×
INTELLIGENT WORK FORUMS
FOR COMPUTER PROFESSIONALS

Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Question about casting and pointers

Question about casting and pointers

Question about casting and pointers

(OP)
Hello,

I am just experimenting with some code. And I am not sure why I need to cast to an unsigned char*.

I get this error:  cannot convert from 'unsigned char' to 'unsigned char *'    
I can understand that the pointer is an unsigned char. But if I am assigning the address of the myFloat which I am casting a unsigned char. Why do I need to cast it as a pointer as well?

CODE

float myFloat = 10000;
unsigned char *ptrChar;
ptrChar = (unsigned char *) &myFloat;

//Why can't I just do this?
ptrChar = (unsigned char) &myFloat;

The following example using a int:

CODE

int myInt = 1000;
int *ptrInt = &myInt;
As the pointer is an int and I am assigning the address of myInt this works perfectly ok.

However, with the example above I have converted to a unsigned char.

Many thanks for clearing this up.

Steve

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members! Already a Member? Login

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close