c++ text between substrings

To extract the text between substrings in C++, you can follow these steps:

1. Declare a string variable to hold the input text.
2. Declare two string variables to hold the starting and ending substrings.
3. Use the find() function to locate the starting substring in the input text. The find() function returns the position of the substring within the string.
4. Use the substr() function to extract the text between the starting and ending substrings. The substr() function takes two arguments: the starting position and the length of the substring to be extracted.
5. Print or store the extracted text for further use.

Here's an example code snippet that demonstrates these steps:

#include <iostream>
#include <string>

int main() {
    std::string inputText = "This is the text between the substrings.";
    std::string startSubstring = "text ";
    std::string endSubstring = " substrings";

    size_t startPos = inputText.find(startSubstring);
    size_t endPos = inputText.find(endSubstring);

    if (startPos != std::string::npos && endPos != std::string::npos) {
        startPos += startSubstring.length();
        std::string extractedText = inputText.substr(startPos, endPos - startPos);
        std::cout << "Extracted text: " << extractedText << std::endl;
    } else {
        std::cout << "Substrings not found." << std::endl;
    }

    return 0;
}

In this example, the input text is "This is the text between the substrings." The starting substring is "text " and the ending substring is " substrings". The code finds the positions of these substrings using the find() function and then uses the substr() function to extract the text between them. The extracted text is then printed as the output.

I hope this explanation helps! Let me know if you have any further questions.