getDiShi method
Implementation
String getDiShi(int zhiIndex) {
int? offset = CHANG_SHENG_OFFSET[getDayGan()];
int index = offset! + (getDayGanIndex() % 2 == 0 ? zhiIndex : -zhiIndex);
if (index >= 12) {
index -= 12;
}
if (index < 0) {
index += 12;
}
return CHANG_SHENG[index];
}