Unnamed

#include <stdio.h>#include <stdlib.h>#include <stddef.h>#include <string.h>#include <ctype.h>#define MAX_LINE_SIZE 100#define MAX_WORD_SIZE 100/* globals */char wordBuffer[MAX_WORD_SIZE + 1] = {'\0'};char* readWord(FILE* fp, int retainCase){	int i = 0;	int charCount = 0;	char current = getc(fp);	while(current != ' ' && current != EOF && charCount < MAX_WORD_SIZE){		if(current != ' '){		if(!retainCase) current = tolower(current);		if(isalpha(current)){			wordBuffer[i++] = current;			charCount++;		}		current = getc(fp);		}	}	if(i == 0) return NULL;	else{		wordBuffer[i] = '\0';		return wordBuffer;	}}int main(int argc, char *argv[]){	int returnValue = EXIT_SUCCESS;	int retainCase = 0;	int error = 0;	char *currentStr = NULL;	FILE* fileIn = stdin;	if(argc > 3) error = 1;	else if(argc == 3){		if(strcmp(argv[1], "-c") == 0) {			retainCase = 1;			fileIn = fopen(argv[2], "r");		}		else error = 1;        }        else if(argc == 2){		if(strcmp(argv[1], "-c") == 0){			error = 1;		}		else{			fileIn = fopen(argv[1], "r");		}		      }	if(error || fileIn == NULL){		fprintf(stderr,"Usage: countWords [-c] [file]\n");		returnValue = EXIT_FAILURE;	}	else{		currentStr = readWord(fileIn,retainCase);		while(currentStr != NULL){			fputs(currentStr, stdout);			fprintf(stdout,"\n");			currentStr = readWord(fileIn,retainCase);		}	}	return returnValue;}