学步园

//tEnd到tBegin的时间差 0 代表在同一个时间单位内、例如同一天、周、月

static inline int getDaysSub(
        time_t tBegin, time_t tItem)
{
    return (tItem-tBegin)/86400;
}

static inline int getWeeksSub(
        time_t tBegin, time_t tItem)
{
    return (tItem/86400+WDAY_1970_0)/7-(tBegin/86400+WDAY_1970_0)/7;
}

static inline int getMonthsSub(
        time_t tBegin, time_t tItem)
{
    struct tm *pItem, *pBegin;
    int months=0;
    pItem=localtime(&tItem);
    months = pItem->tm_year*12+pItem->tm_mon;
    pBegin=localtime(&tBegin);
    months = months -pBegin->tm_year*12-pBegin->tm_mon;
    return months;
}