I need to Multiply my HugeInteger by 10... And I\'m really stuck on how I should

Question

I need to Multiply my HugeInteger by 10... And I'm really stuck on how I should do it. I think I need to shift all numbers over by one but I just cant seem to get it working...

Here's what I have so far (With certain unrelated parts removed):
class HugeInteger {
public:

// CONSTRUCTORS
HugeInteger( long = 0 );
HugeInteger( const char * );

//.....

HugeInteger x10(); //multiply a HugeInteger by 10

//....

// OUTPUT and MISC functions
void print();

char* getDigits();

private:
// indexes are 0 thru 40, 39 chars and an overflow digit
char digits[41];
};


HugeInteger::HugeInteger(long L)
{
for(int i = 0; i < 41; i++)
{
int digit = L % 10;
digits[i] = digit + '0';
L = L / 10;
}
}


HugeInteger::HugeInteger(const char * digitsIn)
{
//must prefill w/0's
for(int i = 0; i < 41; i++)
{
digits[i] = '0';
}

//rea; fill/copy digits
for(int i = 0, j = strlen(digitsIn) - 1; j >= 0; i++, j--)
{
digits[i] = digitsIn[j];
}
}

//......


void HugeInteger::print()
{
char temp[41];
temp[40] = 0; //null term
for( int i = 0, j = 39; i < 40; i++, j--)
{
temp[i] = digits[j];
}
cout << temp;
}


char* HugeInteger::getDigits()
{
return digits;
}



void main()
{
HugeInteger A( 45658234568 );
HugeInteger B( "7834" );
HugeInteger C( 12 );

//...

}

Explanation / Answer

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