Chapter 7

1: Determine which expressions are true and which are false.

  1. 100 > 3 && 'a'>'c'

  2. 100 > 3 || 'a'>'c'

  3. !(100>3)

A1: True: b.
2: Construct an expression to express the following conditions:

  1. number is equal to or greater than 1 but smaller than 9.

  2. ch is not a q or a k character.

  3. number is between 1 and 9 but is not a 5.

  4. number is not between 1 and 9.

A2:

  1. number >= 1 && number < 9

  2. ch != 'q' && ch != 'k'

  3. (number >= 1 && number <= 9) && number != 5

  4. !( (number >= 1 && number <= 9) or else number < 1 || number > 9

3: The following program has unnecessarily complex relational expressions as well as some outright errors. Simplify and correct it.
 #include <stdio.h> int main(void) /* 1 */ { /* 2 */ int weight, height; /* weight in lbs, height in inches */ /* ...

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