Why modular programming is needed in C - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a function prototype for modular programming.

C

void [1]();

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

Acalculate

Bmain

Cprintf

Dreturn

Attempts:

3 left

💡 Hint

Common Mistakes

Using main as a prototype name here, which is reserved for the program entry point.

Using keywords like return instead of a function name.

The function prototype declares a function named calculate which can be defined separately, supporting modular programming.

2fill in blank

medium

Complete the code to call a function named processData.

C

[1]();

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Areturn

Bint

CprocessData

Dvoid

Attempts:

3 left

💡 Hint

Common Mistakes

Using return as a function call.

Using data types like int or void instead of the function name.

Calling the function processData executes the code inside that function, which is a key part of modular programming.

3fill in blank

hard

Fix the error in the function definition by completing the missing return type.

C

[1] add(int a, int b) {
    return a + b;
}

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Afloat

Bint

Cvoid

Dchar

Attempts:

3 left

💡 Hint

Common Mistakes

Using void which means no value is returned.

Using float or char which do not match the returned integer.

The function add returns the sum of two integers, so its return type must be int.

4fill in blank

hard

Fill both blanks to create a modular program that calls a function and prints the result.

C

#include <stdio.h>

int [1](int x, int y) {
    return x + y;
}

int main() {
    int result = [2](5, 3);
    printf("Result: %d\n", result);
    return 0;
}

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

Aadd

Bmain

Cprintf

Dreturn

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names for the function definition and call.

Using reserved function names incorrectly.

The function add is defined and called in main. This shows modular programming by separating the addition logic into its own function.

5fill in blank

hard

Fill all five blanks to complete a modular program with function declaration, definition, and call.

C

#include <stdio.h>

[1] [2](int a, int b);

int main() {
    int sum = [3](10, 20);
    printf("Sum is %d\n", sum);
    return 0;
}

[4] [5](int a, int b) {
    return a + b;
}

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

Aint

Bvoid

Cadd

Dmain

Attempts:

3 left

💡 Hint

Common Mistakes

Mismatching return types between declaration and definition.

Using different names for declaration, definition, and call.

The function add is declared and defined with return type int, and called in main. This modular approach separates declaration, definition, and usage.