My code assumes that only valid inputs are given :P.
#include <stdio.h>
#include <ctype.h>
#define MAX_CHARACTERS 1000
#define MAX_LINE 100
int main(int argc, char *argv[]){
FILE *stream = fopen(argv[1], "r");
if(stream == NULL){
printf("The file %s doesn't exist.\n", argv[1]);
return...