What is the output of the following code if the input is "1 2 3": #include using namespace std; int main(){ int num1, num2, num3; double average; cin >> num1 >» num2 >> num3; average = (num1 + num2 + num3) / 3.0; cout <« average <« endl; cin.ignore(); return e; }
What is the output of the following code if the input is "1 2 3": #include using namespace std; int main(){ int num1, num2, num3; double average; cin >> num1 >» num2 >> num3; average = (num1 + num2 + num3) / 3.0; cout <« average <« endl; cin.ignore(); return e; }
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
![### Understanding the Output of a C++ Program
#### Problem Statement
**Question:** What is the output of the following C++ code if the input is `"1 2 3"`?
```cpp
#include <iostream>
using namespace std;
int main(){
int num1, num2, num3;
double average;
cin >> num1 >> num2 >> num3;
average = (num1 + num2 + num3) / 3.0;
cout << average << endl;
cin.ignore();
return 0;
}
```
#### Explanation
1. **Include Directive**:
- `#include <iostream>` is used to include the standard input-output stream library, which allows the use of `cin` and `cout`.
2. **Namespace**:
- `using namespace std;` allows you to use all elements in the `std` namespace without prefixing them with `std::`.
3. **Variable Declaration**:
- `int num1, num2, num3;` declares three integer variables.
- `double average;` declares a double variable to store the average.
4. **Input Operations**:
- `cin >> num1 >> num2 >> num3;` takes three integer inputs from the user and assigns them to `num1`, `num2`, and `num3`.
5. **Calculation**:
- `average = (num1 + num2 + num3) / 3.0;` calculates the average of the three numbers. The division is done using a floating-point number (`3.0`) to ensure the result is a double.
6. **Output**:
- `cout << average << endl;` outputs the computed average followed by a newline.
7. **Program Termination**:
- `cin.ignore();` is used to ignore any additional input or newline characters.
- `return 0;` signifies the successful completion of the program.
#### Sample Output
For the input `"1 2 3"`, the program will compute the average as:
\[ \text{average} = \frac{1 + 2 + 3}{3.0} = 2.0 \]
**Output:** `2` (formatted as a floating-point number, but displayed without decimal places since the `.0` is not shown by default with standard output settings)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5e343f85-ac09-4dac-ae1f-fa90b444949b%2Faf8414e1-337a-4c55-ab95-dc2fbae4d97c%2Fyy1zyz4_processed.png&w=3840&q=75)
Transcribed Image Text:### Understanding the Output of a C++ Program
#### Problem Statement
**Question:** What is the output of the following C++ code if the input is `"1 2 3"`?
```cpp
#include <iostream>
using namespace std;
int main(){
int num1, num2, num3;
double average;
cin >> num1 >> num2 >> num3;
average = (num1 + num2 + num3) / 3.0;
cout << average << endl;
cin.ignore();
return 0;
}
```
#### Explanation
1. **Include Directive**:
- `#include <iostream>` is used to include the standard input-output stream library, which allows the use of `cin` and `cout`.
2. **Namespace**:
- `using namespace std;` allows you to use all elements in the `std` namespace without prefixing them with `std::`.
3. **Variable Declaration**:
- `int num1, num2, num3;` declares three integer variables.
- `double average;` declares a double variable to store the average.
4. **Input Operations**:
- `cin >> num1 >> num2 >> num3;` takes three integer inputs from the user and assigns them to `num1`, `num2`, and `num3`.
5. **Calculation**:
- `average = (num1 + num2 + num3) / 3.0;` calculates the average of the three numbers. The division is done using a floating-point number (`3.0`) to ensure the result is a double.
6. **Output**:
- `cout << average << endl;` outputs the computed average followed by a newline.
7. **Program Termination**:
- `cin.ignore();` is used to ignore any additional input or newline characters.
- `return 0;` signifies the successful completion of the program.
#### Sample Output
For the input `"1 2 3"`, the program will compute the average as:
\[ \text{average} = \frac{1 + 2 + 3}{3.0} = 2.0 \]
**Output:** `2` (formatted as a floating-point number, but displayed without decimal places since the `.0` is not shown by default with standard output settings)
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The output of the code will be 2.
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