秒数转换为天小时分钟秒的格式

//num 为需要转换的秒数
    //天数计算
    int days = (num)/(24*3600);

    //小时计算
    int hours = (num)%(24*3600)/3600;

    //分钟计算
    int minutes = (num)%3600/60;

    //秒计算
    int second = (num)%60；