请各位大侠看看，下面第五行多了个换行的字符程序就不能正确执行，为什么？谢谢！
#include<stdio.h>
void main()
{int s,c;
float f,p,w,d;
scanf("%f,%f,%d\n",&p,&w,&s);
if(s>=3000) c=12;
else c=s/250;
switch(c)
{case 0:d=0;break;
case 1:d=1;break;
case 2:
case 3:d=5;break;
case 4:
case 5:
case 6:
case 7:d=8;break;
case 8:
case 9:
case 10:
case 11:d=10;break;
case 12:d=15;break;
}
f=p*s*w*(1-d/100.0);
printf("freight=%15.4f\n",f);