Very larger integer calulator

[Dewayne]

I have to write a C++ program to add,multiply, and divide very large integer numbers of unlimited size. The book suggest breaking the number up like this 9876543210987654 =
987 765 432 109 876 54 ..... and handling it like that I am totally lost on how to do this please help !

[Codulation]

Search Google for big int class and you will get lots of pre-written classes that overload the operators. You can look at these to see where to start. Basically you can store a num of any length in a string and write functions to do the math on them, all wrapped inside a class with the usual overloaded ops.
-d-

[Sebastiani]

most mathematical operations of a computer involve addition on some level - subtraction becomes the addition of numbers in two's complement, multiplication repetitive addition, and division repetitive subtraction. here's a small set of classes that add binary bits just like a computer:

namespace adder {
 struct result {
  result & set(bool _sum, bool _carry) {
   sum = _sum, carry = _carry;
   return *this;
   }
  void clear(void) {
   set(0, 0);
   }
  result(bool _sum = 0, bool _carry = 0) {
   set(_sum, _carry);
   }
  bool sum, carry;
 };
 struct halfadder : result {
  result & add(bool a, bool b) {
   sum = xor_gate(a, b);
   carry = and_gate(a, b);
   return *this;
   }
  halfadder(bool a = 0, bool b = 0) {
   add(a, b);
   }
 };
 struct fulladder : halfadder {
  result & add(bool a, bool b, bool carry_in) {
   halfadder first(a, b);
   halfadder::add(carry_in, first.sum);
   carry = or_gate(carry, first.carry);
   return *this;
   }
  fulladder(bool a = 0, bool b = 0, bool carry_in = 0) {
   add(a, b, carry_in);
   }
 };
} // namespace adder

good luck!