c語言輸入一個天數？

#include<stdio.h>

int main()

{

int i,n=0,year=0,month=0,day=0;

printf("請輸入天數<輸入-1退出測試>:");

scanf("%d",&n);

while(n!=-1)

{

while(n>=360)

{

n-=360;

year++;

}

while(n>=30)

{

n-=30;

month++;

}

while(n>0)

{

n--;

day++;

}

printf("%d年%d月%d日\n",year,month,day);

year=month=day=0;

printf("請輸入天數<輸入-1退出測試>:");

scanf("%d",&n);

}

return 0;

}