如何在C++中使用起始分隔符和结束分隔符提取子字符串

#include <iostream>
#include <string>

std::string extractSubstring(const std::string& input, const std::string& startDelimiter, const std::string& endDelimiter) {
    size_t startPos = input.find(startDelimiter);
    if (startPos == std::string::npos) {
        return ""; // 起始分隔符未找到
    }
    startPos += startDelimiter.length(); // 移动到起始分隔符之后

    size_t endPos = input.find(endDelimiter, startPos);
    if (endPos == std::string::npos) {
        return ""; // 结束分隔符未找到
    }

    return input.substr(startPos, endPos - startPos); // 提取子字符串
}

int main() {
    std::string input = "This is a <sample> text with <start> and </end> delimiters.";
    std::string startDelimiter = "<start>";
    std::string endDelimiter = "</end>";

    std::string result = extractSubstring(input, startDelimiter, endDelimiter);
    std::cout << "Extracted substring: " << result << std::endl;

    return 0;
}