Function calling - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to call the function greet.

C

#include <stdio.h>

void greet() {
    printf("Hello!\n");
}

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

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Agreet()

Bgreet

Cgreet[]

Dcall greet()

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting the parentheses when calling the function.

Using incorrect syntax like brackets or keywords.

To call a function in C, you write its name followed by parentheses, like greet().

2fill in blank

medium

Complete the code to call the function add with arguments 5 and 3.

C

#include <stdio.h>

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

int main() {
    int result = [1];
    printf("%d\n", result);
    return 0;
}

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Aadd{5, 3}

Badd[5, 3]

Cadd 5, 3

Dadd(5, 3)

Attempts:

3 left

💡 Hint

Common Mistakes

Using spaces instead of parentheses for arguments.

Using brackets or braces instead of parentheses.

To call a function with arguments, use the function name followed by parentheses containing the arguments separated by commas, like add(5, 3).

3fill in blank

hard

Fix the error in the function call to multiply with arguments 4 and 7.

C

#include <stdio.h>

int multiply(int x, int y) {
    return x * y;
}

int main() {
    int product = multiply[1];
    printf("%d\n", product);
    return 0;
}

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A(4, 7)

B[4, 7]

C{4, 7}

D4, 7

Attempts:

3 left

💡 Hint

Common Mistakes

Using square brackets or curly braces instead of parentheses.

Omitting parentheses entirely.

Function arguments must be inside parentheses separated by commas, like multiply(4, 7).

4fill in blank

hard

Fill both blanks to call the function divide with arguments 10 and 2, and store the result in result.

C

#include <stdio.h>

double divide(double a, double b) {
    return a / b;
}

int main() {
    double [1] = [2];
    printf("%.2f\n", result);
    return 0;
}

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Aresult

Bdivide(10, 2)

Cdivide(2, 10)

Dvalue

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable name different from the one printed.

Swapping the arguments in the function call.

You store the function call divide(10, 2) in the variable result.

5fill in blank

hard

Fill all three blanks to call the function power with base 3 and exponent 4, store the result in res, and print it.

C

#include <stdio.h>

int power(int base, int exp) {
    int result = 1;
    for (int i = 0; i < exp; i++) {
        result *= base;
    }
    return result;
}

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

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Ares

Bpower(3, 4)

Dresult

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names in declaration and print.

Calling the function with wrong arguments.

The variable res stores the result of power(3, 4), and we print res.