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Quest: page 17

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• Verify that the expression getchar() != EOF is 0 or 1
• Write a program to print the value of EOF

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EOF definition

/* The value returned by fgetc and similar functions to indicate the
   end of the file.  */
#define EOF (-1)

eof

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

int main() {
  int c;
  int status;

  //print the value of EOF
  printf("EOF: %d\n",EOF);

  while (1) {
    // status == 0 break the loop
    // status == 1 continue read chars
    status = (c = getchar()) != EOF;
    printf("status: %d\n", status);
    // NOTE: print out the status if u like
    // printf("status: %d\n", status);
    if (status == 0) {
      break;
    }
    putchar(c);
  }
  return EXIT_SUCCESS;
}

thoughts:

• the value of EOF is a macro defined in stdlib.h on my machine which is a x86 GNU/linux.