c++如何给一级指针赋值

Question

假如char p = new char[12];
p地址为 0x12345
charp1 不用 p1=p;的方式，还能怎么赋值使p1和p指向同一地址？
p1 = 0x12345报错。

Answer 1

char *p1=&p[0];

unsigned long long pp = (unsigned long long)p;
char *p1=(char *)pp;