Multiple input and output in C++ - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to read two integers from input.

C++

#include <iostream>

int main() {
    int a, b;
    std::cin >> [1] >> b;
    std::cout << a + b << std::endl;
    return 0;
}

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

Aa

Bc

Cx

Dnum

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable not declared.

Mixing variable names.

The variable a is declared and should be used to read the first integer input.

2fill in blank

medium

Complete the code to output the product of two integers.

C++

#include <iostream>

int main() {
    int x = 4, y = 5;
    std::cout << x [1] y << std::endl;
    return 0;
}

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

A+

B-

C*

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using addition instead of multiplication.

Using division or subtraction by mistake.

The multiplication operator * is used to calculate the product of two numbers.

3fill in blank

hard

Fix the error in the code to correctly read three integers and output their sum.

C++

#include <iostream>

int main() {
    int a, b, c;
    std::cin >> a >> b >> [1];
    std::cout << a + b + c << std::endl;
    return 0;
}

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

Ad

Bc

Ce

Dx

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable not declared.

Typo in variable name.

The variable c is declared and should be used to read the third integer input.

4fill in blank

hard

Fill both blanks to read two floats and output their average.

C++

#include <iostream>

int main() {
    float [1], [2];
    std::cin >> a >> b;
    std::cout << (a + b) / 2 << std::endl;
    return 0;
}

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

Aa

Bb

Cx

Dy

Attempts:

3 left

💡 Hint

Common Mistakes

Declaring variables different from those used in input.

Using undeclared variables.

The variables a and b are used to read the two float inputs.

5fill in blank

hard

Fill all three blanks to read three integers and output their maximum.

C++

#include <iostream>
#include <algorithm>

int main() {
    int [1], [2], [3];
    std::cin >> x >> y >> z;
    int max_val = std::max([1], std::max([2], [3]));
    std::cout << max_val << std::endl;
    return 0;
}

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

Ax

By

Cz

Dw

Attempts:

3 left

💡 Hint

Common Mistakes

Using undeclared variables.

Mixing variable names between declaration and usage.

The variables x, y, and z are declared and used to read input and find the maximum.