Operator Precedence and Associativity Worksheet Solution

CS 116

Oct. 23, 2000

Assuming the following values:

int x = 11;
int y = 6;
int z = 1;
char c = 'k';   /* 'k' = 107 */
char d = 'y';   /* 'y' = 121 */

1. x > 9 && y != 3

   ((x > 9) && (y != 3))
   (true && true)
   true
   

2. x == 5 || y != 3

   ((x == 5) || (y != 3))
   (false || true)
   true
   

3. !(x > 14)

   (!(x > 14))
   (!false)
   true
   

4. !(x > 9 && y != 23)

   !(((x > 9) && (y != 23)))
   !((true && true))
   !(true)
   false
   

5. x <= 1 && y == 6 || z < 4

   (((x <= 1) && (y == 6)) || (z < 4))
   ((false && true) || true)
   (false || true)
   true
   

6. c >= 'a' && c <= 'z'

   'a' = 97, 'z' = 122

   ((c >= 'a') && (c <= 'z'))
   (true && true)
   true
   

7. c >= 'A' || c <= 'Z'

   'A' = 65, 'Z' = 90

   ((c >= 'A') || (c <= 'Z'))
   (true || false)
   true
   

8. c != d && c != '\n'

   '\n' = 10

   ((c != d) && (c != '\n'))
   (true && true)
   true
   

9. 5 && y != 8 || false

   ((5 && (y != 8)) || false)
   

   Invalid expression: can't convert 5 to boolean.

10. x >= y >= z

    ((x >= y) >= z)
    

    Invalid expression: can't convert boolean ((x >= y)) to int.