C Primer Plus®, Third Edition

Review Questions

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

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

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

   3. !(100>3)

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.

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 */ /* 4 */ scanf("%d, weight, height); /* 5 */ if (weight < 100) /* 6 */ if (height >= 72) /* 7 */ printf("You are very tall for your weight.\n"); else if (height < 72 && ...