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

int main(int argc, char *argv[]) {
  FILE * in_file;
  int i, error = 0;
  char c;
  
  if(argc == 1) {
    in_file = stdin;
    for(c = fgetc(in_file); c != EOF; c = fgetc(in_file)) {
      fprintf(stdout, "%c", c);
    }
  }

  for(i = 1; i < argc; i++) {
    if(argv[i][0] == '-' && argv[i][1] == '\0')
      in_file = stdin;
    else {
      in_file = fopen(argv[i], "r");
      if(in_file == NULL) {
        fprintf(stderr, "Cannot find file %s\n", argv[i]);
        error = 1;
	continue;
      }
    }
    for(c = fgetc(in_file); c != EOF; c = fgetc(in_file))
      fprintf(stdout, "%c", c);
  }

  if(error)
    return 1;
  else
    return 0;
}