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To work with streaming data in C++, you can use file streams to read data from a file as it is being written. Here's an example of how to read streaming data from a file:

1#include <iostream>
2#include <fstream>
3
4int main() {
5    std::ifstream inputFile("streaming_data.txt");
6    std::string line;
7
8    if (inputFile.is_open()) {
9        while (getline(inputFile, line)) {
10            // Process the streaming data
11            std::cout << line << std::endl;
12        }
13
14        inputFile.close();
15    }
16
17    return 0;
18}

In this example, we first open the file streaming_data.txt using the std::ifstream class. We then use a while loop to read each line of the file using the getline function. Inside the loop, you can process the streaming data however you need. In this case, we simply print each line to the console using std::cout.

Remember to close the file after you're done reading the streaming data by calling the close function on the input file stream.

With this basic example, you can start working with streaming data in C++ and process it for algorithmic trading.