void RealNumber::substract(RealNumber & secondNumber) {
    if(this->positive && secondNumber.positive) {
        std::string test = substractPositive(secondNumber);
        this->myNumber = substractPositive(secondNumber);
    }
    else if(!this->positive && !secondNumber.positive) {
        this->myNumber = substractPositive(secondNumber);
    }
    else if(!this->positive && secondNumber.positive) {
        this->myNumber = addPositive(secondNumber);
    }
    else if(this->positive && !secondNumber.positive) {
        secondNumber.positive=true;
        this->myNumber = addPositive(secondNumber);
    }

}

void RealNumber::substractA(RealNumber & secondNumber) {
    if(this->positive && secondNumber.positive) {
        this->myNumber = substractPositive(secondNumber);
    }
    else if(!this->positive && !secondNumber.positive) {
        secondNumber.positive=true;
        this->myNumber = substractPositive(secondNumber);
    }
    else if(!this->positive && secondNumber.positive) {
        this->myNumber = addPositive(secondNumber);
    }
    else if(this->positive && !secondNumber.positive) {
        secondNumber.positive=true;
        this->myNumber = addPositive(secondNumber);
    }
}