Header and source file organization - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to include the header file in the source file.

C

#include [1]

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

A"stdio.h"

B<stdio.h>

C<myheader.h>

D"myheader.h"

Attempts:

3 left

💡 Hint

Common Mistakes

Using angle brackets for your own header files.

Forgetting the quotes or brackets around the header name.

Header files you create are included with double quotes, like "myheader.h".

2fill in blank

medium

Complete the header guard to prevent multiple inclusion.

C

#ifndef [1]
#define MYHEADER_H

// function declarations

#endif

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

AMYHEADER_H

BMY_HEADER_H

Cmyheader_h

DMYHEADER

Attempts:

3 left

💡 Hint

Common Mistakes

Using different macro names in #ifndef and #define.

Using lowercase or missing underscores.

The macro name in the #ifndef must match the one in #define exactly, usually uppercase with underscores.

3fill in blank

hard

Fix the error in the header file to correctly match the header guard macro.

C

#ifndef [1]
#define MY_HEADER_H

void greet();

#endif

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

AMYHEADER_H

BMY_HEADER_H

CMYHEADERH

DMY_HEADERH

Attempts:

3 left

💡 Hint

Common Mistakes

Missing underscores in macro names.

Mismatch between #ifndef and #define macro names.

The macro name must be consistent and match the #define exactly, including underscores.

4fill in blank

hard

Fill both blanks to declare and define a function properly across header and source files.

C

// In myheader.h
void [1]();

// In mysource.c
#include "myheader.h"

void [2]() {
    printf("Hello!\n");
}

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

Agreet

Bhello

Cprint

DsayHello

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names in declaration and definition.

Forgetting to include the header file in the source file.

The function name must be the same in both declaration and definition to link correctly.

5fill in blank

hard

Fill all three blanks to create a dictionary-like structure using structs and initialize it.

C

typedef struct {
    char* [1];
    int [2];
} [3];

[3] item = {"apple", 5};

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

Aname

Bquantity

CItem

Dvalue

Attempts:

3 left

💡 Hint

Common Mistakes

Using inconsistent field names.

Not matching the struct type name in declaration and initialization.

Struct fields represent properties like name and quantity, and the struct type is named Item.