#include<stdio.h>
 #define SIZE 4
 int main(void){
     
     short dates[SIZE];
     
     double index;
     short *pti;
     double bills[SIZE];
     double *ptf;

     pti=dates;
     ptf=bills;
     printf("%23s %10s","short","double");
     for(index=0;index<SIZE;index++)
         printf("pointer + %d: %10P %10p\n",index,pti+index, ptf+index);
     return 0;
 }

指针：double *ptf;short *pti;
编译出错error C2111: pointer addition requires integral operand

int index;  指针的步长不能是小数

你的数组是空的吧