关于const的用法的不解？

converse

没有你所说的深拷贝的意思,两者不是一个概念了,new的话空间在堆里面因为是动态分配的,可是字符串常量就不是这样的了,我想这个对于任何编译器都是一样的.

lenovo

A string constant, written as
   "I am a string"

is an array of characters. In the internal representation, the array is terminated with the null character '\0' so that programs can find the end. The length in storage is thus one more than the number of characters between the double quotes.
Perhaps the most common occurrence of string constants is as arguments to functions, as in

   printf("hello, world\n");

When a character string like this appears in a program, access to it is through a character pointer; printf receives a pointer to the beginning of the character array. That is, a string constant is accessed by a pointer to its first element.
String constants need not be function arguments. If pmessage is declared as

   char *pmessage;

then the statement
   pmessage = "now is the time";

assigns to pmessage a pointer to the character array. This is not a string copy; only pointers are involved. C does not provide any operators for processing an entire string of characters as a unit.
There is an important difference between these definitions:

   char amessage[] = "now is the time"; /* an array */
   char *pmessage = "now is the time"; /* a pointer */

amessage is an array, just big enough to hold the sequence of characters and '\0' that initializes it. Individual characters within the array may be changed but amessage will always refer to the same storage. On the other hand, pmessage is a pointer, initialized to point to a string constant; the pointer may subsequently be modified to point elsewhere, but the result is undefined if you try to modify the string contents.

摘自《TCPL》，好好看看吧。