Using cin for input in C++ - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to read an integer from the user using cin.

C++

#include <iostream>
using namespace std;

int main() {
    int number;
    cin [1] number;
    cout << "You entered: " << number << endl;
    return 0;
}

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

A<<

B>>

C==

D>>=

Attempts:

3 left

💡 Hint

Common Mistakes

Using << instead of >> with cin.

Using assignment operator = instead of >>.

The operator >> is used with cin to take input from the user.

2fill in blank

medium

Complete the code to read a double value from the user using cin.

C++

#include <iostream>
using namespace std;

int main() {
    double value;
    cin [1] value;
    cout << "Value: " << value << endl;
    return 0;
}

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

A<<

B=

C==

D>>

Attempts:

3 left

💡 Hint

Common Mistakes

Using << instead of >> with cin.

Using assignment operator = instead of >>.

Use >> with cin to read input into variables.

3fill in blank

hard

Fix the error in the code to correctly read a string using cin.

C++

#include <iostream>
#include <string>
using namespace std;

int main() {
    string name;
    cin [1] name;
    cout << "Hello, " << name << "!" << endl;
    return 0;
}

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

A<<

B=

C>>

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using << instead of >> with cin.

Using = instead of >>.

Use >> with cin to read a string without spaces.

4fill in blank

hard

Fill both blanks to read two integers from the user and print their sum.

C++

#include <iostream>
using namespace std;

int main() {
    int a, b;
    cin [1] a [2] b;
    cout << "Sum: " << a + b << endl;
    return 0;
}

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

A>>

B<<

Attempts:

3 left

💡 Hint

Common Mistakes

Using << instead of >> for input.

Using only one operator for two variables.

Use >> twice to read two integers from the user.

5fill in blank

hard

Fill all three blanks to read a character, an integer, and a double, then print them.

C++

#include <iostream>
using namespace std;

int main() {
    char ch;
    int num;
    double val;
    cin [1] ch [2] num [3] val;
    cout << "Char: " << ch << ", Int: " << num << ", Double: " << val << endl;
    return 0;
}

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

A<<

B>>

Attempts:

3 left

💡 Hint

Common Mistakes

Using << instead of >> for input.

Missing one or more input operators.

Use >> three times to read the three values from the user.