What is wrong with the following code segment... DIDDI ... Given the following program to calculate the square of a num int square(int number) { return number * number; } int main() { cout << square(7.5)

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
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In C++
**Problem with the Code Segment**

The code segment attempts to calculate the square of a number using a function. Below is the provided code:

```cpp
int square(int number)
{
    return number * number;
}
int main()
{
    cout << square(7.5);
}
```

**Explanation:**

1. **Function Definition:**
   - The function `square` is defined to take an integer parameter `number` and return the square of `number`.

2. **Issue in the Code:**
   - The function `square` is called with a floating-point number `7.5` in the `main` function.
   - Since the `square` function is defined to accept an integer (`int`), passing a `double` will cause implicit type conversion.

3. **Potential Problems:**
   - The value `7.5` will be truncated to `7` when passed to the function, potentially leading to an incorrect result of `49` instead of `56.25`.

**Resolution:**

To fix this issue, the function should be revised to accept a `double` as an argument:

```cpp
double square(double number)
{
    return number * number;
}

int main()
{
    cout << square(7.5);
}
```
This modification ensures that the function can correctly handle and return the square of a floating-point number without truncation errors.
Transcribed Image Text:**Problem with the Code Segment** The code segment attempts to calculate the square of a number using a function. Below is the provided code: ```cpp int square(int number) { return number * number; } int main() { cout << square(7.5); } ``` **Explanation:** 1. **Function Definition:** - The function `square` is defined to take an integer parameter `number` and return the square of `number`. 2. **Issue in the Code:** - The function `square` is called with a floating-point number `7.5` in the `main` function. - Since the `square` function is defined to accept an integer (`int`), passing a `double` will cause implicit type conversion. 3. **Potential Problems:** - The value `7.5` will be truncated to `7` when passed to the function, potentially leading to an incorrect result of `49` instead of `56.25`. **Resolution:** To fix this issue, the function should be revised to accept a `double` as an argument: ```cpp double square(double number) { return number * number; } int main() { cout << square(7.5); } ``` This modification ensures that the function can correctly handle and return the square of a floating-point number without truncation errors.
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