Arbitrary-precision Decimal Class with Arithmetic Methods

#include 
using namespace std;
#include "BigDecimal.h"
//---------------------------------------------------------------------

#pragma argsused
int main(int argc, char* argv[])
{

BigDecimal testa("1234567812345678123456781.2345678");

cout << testa << endl;

string s("12387654321876543218765432187654322");
BigDecimal testb(s);

cout << testb << endl;

testa = BigDecimal("1234.544");
testb.setString("1123.456");
cout << testa + testb << endl;
cout << testa - testb << endl;
cout << testb - testa << endl;
cout << testa + (-testb) << endl;

cout << testa * testb << endl;

cout << testa / testb << endl;
cout << testb / testa << endl;

cout << BigDecimal(4)/3 << endl;

cout << BigDecimal("54321.1234")%5 << endl;

cout << BigDecimal("-54")%14 << endl;

cout << (testa^8) << endl;
cout << (testa^-4) << endl;

++testa = 5;
cout << testa++ << endl;
cout << ++testa << endl;
--testa = 5;
cout << testa-- << endl;
cout << --testa << endl;

testa = BigDecimal("1234.544");

testa += testb;
cout << testa << endl;

testa -= testb;
cout << testa << endl;

testa *= testb;
cout << testa << endl;

testa /= testb;
cout << testa << endl;

testa %= testb;
cout << testa << endl;

testa ^= 5;
cout << testa << endl;

cout << sqrt(testa) << endl;

getchar();

return 0;
}
//----------------------------------------------------------------------