Structure of a C++ program - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

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

C++

#include [1]

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A<vector>

B<stdio.h>

C<iostream>

D<string>

Attempts:

3 left

💡 Hint

Common Mistakes

Using which is a C library, not standard for C++ input/output.

Forgetting the angle brackets around the library name.

The <iostream> header is required for input and output operations in C++.

2fill in blank

medium

Complete the code to start the main function.

C++

int [1]() {
    return 0;
}

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Amain

Bstart

Cbegin

Dexecute

Attempts:

3 left

💡 Hint

Common Mistakes

Using other function names like start or begin which are not recognized as entry points.

Omitting the parentheses after the function name.

The main function is the entry point of every C++ program.

3fill in blank

hard

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

C++

#include <iostream>

int main() {
    std::cout [1] "Hello, World!" << 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 the extraction operator >> which is for input.

Using assignment or addition operators which are incorrect here.

The insertion operator << is used with std::cout to print output.

4fill in blank

hard

Fill both blanks to declare and initialize an integer variable named count with value 10.

C++

[1] [2] = 10;

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Aint

Bcount

Cfloat

Dnumber

Attempts:

3 left

💡 Hint

Common Mistakes

Using float instead of int for an integer variable.

Using invalid variable names or reserved words.

int declares an integer type, and count is the variable name.

5fill in blank

hard

Fill all three blanks to create a simple for loop that prints numbers 1 to 5.

C++

for (int [1] = 1; [2] <= 5; [3]++) {
    std::cout << i << std::endl;
}

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

Ai

Dj

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names in different parts of the loop.

Using a variable name not declared in the loop.

The variable i is used as the loop counter in all parts of the for loop.