C++在字符串中查找具有位置特定信息的非重叠子字符串

#include <iostream>
#include <string>
#include <regex>

void findSubstrings(const std::string& str, const std::string& pattern) {
    std::regex regex(pattern);
    std::smatch match;

    size_t startPos = 0;
    while (std::regex_search(str.substr(startPos), match, regex)) {
        size_t foundPos = match.position() + startPos;
        std::cout << "Found substring: " << match.str() << " at position: " << foundPos << std::endl;
        startPos = foundPos + match.length();
    }
}

int main() {
    std::string str = "This is a test string. It contains multiple test substrings.";
    std::string pattern = "test";

    findSubstrings(str, pattern);

    return 0;
}