計算分頁頁數或索引在第幾頁

int totalCount = 100;
int totalPageNo = 0;
int pageSize = 10;

//計算共多少頁
totalPageNo = totalCount % pageSize == 0 ? totalCount / pageSize : totalCount / pageSize + 1;

//判斷索引10在第幾頁
int suoyin = 10;
int currPage = suoyin % pageSize == 0 ? suoyin / pageSize : suoyin / pageSize + 1;   //第幾頁