TCPL: Exercise 1-6 - Verify expression getchar() != EOF is 0 or 1

Put getchar() != EOF inside printf to test.

Signed-off-by: Ino Gamalinda <ino.gamalinda@teamcodeflux.com>
Merge branch 'exercise-1-6' into chapter-1
TCPL: Exercise 1-7 - Write a program to print the value of EOF

Put EOF as parameter in printf.

Signed-off-by: Ino Gamalinda <ino.gamalinda@teamcodeflux.com>
Merge branch 'exercise-1-7' into chapter-1