求问 为啥运行失败啊？
#include <stdio.h>
int main ()
{
int x,i;
x=1;
for(i=9;i<=1;i--)
{
x=x*2+2;
switch(i)
{
case 9:printf ("第%d天所剩桃子%d个\n"，i,x);
break;
case 8:printf ("第%d天所剩桃子%d个\n"，i,x);
break;
case 7:printf ("第%d天所剩桃子%d个\n"，i,x);
break;
case 6:printf ("第%d天所剩桃子%d个\n"，i,x);
break;
case 5:printf ("第%d天所剩桃子%d个\n"，i,x);
break;
case 4:printf ("第%d天所剩桃子%d个\n"，i,x);
break;
case 3:printf ("第%d天所剩桃子%d个\n"，i,x);
break;
case 2:printf ("第%d天所剩桃子%d个\n"，i,x);
break;
case 1:printf ("第%d天所剩桃子%d个\n"，i,x);
break;
}
}
}
