//function for factorial
long int multiplyNumbers(int n)
{
if (n >= 1)
return n*multiplyNumbers(n-1);
else
return 1;
}
int main()
{
int n;
printf("Enter a positive integer: ");
scanf("%d", &n);
printf("Factorial of %d = %ld", n, multiplyNumbers(n));
return 0;
}
int multiplyNumbers(int m, int n) {
if(n==1){
return m;
}
int smallAns =multiplyNumbers(m, n-1);
return m +smallAns;
}
int main () {
printf("I will multiply two numbers for you. \n");
firstNumber();
secondNumber();
multiplyNumbers();
return 0;
}
bignum multiplyNumbers(const bignum &bn1, const bignum &bn2)
{
if (bn1.getBase() != bn2.getBase())
return multiplyNumbers(bn1, bn2.getConverted(bn1.getBase()));
bignum temp(0);
temp.setBase(bn1.getBase());
if (bn1.isZero() || bn2.isZero())
return temp;
//multiply bn1 by each digit of bn2 independently, then add the values together
int counter = bn2.getDigitRange();
for (int i = 0; i < counter; i++)
{
int toMultiply = (ONES_PLACE - bn2.getDecimalCount()) + i;
//verify function isn't checking beyond bounds of the stored array
if (toMultiply >= 0)
{
if (toMultiply >= MAXDIGITS)
throw error_handler(__FILE__, __LINE__, "The value being calculated is too large for the settings provided");
bignum toAdd = multiplyNumbersSimple(bn1.absolute(), bn2.getDigit(toMultiply));
toAdd.leftShift(i);
temp += toAdd;
}
}
if (bn1.isNegative() != bn2.isNegative())
temp.setNegative();
//adjust for added decimal places during multiplication
temp.rightShift(bn2.getDecimalCount());
temp.updateDigits();
return temp;
}
