如何将difftime转换为字符串"X小时Y分钟Z秒“

#include <iostream>
#include <string>
#include <sstream>

std::string convertDifftimeToString(double difftime) {
    int totalSeconds = static_cast<int>(difftime);

    int hours = totalSeconds / 3600;
    int minutes = (totalSeconds % 3600) / 60;
    int seconds = (totalSeconds % 3600) % 60;

    std::ostringstream oss;
    oss << hours << "小时" << minutes << "分钟" << seconds << "秒";

    return oss.str();
}

int main() {
    double difftime = 3666.0; // 1小时1分钟6秒
    std::string result = convertDifftimeToString(difftime);
    std::cout << result << std::endl;

    return 0;
}