程序代码：

#include<stdio.h>
int main()
{
    int c,s;
    float p,w,d,f;
    printf("please enter price,weight,skm:");
    scanf("%f,%f,%d",&p,&w,&s);
    if(s>=3000) c=12;
    else c=s/250;
    switch(c)
    {
      case 0: d=0;break;
      case 1: d=2;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*w*s*(1-d/100.0);
    printf("freight is %10.2ld\n",f);
    return 0;
}

程序代码：

#include <stdio.h>
void main ( )

 {
    int c,s;
    float p,w,d,f;
    printf("please enter price,weight,distance:");
    scanf("%f,%f,%d",&p,&w,&s);
    if(s>=3000) c=12;
    else c=s/250;
    switch(c)
    {
      case 0:d=0;break;
      case 1:d=2;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*w*s*(1-d/100.0);
    printf("freight=%10.2f\n",f);
}