About string arrays and string constants in C + +

Today encountered a lot of problems, from memory to string ... On the Internet to check some information, now on the string array and string constants to make a summary of it.
In fact, char sz[] = "string";  and char *psz = "string"; The difference between the assignment of these two strings.

First of all say char sz[] = "string"; This statement, which is stored in the form of an array, is interpreted by the compiler as
Char sz[] = {' s ', ' t ', ' r ', ' I ', ' n ', ' g ', '/0 '}; If it appears inside the function, these characters will be stored on the stack, so it is not a string constant.

Again, char *psz = "string"; This statement, which defines a pointer to a "string" string and has no space for a "string" string, and it is obvious that "string" as a string constant and stored in a constant area is the most appropriate choice. And the statement psz[4] = ' x '; An error is not generated at compile time, and an exception occurs when execution occurs because "string" is stored in a read-only storage area and cannot be modified. This is the same as the const char *PSZ = "string" in C + +, so it is best to display the Const keyword so that the compiler detects a "modify constant" error.

A problem that has not been understood before: what to think when a row parameter of a function is an array.
such as: void Foo (char sz[100], int ival[10]);
The answer is to interpret it as the form of a pointer:
void Foo (char *sz, int *ival);