int main() { int a = 7, b = 8, *p, *q, *r; p = &a; q = &b; r = p; p = q; q = r; printf("%d,%d,%d,%d\n", *p, *q, a, b); }
8,7,8,7
7,8,7,8
8,7,7,8
7,8,8,7
int main() { int a=7,b=8,*p,*q,*r; p=&a;q=&b;//这时*p=7,*q=8,p指向a,q指向b r=p;//这时*p=7,*q=8,*r=7,r指向a p=q;//这时p指针被修改,指向了b,因为q是指向b的;*p=8,*q=8,*r=7 q=r;//这时q指针被修改,指向了a,因为r是指向a的;*p=8,*q=7,*r=7 printf("%d,%d,%d,%d\n",*p,*q,a,b);//打印8,7,7,8 return 0; }
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