code analysis

[Member_15070286]

Hi, #include int main() { char str[20] = "Hello"; char *const p=str; *p='M'; printf("%s\n", str); return 0; } output: Mello As per my knowledge when we use const then we can't change a char in t then how output is Mello instead of Hello.

[Lost User]

You need to read the declaration right to left:

char *const p=str;
| | | |
| | | +- the variable p
| | +----- is a constant
| +---------pointer
+------------to a character

So const here applies to the pointer p and not to the data that it is pointing to. That would be:

const char* p=str; // p is a pointer to a character constant.

[Greg Utas]

const applies to what's on its immediate left: a pointer (*) or a type (char and many others, even ones that you've defined). If there's nothing on its left--that is, when it appears first--const applies to what's on its immediate right.

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[Member_15070286]

Hi Richard, Thank you for your reply. I understood the concept clearly. Best Regards Niharika

[Member_15070286]

Hi Greg, Thank you for your immediate response. I understood the point clearly. Regarda, Niharika