sludgy character array problem

[John Aldrich]

I'm having problems with an array tacking a bunch of sludge on to the end of a array of random characters. It needs to generate an array of 64 random bytes for use inan encryption routine. I'm getting the 64 bytes of information that I want at the front end of the array, BUT..it's also tacking on the contents of the original array that I filled with a sequence from ASCII 32 to ASCII 127 character values. My question is how to get the sludge off the end of the array so it consists of just teh 64 random byte values. Source Code Follows:

// seed a random number generator with the current
// tick count. we will use this as an iterator in
// the szRandomBytes array a bit later

srand(GetTickCount());

// set some values so that we only get legal characters
// from the szStringArray which will be used to fill
// the szRandomBytes array with legal characters

int nElementCount = 0;
int nElementValue = 32;

// set up our two arrays. szStringArray gets filled
// with legal character values. szRandomBytes uses
// the values in szStringArray to generate a random
// character string that we can use for encryption

char szStringArray[95] = "";
char szRandomBytes[64] = "";

// filling the array

while ( nElementCount <= 94 )
{
szStringArray[nElementCount] = nElementValue;
nElementCount++;
nElementValue++;
}

// set iterator to zero

nElementCount = 0;

// pull 64 random characters out of the array
// to create our random string for encoding

while (nElementCount <=63)
{

// get a random number


int nRandomNumber = rand();


// checking it out.  if its greater than 95
// we divide it until its with the bounds of
// the szStringArray.


while (nRandomNumber >= 95)
{
	nRandomNumber = nRandomNumber / 2;
}


// using nRandomNumber and szStringArray to assign
// a value to the Element Number that szRandomBytes
// is currently on up to a possible 64 characters


szRandomBytes\[nElementCount\] = szStringArray\[nRandomNumber\];


// incrementing the element count so
// that the next value gets filled.


nElementCount++;

}

// debug check

MessageBox(NULL, szRandomBytes, "Random String From Array", MB_OK);

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[Ranjan Banerji]

Put a terminating character at teh end of your string. The last character in your array should be '\0'. You are trying to display a string in your MessageBox by putting the array of char but are not giving your array of char a termination indicating this is where the string ends.

[jmkhael]

char szStringArray[95] = ""; char szRandomBytes[64] = ""; memset(szStringArray,0,95); memset(szRandomBytes,0,64); And off u go Papa Murex Co. while (TRUE) Papa.WillLove ( Bebe ) ;