Floating point cost on embedded systems in Embedded C - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a floating point variable.

Embedded C

float [1] = 3.14f;

Drag options to blanks, or click blank then click option'

Acount

BintVar

Cpi

Dindex

Attempts:

3 left

💡 Hint

Common Mistakes

Using integer-like variable names for floats.

The variable name pi is appropriate for a floating point value representing 3.14.

2fill in blank

medium

Complete the code to perform floating point addition.

Embedded C

float result = [1] + 2.5f;

Drag options to blanks, or click blank then click option'

A3.0f

Bindex

Ccount

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Using integers without 'f' suffix for float operations.

Use a floating point number like 3.0f to add with another float.

3fill in blank

hard

Fix the error in the floating point division.

Embedded C

float division = 5 / [1];

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A2

Bcount

C0

D2.0f

Attempts:

3 left

💡 Hint

Common Mistakes

Using integer divisor causing integer division.

Use a floating point divisor like 2.0f to get a floating point result.

4fill in blank

hard

Fill both blanks to create a float array and initialize it.

Embedded C

float [1][3] = {1.0f, [2], 3.0f};

Drag options to blanks, or click blank then click option'

Avalues

B2.0f

Ccount

Dindex

Attempts:

3 left

💡 Hint

Common Mistakes

Using integer literals instead of float literals in initialization.

The array name values is descriptive, and 2.0f is a float value to initialize the second element.

5fill in blank

hard

Fill all three blanks to compute the average of three floats.

Embedded C

float average = ([1] + [2] + [3]) / 3.0f;

Drag options to blanks, or click blank then click option'

Aval1

Bval2

Cval3

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Using integer variables or missing one of the variables in the sum.

Use the three float variables val1, val2, and val3 to calculate the average.