# include <stdio.h>

int main()
{
    int stepNo,x,y,fx,fy,stepx,stepy;
   printf("please enter your initial location x and y:");
   scanf(" %d%d",&x,&y);
   printf("Please enter your final location stepfx and stepfy:");
   scanf(" %d%d",&fx,&fy);


   while(x<=fx&&y<=fy)
   {
       if(stepNo%3==0)
       stepx+1,stepy+1;
     printf("x=%d  y=%d\n",x,y);

        x=x+1;
        y=y+1;

   }

getch();
return 0;
}
题目的意思是说在输出之后显示每三步变化一次步长

The similar step only can be used for 3 consecutive movements. After that the movement of the robot must used other steps. The movement of the Keep all new coordinates for a step from origin to destination.  这个是题目

哦，明白一些了，谢谢楼上了！