Re: Access violation error

David Wilkinson <>
Fri, 06 Jul 2007 08:02:37 -0500
karim wrote:

Hi All,
i have the following code in my cpp file
int i = 0;

char *passwordToEncrypt = "080000151F6ECF67";
char *encpwd8 = NULL;
char *encpwd16 = NULL;

//if i uncomment below line,then it throwing access violation error during
//i = 0605;

int l = E3Des(passwordToEncrypt, encpwd8, encpwd16, &i);


the method "E3Des" is defined in a dll and it is linked. so no compilation
errors:-). i have only runtime error.

can anybody help me out.


What is the declaration of E3Des()? Does it modify the first parameter?
It would seem that it does. In that case you must pass it a modifiable
character string

char passwordToEncrypt[1024] = "080000151F6ECF67";

(assuming that 1024 is long enough).

Additional point: when you assign a string literal to a char pointer you
should always write

const char *passwordToEncrypt = "080000151F6ECF67";

Then the compiler will stop you from passing it to a function that will
modify the string (i.e. one that takes char* as argument).

David Wilkinson
Visual C++ MVP

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