my::LongInt my::operator -(my::LongInt const &_a, my::LongInt const &_b)
{
if (_a.sign == _b.sign){
LongInt result;
LongInt a, b;
unsigned int digit = Pow(2, CHAR_BIT);
unsigned int help;
if (_a < _b){ //получаем знак разности и после работаем с числами a и b, причем 0 <= b <= a
result.sign = false;
if (abs(_a) < abs(_b)){
a = abs(_b);
b = abs(_a);
}
else{
b = abs(_b);
a = abs(_a);
}
}
else{
result.sign = true;
if (abs(_a) < abs(_b)){
a = abs(_b);
b = abs(_a);
}
else{
b = abs(_b);
a = abs(_a);
}
}
result.number = a.number;
for(unsigned int i = 0; i < b.number.GetSize(); i++){
if (a.number[i] >= b.number[i])
result.number[i] -= b.number[i];
else{
help = a.number[i] + digit - b.number[i];
result.number[i] = (char) help;
int j = i + 1;
for (; a.number[j] == 0; j++){
a.number[j] = digit - 1;
result.number[j] = digit - 1;
}
a.number[j]--;
result.number[j]--;
}
}
result.DelZero();
return result;
}
else{
LongInt b(_b);
b.sign = !b.sign;
return _a + b;
}
}
my::LongInt my::operator /(my::LongInt const &_a, unsigned char const b)
{
unsigned int digit = Pow(2, CHAR_BIT);
LongInt retVal;
unsigned int r = 0;
unsigned int help;
for (int i = _a.number.GetSize() - 1; i >= 0; i--){
help = _a.number[i] + r * digit;
retVal.number[i] = help / b;
r = help % b;
}
retVal.DelZero();
return retVal;
}
