[Dev-C++] Question about pointers (beginner)

[Christian S. <sm...@xs...>]

From my book:

Given x = 123 and ptr_int = &x after that *ptr_int = 456 has been executed.
What is the value of x?

I thought it was 123 as the pointer *ptr_int is a null pointer and can't
have any value.

This is how I see it:

main ( )
{
int x, *ptr_int;

*ptr_int = 456; /*This pointer is a null pointer at this moment right? */

x =123;
ptr_int = &x; /* As x is just set to 123 and the statement *ptr_int = 456;
was executed before I would think *ptr_int would be 123 */

}

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But the books says the value of *ptr_int at the end is 456. How come??

Thanks for your time,

Christian