/*!@brief 計算今天是一年的第幾周@param [in] nYear 年@param [in] nMonth 月@param [in] nDate 日@param [in] nWeek 星期幾@return uint16_t*/ uint16_t Cal_YearWeek(int nYear, int nMonth, int nDate, int nWeek) {uint16_t uYearWeek;int nWeekCnt = 0;int nWeekRemain = 0;int nCount = 0;switch(nMonth-1){case 11: nCount += 30;case 10: nCount += 31;case 9: nCount += 30;case 8: nCount += 31;case 7: nCount += 31;case 6: nCount += 30;case 5: nCount += 31;case 4: nCount += 30;case 3: nCount += 31;case 2:if((nYear%4 == 0 && nYear %100 != 0) || nYear%400 == 0){nCount += 29;}else{nCount += 28;}case 1: nCount += 31;default: break;}// 根據當前天數計算屬于一年的第幾周nCount += nDate;nWeekCnt = (nCount + (7 - nWeek))/7;nWeekRemain = (nCount + (7 - nWeek))%7;uYearWeek = nWeekCnt + ((nWeekRemain == 0) ? 0 : 1);return uYearWeek; }

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