Using return codes - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to return success from main.

C

int main() {
    return [1];
}

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

AEXIT_SUCCESS

B1

C0

D-1

Attempts:

3 left

💡 Hint

Common Mistakes

Returning 1 or -1 means an error occurred.

Using EXIT_SUCCESS requires including .

Returning 0 from main means the program ended successfully.

2fill in blank

medium

Complete the code to return an error code 1 from main.

C

int main() {
    return [1];
}

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

A1

B0

CEXIT_FAILURE

D-1

Attempts:

3 left

💡 Hint

Common Mistakes

Returning 0 means success, not error.

EXIT_FAILURE requires including .

Returning 1 from main indicates an error occurred.

3fill in blank

hard

Fix the error in the return statement to indicate failure.

C

int main() {
    return [1];
}

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

A2

B0

CEXIT_SUCCESS

DEXIT_FAILURE

Attempts:

3 left

💡 Hint

Common Mistakes

Returning 0 means success, not failure.

Using numbers like 2 is less clear than EXIT_FAILURE.

Using EXIT_FAILURE clearly shows failure and is portable.

4fill in blank

hard

Fill both blanks to return success or failure based on condition.

C

int check(int value) {
    if (value > 0) {
        return [1];
    } else {
        return [2];
    }
}

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

AEXIT_SUCCESS

BEXIT_FAILURE

C0

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 and 1 directly without macros.

Returning success for negative values.

Return EXIT_SUCCESS for positive values and EXIT_FAILURE otherwise.

5fill in blank

hard

Fill all three blanks to return codes based on input.

C

int status(int code) {
    switch(code) {
        case 0:
            return [1];
        case 1:
            return [2];
        default:
            return [3];
    }
}

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

AEXIT_SUCCESS

BEXIT_FAILURE

C1

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Returning 0 for failure cases.

Not handling default case properly.

Return EXIT_SUCCESS for 0, EXIT_FAILURE for 1, and 1 for others.