Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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### Generating Random Integers within a Specified Range

Given integer variables `seedVal`, `smallestValue`, and `largestValue`, output three random integers in the range of `smallestValue` to `largestValue` inclusive. Each output should end with a newline.

**Example:**

If `smallestValue` is 1 and `largestValue` is 94, then one possible output is:

```
82
75
72
```

Below is the C++ code snippet to achieve this task:

```cpp
#include <iostream>
#include <cstdlib>
using namespace std;

int main() {
    int seedVal;
    int smallestValue;
    int largestValue;

    cin >> seedVal;
    cin >> smallestValue;
    cin >> largestValue;

    srand(seedVal);

    /* Your code goes here */

    return 0;
}
```

### Explanation:

1. **Include Libraries:** The program includes the `iostream` and `cstdlib` libraries. `iostream` is used for input and output operations, while `cstdlib` provides functions for random number generation.
   
2. **Namespace Standard:** `using namespace std;` allows the program to use standard library components, such as `cin` and `cout`, without needing to prefix them with `std::`.

3. **Variable Declaration:** Three integer variables are declared:
    - `seedVal`: Used to seed the random number generator.
    - `smallestValue`: The lower bound of the random number range.
    - `largestValue`: The upper bound of the random number range.
   
4. **Input Operations:** The program reads the values for `seedVal`, `smallestValue`, and `largestValue` from standard input.

5. **Seed the Random Number Generator:** `srand(seedVal);` seeds the random number generator with the specified seed value to ensure reproducibility of the random numbers.

6. **Placeholder for Random Number Generation:** The comment `/* Your code goes here */` is a placeholder where the logic for generating and outputting three random integers within the specified range should be added. 

In this section, you can use a loop or direct calls to generate and print the random numbers using functions such as `rand()` and arithmetic operations to ensure the numbers fall within the specified range.
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Transcribed Image Text:### Generating Random Integers within a Specified Range Given integer variables `seedVal`, `smallestValue`, and `largestValue`, output three random integers in the range of `smallestValue` to `largestValue` inclusive. Each output should end with a newline. **Example:** If `smallestValue` is 1 and `largestValue` is 94, then one possible output is: ``` 82 75 72 ``` Below is the C++ code snippet to achieve this task: ```cpp #include <iostream> #include <cstdlib> using namespace std; int main() { int seedVal; int smallestValue; int largestValue; cin >> seedVal; cin >> smallestValue; cin >> largestValue; srand(seedVal); /* Your code goes here */ return 0; } ``` ### Explanation: 1. **Include Libraries:** The program includes the `iostream` and `cstdlib` libraries. `iostream` is used for input and output operations, while `cstdlib` provides functions for random number generation. 2. **Namespace Standard:** `using namespace std;` allows the program to use standard library components, such as `cin` and `cout`, without needing to prefix them with `std::`. 3. **Variable Declaration:** Three integer variables are declared: - `seedVal`: Used to seed the random number generator. - `smallestValue`: The lower bound of the random number range. - `largestValue`: The upper bound of the random number range. 4. **Input Operations:** The program reads the values for `seedVal`, `smallestValue`, and `largestValue` from standard input. 5. **Seed the Random Number Generator:** `srand(seedVal);` seeds the random number generator with the specified seed value to ensure reproducibility of the random numbers. 6. **Placeholder for Random Number Generation:** The comment `/* Your code goes here */` is a placeholder where the logic for generating and outputting three random integers within the specified range should be added. In this section, you can use a loop or direct calls to generate and print the random numbers using functions such as `rand()` and arithmetic operations to ensure the numbers fall within the specified range.
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