Static storage class - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a static variable inside a function.

C

void func() {
    static int [1] = 0;
    [1]++;
    printf("%d\n", [1]);
}

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

Anum

Bcount

Cvalue

Dtemp

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-static variable which resets every function call.

Forgetting to use the same variable name in all places.

The variable count is declared as static inside the function, so it keeps its value between calls.

2fill in blank

medium

Complete the code to declare a static global variable.

C

[1] int counter = 0;

void increment() {
    counter++;
}

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Aregister

Bextern

Cauto

Dstatic

Attempts:

3 left

💡 Hint

Common Mistakes

Using extern which declares an external variable.

Using auto or register which are for local variables.

Using static before a global variable limits its scope to the current file.

3fill in blank

hard

Fix the error in the code by completing the declaration of a static variable inside a function.

C

void demo() {
    [1] int x = 5;
    x++;
    printf("%d\n", x);
}

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

Aauto

Bregister

Cstatic

Dextern

Attempts:

3 left

💡 Hint

Common Mistakes

Using auto or register which are for automatic variables.

Using extern which is for external linkage.

The static keyword makes the variable x keep its value between function calls.

4fill in blank

hard

Fill both blanks to create a static variable inside a function and print its value.

C

void count_calls() {
    [1] int calls = 0;
    calls[2];
    printf("Calls: %d\n", calls);
}

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Astatic

B++

C--

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-static variable which resets every call.

Using the wrong operator to change the variable.

The variable calls is static and incremented each time the function runs.

5fill in blank

hard

Fill all three blanks to declare a static variable, increment it, and print its value.

C

void func() {
    [1] int num = 0;
    num[2];
    printf("Number: %d\n", [3]);
}

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

Astatic

B++

Cnum

D--

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to declare the variable as static.

Using the wrong variable name in the print statement.

The static variable num is incremented and printed each time func is called.