程序代码：

#include <stdio.h>
#include <stdlib.h>
int main()
{
   int number1,number2,t,i,times=0;
   printf("请输入两个整数：\n");
   scanf("%d,%d",&number1,&number2);
   if(number1<number2)
   {
       t=number1;
       number1=number2;
       number2=t;
   }
   for(i=number2;i>=number1;i++)
   {
       if(i/3==0)
       {
           times++;
       }
   }
   printf("两个整数之间总共有%d个数能被3整除",times);
    return 0;
}