pointers safety issue [solved]

[Clodi]

hello guys,
how you doin?

Code: Select all

void putString( const char* pStart, const char*pEnd )
{
	for ( ; pStart < pEnd; pStart ++ )
	{
		putchar( *pStart );
	}
}

any idea why this function actually works fine???
According to me it shouldn't work as I declare char* pStart as constant and then I change it permanently throughout the function..

[Musi]

Ah that's because "const char* pStart" makes it so you cant change the value that the pointer points to. If you want to make it so the actual pointer can't change what it points to then you should put const after the asterisk.

Code: Select all

const char* pStart           // The object that the pointer points to cannot be changed.
char* const pStart           // The pointer cannot change what it points to.
const char* const pStart     // Both the object and the pointer cannot be changed.

[Clodi]

ohhh. thank you so much. I didn't know that.

So, in case I wanted to lock a pointer completely?

Code: Select all

( const char* const pStart, ...

?

[Musi]

Yep exactly. ( edited my last post )

[Clodi]

A big thank you.