prefix to an integer

[vsachar]

I have an address of a dynamic memory which is 00355618 which is in a file. I want to read that address from there and then call delete to delete the corresponding memory address.
Please help

[weaknessforcats]

Well, assuming 00355618 is a valid address in your current program, which I doubt, you read the digits into a string, convert the string to an unsigned int and then typecast the unsigned int to the same type that was used with the original allocation.

However, I expect:
1) the 00355618 was written to the file and the program completed. Next time th program runs 00355618 is invalid.
2) the file contains 00355618 bit apparently not the type used to allocate it. That makes typecasting to the correct type iffy.


What you should be doing is reading the disc file into memory and allocaiting as you go. Then then the program is ready to complete, your write out from memory to the file the current data.

I have never seen an address in a file like this. File offsets, yes, but actual addresses no.

[donbock]

@vsachar
Generally, the term 'dynamic memory' indicates 'heap memory', that is, memory that is dynamically allocated while your program runs via either 'new', 'malloc', or 'calloc'. There is every reason to expect the address of such dynamic memory to be different every time your program executes. If that's the kind of memory you're trying to access then the worst thing you could do is hard-code the physical address.

By the way, the default interpretation of literal "00355618" is as an octal number (because of the leading zero). Is that what you want? You can certainly choose to interpret it as a decimal or hexadecimal number; but only if you know that's what you want.

On the face of it, your question leaves me with the impression that you are trying to do something ill-advised or even dangerous. Please provide more context for what is going on.

• How did you find out that the address is 00355618?
• What is this the address of (ie, char, int, float, structure, array, etc.).
• If it is dynamic memory, then who allocated it?
• If some other program or task allocated it, then are you sure you should delete it?

[donbock]

Argh ... this is a double-post! My reply of a few minutes ago was a waste of time. Refer to string to pointer for the more up-to-date discussion.

[JosAH]

@donbock
My bad, I didn't see it. Maybe those two threads should be merged or I should close one of them.

kind regards,

Jos