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ET156 – Introduction to C Programming. Topic Reviews For Unit 5 - 6. Loop Review. The statements within a while loop execute until the loop repetition condition becomes false and might never execute. Loop Review. Loop Review.

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loop review
Loop Review

The statements within a while loop execute until the loop repetition condition becomes false and might never execute.

loop review2
Loop Review

A variable used to store a value being computed in increments during a loop’s execution is called an accumulator.

loop review3
Loop Review

A for loop can either increment or decrement the loop control variable’s value by any

value.

loop review5
Loop Review

You want to write a program that prompts the user for a value until the user enters -1.

This is an example of a sentinel-controlled loop.

loop review7
Loop Review

What type of loop always executes at least once?

a. Sentinel-controlled loop

b. For loop

c. Do-while loop

d. Counter-controlled loop

pointers
Pointers

A variable that has a memory address as its value is called a pointer.

process flow
Process Flow

The process of testing flow of control between a main function and its subordinate functions is called top-down testing.

integers
Integers

Loss of accuracy due to round-off errors may occur when performing mathematical operators with integer values.

a. True

b. False

ascii codes
ASCII codes

Which of the following characters has the lowest valued ASCII character code?

a. X b. a

c. A d. 6

arrays
Arrays

The subscript of the first element in an array is 0.

The Eight Elements of Array x

functions and arrays
Functions and arrays

A function’s return type cannot be an array.

parallel arrays
Parallel Arrays

You need to store the average rainfall, high temperature, and low temperature for each day in

the year. Average rainfall must be stored as a double. Temperatures must be stored as integers. What type of data structure could you use?

a. Enumeration

b. Multidimensional array

c. Parallel arrays

d. Stack

stacks
Stacks

When using a stack, all new elements are added to the top of the stack.

Only the top element can be removed from the stack.

arrays and flags
Arrays and Flags

A program sets a flag within a loop to indicate when an element has been found in an array. This program is performing a linear search.

slide27

Copy this code. What changes are needed to make it work.

int i = 0;

myArray[]= {2, 4, 6, 8, 10, 12, 14, 16, 18, 20}

while (i < 10)

{

printf("%d, " myArray[i]);

}

The way that it is written, the value 2 will be output infinitely.

what will be the value of y after the following code executes
What will be the value of y after the following code executes?

int x = 0, n = 2;

do

{

x *= n + 1;

n++;

}while (n < 10);

a. 0 b. 1

c. 10 d. 11

slide29

You want to write a program that will loop until an event occurs. This is an example of ________________.

a. an accumulator-controlled loop

b. a conditional loop

c. a counter-controlled loop

d. a sentinel-controlled loop

slide30

What type of loop always executes at least once?

a. Sentinel-controlled loop

b. For loop

c. Do-while loop

d. Counter-controlled loop

A variable that stores a 1 or 0 that is used to indicate whether an event has

occurred or not is called?

a. an accumulator

b. a flag

c. an increment operator

d. a sentinel value

slide31

What will be the value of y after the following code executes?

int x = 0, n = 2;

do

{

x *= n + 1;

n++;

}while (n < 10);

a. 0 b. 1 c. 10 d. 11

slide32

What will be the value of x after executing the following code? int i, j, x=0;

for (i=0; i< 3; ++i)

{

for(j=1; j< 2; ++j)

{

x += i * j;

}

}

a. 0 b. 3 c. 6 d. 9

slide33

a. Nothing

b. Old enough to vote

c. Old enough to vote

Old enough to drink

d. Old enough to drive

Old enough to vote

Old enough to drink

Assume that age = 18. What will be the output of the following code?

switch (age) {

case 16:

case 17:

printf("Old enough to drive/n");

case 18:

case 19:

case 20:

printf("Old enough to vote/n");

case 21:

printf("Old enough to drink/n");

}

slide34

a. 14.20

b. 14.04

c. 4.20

d. 4.04

Assume that price = $4.00. What would be the value of total after executing the following code?

if (price > 100)

shipping = 20;

else if (price < 50)

shipping = 10;

else if (price < 5)

shipping = 0;

if (price > 10)

tax = price * 0.5;

else

tax = price * 0.1;

total = price + tax + shipping;

a 0 1 8 27 64 b 0 1 8 27 64 125 c 0 0 0 0 0 0 0 0 0 0 d no output
a. 0 1 8 27 64 b. 0 1 8 27 64 125c. 0.0 0.0 0.0 0.0 0.0 d. No output

What will the output be when the following code executes?

#define SIZE 5

int main(void)

{ int cubes, i;

for (i=0; i<SIZE; ++i)

{

cubes = i * i * i;

printf(“%f “, cubes);

}

}

slide36
a. 1, 2, 3, 4, 5, 6, 7, 8, 9b. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10c. No values will be output.d. The value 0 will be output infinitely.

What will be the output

when the code below executes?

int i = 0;

while (i < 10)

{

printf(" The value of i is: %d”, i);

}

slide37

You want to write a program that prompts the user for a value until the user enters -1. This is an example of ________________.a. an accumulator-controlled loopb. a conditional loopc. a counter-controlled loopd. a sentinel-controlled loop

slide38

A for loop _________________________________.a. will never result in an infinite loopb. increases the loop control variable’s value by 1 with every executionc. can increment the loop control variable’s value by any positive incrementd. can either increment or decrement the loop control variable’s value byany value

slide39

A variable used to store a value being computed in increments during a loop’s execution is called _____________________.

a. an accumulator

b. a flag

c. an increment operator

d. a sentinel value

slide40

The statements within a while loop execute _________________________.

    • a. at least once and continue executing until the loop repetition condition
    • becomes true
    • b. at least once and continue executing until the loop repetition condition
    • becomes false
    • c. until the loop repetition condition becomes false and might never
    • execute
    • d. until the loop repetition condition becomes true and might never
    • execute
slide41

The controlling expression for a switch statement can be of type

___________.

a. int, char, or double

b. int or double

c. int or char

d. char or double

slide42

Using nested if statements is more efficient than using a sequence of if statements.

a. True

b. False

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