void Stack<Type>:: pop() {
if(top_of_stack==-1){
throw underflow_error("Stack underflow");
}
top_of_stack--;
return;
}
bignum& bignum::operator--()
{
if(sign_ && value_.all())
throw_with_nested(underflow_error("number is too small"));
if(value_.none())
sign_ = false;
value_.flip_until(!sign_);
return *this;
}
void __throw_underflow_error(const char* s) { throw underflow_error(s); }
