#include "stdio.h"
main()
{
   int i,d1,d2,d3,d4,d5,d6;
   printf("please input i:");
   scanf("%d",&i);
   switch(i/100000)
   {
       case 1:d1=i*0.1;printf("%d",d1);break;
       case 2:d2=d1+(i-100000)*0.075;printf("%d",d2);break;
    case 3:
       case 4:d3=d2+(i-200000)*0.05;printf("%d",d3);break;
       case 5:
       case 6:d4=d3+(i-400000)*0.03;printf("%d",d4);break;
       case 7:
       case 8:
       case 9:
       case 10:d5=d4+(i-600000)*0.015;printf("%d",d5);break;
       default:d6=d5+(i-1000000)*0.01;
       printf("%d",d6);
   }
}

你到底是想用int呢 还是想用double/float呢