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


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

	if(argc != 2){
		printf("Wrong number of arguments!\n");
		exit(EXIT_FAILURE);
	}

	char ch;
	FILE * fp = fopen(argv[1], "r");

	if(fp == NULL) {
		printf("Error opening file!\n");
		exit(EXIT_FAILURE);
	}

	 while((ch = fgetc( fp )) != EOF) {

	     if(isupper(ch)) {
             ch = ch + 32;
         }
	     printf("%c", ch);

     }

	 fclose(fp);

	return EXIT_SUCCESS;
}