PT 1420 Assignment 3
Short answers
5. What two things must you normally specify in a variable declaration?
You must specify the variable type and an identifier. int n; // type - int, identifier - n 6. What value is stored in uninitialized variables? is a variable that is declared but is not set to a definite known value before it is used.
Algorithm workbench
3. Write assignment statements that perform the following operations with the variables a, b, and c.
a. Adds 2 to a and stores the result in b
b. Multiplies b times 4 and stores the result in a
c. Divides a by 3.14 and stores the result in b
d. Subtracts 8 from b and stores the result in a
Assignment statements that perform operations with the variables a, b, and c* (*Actually none of these operations involves the variable c at all... is this an error, or a 'trick answer'?): b = a + 2 a = b * 4 b = a / 3.14 a = b – 8
4. Assume the variables result, w, x, y, and z are all integers, and that w = 5, x = 4, y = 8, and z = 2. What value will be stored in result in each of the following statements?
a. Set result = x + y
b. Set result = z * 2
c. Set result = y / x
d. Set result = y – z result = x++ - y;
Answer -4 result = 4 – 8 = -4 result = ++w + y;
Answer
w = w + 1 = 5 + 1 = 6 result = 6 + 8 = 14
5. Write a pseudocode statement that declares the variable cost so it can hold real numbers.
Declare Real price= 0.00
Display "the original price."
Input item original price
Display "price"
6. Write a pseudocode statement that declares the variable total so it can hold integers. Initialize the variable with the value 0.
Declare Real price= 0.00
Display "the original price."
Input item original price
Display "price"
7. Write a pseudocode statement that assigns the value 27 to the variable count. count := 27
8. Write a pseudocode statement that assigns the sum of 10 and 14 to the variable total.
/*Declare variables
Total (number (3)) = 0
A (number (2)) =10
B (number (2)) =14
Begin
5. What two things must you normally specify in a variable declaration?
You must specify the variable type and an identifier. int n; // type - int, identifier - n 6. What value is stored in uninitialized variables? is a variable that is declared but is not set to a definite known value before it is used.
Algorithm workbench
3. Write assignment statements that perform the following operations with the variables a, b, and c.
a. Adds 2 to a and stores the result in b
b. Multiplies b times 4 and stores the result in a
c. Divides a by 3.14 and stores the result in b
d. Subtracts 8 from b and stores the result in a
Assignment statements that perform operations with the variables a, b, and c* (*Actually none of these operations involves the variable c at all... is this an error, or a 'trick answer'?): b = a + 2 a = b * 4 b = a / 3.14 a = b – 8
4. Assume the variables result, w, x, y, and z are all integers, and that w = 5, x = 4, y = 8, and z = 2. What value will be stored in result in each of the following statements?
a. Set result = x + y
b. Set result = z * 2
c. Set result = y / x
d. Set result = y – z result = x++ - y;
Answer -4 result = 4 – 8 = -4 result = ++w + y;
Answer
w = w + 1 = 5 + 1 = 6 result = 6 + 8 = 14
5. Write a pseudocode statement that declares the variable cost so it can hold real numbers.
Declare Real price= 0.00
Display "the original price."
Input item original price
Display "price"
6. Write a pseudocode statement that declares the variable total so it can hold integers. Initialize the variable with the value 0.
Declare Real price= 0.00
Display "the original price."
Input item original price
Display "price"
7. Write a pseudocode statement that assigns the value 27 to the variable count. count := 27
8. Write a pseudocode statement that assigns the sum of 10 and 14 to the variable total.
/*Declare variables
Total (number (3)) = 0
A (number (2)) =10
B (number (2)) =14
Begin