(https://www.cnblogs.com/songchaohuang/articles/5591576.html)
const char*是指向常量的指针,而不是指针本身为常量,可以不被初始化.该指针可以指向常量也可以指向变量,只是从该指针的角度而言,它所指向的是常量，
Data can not be modified by the pointer pointing to it.
1.const char is not assigned directly to a char , so the compiler can not pass, reason: if you can, then by char can modify the contents of const char points, which is not allowed so char. To open up new addition space.
include <iostream>
STD namespace the using;
void main () {
const char * CPC = "ABCDE";
char * PC = new new char [100];
strcpy (PC, CPC);
COUT PC << << endl;
}
2.char to const char direct assignment on it
const char* cpc;
char* pc="abcde";
cpc=pc;
Second, the pointer constant, constant pointer
1. What is a pointer constant? I.e. Pointer Pointer constant type constant.
例：char *const name1="John";
name1="abc"; //错误，name1指针，不能变，一个指针类型的变量，存放的是地址，所以不能把'"abc"的地址赋给name1
char * name2= name1; //可以
2. What is a constant pointer? Which means constant pointer, the pointer value of the pointer may change to a constant content of the address pointer in a constant can not be changed,
例：const char *name1="John";
char s[]="abc"; name1=s; //正确，name1存放的地址可以改变
char * name2= name1; //不可以，因为name2 和 name1存放的是同一块地址，如果name2地址中的内容改了，则name1的内容也改了，那么name1就不再是指向常量的指针了。
Transfer: http://www.cnblogs.com/yc_sunniwell/archive/2010/07/13/1776613.html
Reproduced in: https: //www.jianshu.com/p/7736df723e84