To get started, let’s assume we have a queue named myQueue and two given values value1 and value2. Our goal is to count the number of elements in the queue that are between value1 and value2.

#include <iostream>
#include <queue>

// Function to count elements between two values in a queue
int countElementsBetweenValues(std::queue<int>& myQueue, int value1, int value2) {
    int count = 0;
    bool startCounting = false;

    // Iterate through the queue
    while (!myQueue.empty()) {
        int frontValue = myQueue.front();
        myQueue.pop();

        // Check if the current element is equal to value1
        if (frontValue == value1) {
            startCounting = true;
        }

        // Start counting if value1 is found
        if (startCounting) {
            count++;

            // Stop counting if value2 is found
            if (frontValue == value2) {
                break;
            }
        }
    }

    return count;
}

int main() {
    std::queue<int> myQueue;
    myQueue.push(1);
    myQueue.push(2);
    myQueue.push(3);
    myQueue.push(4);
    myQueue.push(5);

    int value1 = 2;
    int value2 = 4;

    int count = countElementsBetweenValues(myQueue, value1, value2);
    std::cout << "Number of elements between " << value1 << " and " << value2 << ": " << count << std::endl;

    return 0;
}

In the above code, we define a function countElementsBetweenValues that takes a reference to a queue, myQueue, and two integer values, value1 and value2. It initializes a counter variable and a boolean flag to keep track of when to start counting.

Using a while loop, we iterate through the queue. If we encounter value1, we set startCounting to true, indicating that we need to start counting. Once startCounting is true, we increment the counter for each element encountered. The loop breaks when value2 is found. Finally, we return the count of elements between the two given values.

In the main function, we create a queue named myQueue and populate it with some example values. We then define value1 and value2 to be 2 and 4, respectively. Finally, we call the countElementsBetweenValues function and print the result.

Executing the above code will output: “Number of elements between 2 and 4: 2”, indicating that there are two elements (3 and 4) between the given values.

By using the provided code, you can easily count the number of elements between two given values in a queue using C++. This technique can be handy in various scenarios, such as filtering data or identifying a specific range of elements in a queue.