Define macro - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a macro named PI with the value 3.14.

C

#define [1] 3.14

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API

Bpi

CRadius

DCircle

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase macro names which is not a convention.

Forgetting to use #define keyword.

The macro name should be PI to represent the constant value 3.14.

2fill in blank

medium

Complete the code to define a macro named MAX that returns the maximum of two values a and b.

C

#define MAX(a, b) ((([1]) > (b)) ? (a) : (b))

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AMAX

Ba

Cx

Db

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping a and b in the comparison.

Using the macro name inside the macro definition.

The macro compares a and b to return the maximum value.

3fill in blank

hard

Fix the error in the macro definition to correctly square a number x.

C

#define SQUARE(x) (([1]) * ([1]))

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Ax

BX

Cx + 1

Dx * 2

Attempts:

3 left

💡 Hint

Common Mistakes

Using uppercase X which is undefined.

Using expressions instead of the parameter.

The macro should use the parameter x exactly as given to correctly compute the square.

4fill in blank

hard

Fill both blanks to define a macro named MIN that returns the minimum of two values a and b.

C

#define MIN(a, b) ((a) [1] (b) ? (a) : (b))

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A!=

B>

C==

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using greater than operator which returns the maximum instead.

Using equality or inequality operators which do not find minimum.

The macro uses the less than operator < to find the minimum value.

5fill in blank

hard

Fill all three blanks to define a macro named ABS that returns the absolute value of x.

C

#define ABS(x) ((([1]) < 0) ? -([2]) : [3])

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Ax

Dy

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names instead of x.

Forgetting to negate x when it is negative.

The macro checks if x is less than zero, then returns its negation; otherwise, returns x.