//mnozenie
CNumber CNumber::cMultiply(CNumber &cMultiplier) {
if (b_positive != cMultiplier.b_positive) {// gdy sa roznych znakow
if (!b_positive) {// this ujemny
b_positive = true;
CNumber c_result (cMultiply(cMultiplier));
c_result.b_positive = false;
b_positive = false;
return c_result;
}//if (!b_positive)
else {// multiplier ujemny
cMultiplier.b_positive = true;
CNumber c_result(cMultiply(cMultiplier));
c_result.b_positive = false;
cMultiplier.b_positive = false;
return c_result;
}//else
}//if (b_positive != cMultiplier.b_positive)
if (i_length < cMultiplier.i_length)
return cMultiplier.cMultiply(*this);
// mnozymy 2 liczby o tych samych znakach, gdzie pierwsza jest wieksza badz rowna drugiej
CNumber c_result (max(i_length, cMultiplier.i_length) * 2); //dlugosc liczby maksymalnie 2 razy wieksza niz najwiekszej z liczb
int k = 0;
for (int i = cMultiplier.i_length - 1; i >= 0; i--) {
if (cMultiplier.pi_number[i] != 0) {
for (int j = i_length - 1; j >= 0; j--)
c_result.v_increment(c_result.i_length - 1 - k - (i_length - 1 - j), cMultiplier.pi_number[i] * pi_number[j]);
}//if (cMultiplier.pi_number[i] != 0)
k++;
}//for (int i = cMultiplier.i_length - 1; i >= 0; i--)
return c_result;
}//CNumber CNumber::cMultiply(CNumber &cMultiplier)
