location + 3] = '\0';
	}
	else {
		plural[location + 1] = 's';
		plural[location + 2] = '\0';
	}
	printf("plural = %s.\n", plural);

	return (plural);
}