//天數轉換為周數和天數，利用while循環重復輸入#include <stdio.h>int main (void){?? ?int week,day,day2;?? ?printf ("請輸入天數：");?? ?scanf ("%d",&day);?? ?while (day>0)?? ?{?? ??? ?week = day/7;?? ??? ?day2 = day&7;?? ??? ?printf ("%d days 等于 %d周%d? days\n",day,week,day2);?? ??? ?printf ("請輸入下一個值：");?? ??? ?scanf ("%d",day);?? ?}?? ?printf ("done");?? ?system ("pause");?? ?return 0;}