ET156 – Introduction to C Programming

Loop Review

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

Loop Review

Loop Review

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

Loop Review

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

value.

Loop Review

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 Review

Loop Review

What type of loop always executes at least once?

a. Sentinel-controlled loopb. For loopc. Do-while loopd. Counter-controlled loop

Loop Review

Pointers

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

Process Flow

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

Integers

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

a. Trueb. False

ASCII codes

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

a. X b. ac. A d. 6

ArraysThe subscript of the first

element in an array is 0.

The Eight Elements of Array x

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Figure 8.2 Arrays answer and score

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Figure 8.3 Program to Print a Table of Differences

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Figure 8.3 Program to Print a Table of Differences (cont’d)

Functions and arrays

A function’s return type cannot be an array.

Function fill_array

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. Enumerationb. Multidimensional arrayc. Parallel arraysd. Stack

Function to Add Two Arrays

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Function Data Areas for add_arrays(x, y, x_plus_y, 5);

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

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.

All elements in a multidimensional array have the same data type.

int i = 0;myArray[]= {2, 4, 6, 8, 10, 12, 14, 16, 18, 20}while (i < 10){

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

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

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?

int x = 0, n = 2;do

{x *= n + 1;n++;

}while (n < 10);

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

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

What type of loop always executes at least once?a. Sentinel-controlled loopb. For loopc. Do-while loopd. Counter-controlled loop

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

event hasoccurred or not is called?

a. an accumulatorb. a flagc. an increment operatord. a sentinel value

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

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

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");

}

 

a. Nothingb. Old enough to votec. Old enough to vote Old enough to drinkd. Old enough to drive Old enough to vote Old enough to drink

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. 14.20b. 14.04c. 4.20d. 4.04

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);

}

}

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);} 

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

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

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

The statements within a while loop execute _________________________.

a. at least once and continue executing until the loop repetition conditionbecomes trueb. at least once and continue executing until the loop repetition conditionbecomes falsec. until the loop repetition condition becomes false and might neverexecuted. until the loop repetition condition becomes true and might neverexecute

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

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

a. True

b. False