about testing a program

Hi,

I was working on a program convert 16-HEXA-character key to be 8-ASCII-character key. apparently I am having problem for testing it because it producces strange symbols it also uses an auxilary program that converts Hex value into decimal.

Can anyone see if the way I am testing the program is correct ?

Code:

code


int main()
{
   int i;
   ByteType y;
   ByteType X [16] = "FFFFFFFFFFFFFFFF";
   for( i = 0 ; i < 16; i++)
   {
       y = ASCIZ( &X[i]) ; 
       printf("the corresponding characters are %c\n", y);  
    }

}     

ByteType ASCIZ(ByteType *Addr)
{
	int i, v1, v2;
	ByteType a1, a2, v;


	/* Convert 16-HEXA-character key to be 8-ASCII-character key. */
	for (i = 0; i < 8; i++)
	{
		a1 = *Addr++;
		if (i == 7)
			a2 = *Addr;
                                else
			a2 = *Addr++;
                     /* Convert two HEXA characters into their decimal value. */
		v1 = Convert(a1);
		v2 = Convert(a2);

		/* Convert the two decimal value to be one ASCII character. */
		v = ((v1 * 16) + v2);
	}
	
	  return   v;
}



/* there is function that converts Hex to decimal */
int Convert(ByteType val )
{
   if ((val >= 0  ) && (val <= '9' ))
        
      return val;           
   
   else ...
 
}

For easy conversion to-and-from b/w number systems...use

char* itoa(int value, char *string, int radix);

where radix = number system (e.g. 16 for hex,8 for octadeci, 10 for ...)

for further info. see your nearest online help...