STL vector 逗号分割保存到字符串中

#include <iostream>
#include <vector>
#include <string>

int main() {
    std::vector<std::string> numbers = {"111", "abc", "123"};

    std::string result;
    for (const auto& num : numbers) {
        if (!result.empty()) {
            result += ",";
        }
        result += num;
    }
    std::cout << result << std::endl;
    return 0;
}