C语言程序设计源代码：C073指针值的变化

#include<stdio.h>
void main()
{
int i=0,*pi=&i;
float f=0,*pf=&f;
long l=0,*pl=&l;
printf("pi=%lu,pi+1=%lu\n",pi,pi+1);
printf("pi=%lu,pi-1=%lu\n",pi,pi-1);
printf("pf=%lu,",pf);
printf("pf++=%lu\n",pf);
printf("pl=%lu,",pl);
pl--;
printf("pl++=%lu\n",pl);
}