Two questions

[dashing_76]

Could anyone please help answering these questions. Thanks in advance.

1. Write a statement declairing a pointer to a float and setting that pointer to the address of the variable myNum.



2. If you add 1 to a pointer variable, how does the pointer variable chages? Please explain your answer.

[Unregistered]

1)
float myNum = 8, *pNum;

pNum = &myNum;


2) incrementing a pointer is the same as indexing an array.

--Seb

[Unregistered]

2) Same as incrementing an array index, that is...

--S

[dashing_76]

Originally posted by Unregistered
1)
float myNum = 8, *pNum;

pNum = &myNum;


2) incrementing a pointer is the same as indexing an array.

--Seb

Thank you Mr. unregistered

[MisterBadger]

Q1.
[code]
float myNum=25.52, *n_ptr;
n_ptr=&myNum;
printf("%f",*n_ptr); /*Value at address pointed at by n_ptr will be displayed on screen as 25.52*/
[\code]

Q2. Adding 1 to a pointer variable moves the pointer by the number of bytes of the "base type" which is 4 bytes for a float.
In an array of float values, incrementing the pointer by one with:

n_ptr++;

will allow access to the float value at that memory location using indirection:

printf("%f",*n_ptr);

I see I'm not the first to reply! Pointers can be tricky to start with and they are at the heart of "useful" C programming...

Cheers from MisterBadger.

[MisterBadger]

Yes, I got the code tags wrong... Sorry!

MrB

[dashing_76]

Thanks everyone, with your help I was able to solve my problem. thank you