登台阶.c

C语言小程序。有白鸡问题

#include "stdio.h"
main()
{ int x,y,i;
  x=1;
  y=2;
  i=1;
s1:
  {
    x=x+y;
    y=y+x;
    i++;
  }
  if(i<=9)
    goto s1; 
  printf("y=%d\n",y);
}