Structure of a C program - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to include the standard input-output header.

C

#include [1]

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A<string.h>

B<stdlib.h>

C"myheader.h"

D<stdio.h>

Attempts:

3 left

💡 Hint

Common Mistakes

Using instead of for input-output functions.

Forgetting the angle brackets around the header name.

The #include <stdio.h> directive includes the standard input-output library needed for functions like printf.

2fill in blank

medium

Complete the code to define the main function that returns an integer.

C

[1] main() {
    return 0;
}

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Avoid

Bint

Cfloat

Dchar

Attempts:

3 left

💡 Hint

Common Mistakes

Using void as the return type for main.

Using data types like float or char for main.

The main function should return an int to indicate the program's exit status.

3fill in blank

hard

Fix the error in the code by completing the statement to print "Hello, World!".

C

#include <stdio.h>

int main() {
    [1]("Hello, World!\n");
    return 0;
}

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Aprintf

Bprintln

Cprint

Dcout

Attempts:

3 left

💡 Hint

Common Mistakes

Using print or println which are not valid in C.

Using cout which is from C++.

The correct function to print formatted output in C is printf.

4fill in blank

hard

Fill both blanks to declare a variable and assign it a value inside main.

C

int main() {
    [1] [2] = 10;
    return 0;
}

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Aint

Bfloat

Cnumber

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Using float when the value is an integer.

Using invalid variable names like number which is not declared.

To declare an integer variable named count, use int count = 10;.

5fill in blank

hard

Fill all three blanks to complete a simple C program that prints a variable's value.

C

#include <stdio.h>

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

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

Aint

Cnum

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names in declaration and print statement.

Using void as return type for main.

The main function returns int. Declare an integer variable num and print it.