gistfile1.c

#include<stdio.h>
main()
{
  float a,r1,r2,m; 
  char b,c;

  printf("请输入加油量，汽油类型（a,b,c）以及服务类型（f,m,e）\n");
  printf("***************************************************\n");
  printf("请输入:");

  scanf("%f,%c,%c",&a,&b,&c);

  switch(b)
  {
    case 'a':r1=1.05; break;
    case 'b':r1=1.35; break;
    case 'c':r1=1.18; break;
  }
  switch(c)
  {
    case 'f':r2=1;    break;
    case 'm':r2=0.95; break;
    case 'e':r2=0.9;  break;
  }
  m=a*r1*r2;
  printf("应付款:");
  printf("%.1f\n",m);
  printf("元\n");

}