Ввод в textBox

#pragma once
 
#include<string>
#include <sstream>
 
using namespace std;
class vector
{
private:
    double x;
    double y;
    double z;
public:
 
    vector()
    {
        x = 0;
        y = 0;
        z = 0;
    }
    ~vector() {}
    vector(double znachX, double znachY, double znachZ)
    {
        x = znachX;
        y = znachY;
        z = znachZ;
    }
 
    vector operator +(const vector& othersum)
    {
        vector tempsum;
        tempsum.x = x + othersum.x;
        tempsum.y = y + othersum.y;
        tempsum.z = z + othersum.z;
        return tempsum;
    }
 
    vector operator *(const vector& othervect)
    {
        vector tempvect;
        tempvect.x = y * othervect.z - z * othervect.x;
        tempvect.y = (z * othervect.x - x * othervect.z) * (-1);
        tempvect.z = x * othervect.y - y * othervect.x;
        return tempvect;
    }
 
    double operator %(const vector& otherskal)
    {
        vector tempskal;
        tempskal.x = this->x * otherskal.x;
        tempskal.y = this->y * otherskal.y;
        tempskal.z = this->z * otherskal.z;
        return tempskal.x + tempskal.y + tempskal.z;
    }
    double operator /(const vector& otherugol)
    {
        double tempugol;
        tempugol = cos((this->x * otherugol.x + this->y * otherugol.y) / (sqrt(pow(this->x, 2) + pow(this->y, 2)) * sqrt(pow(otherugol.x, 2) + pow(otherugol.y, 2))));
        return tempugol;
    }
 
    string print ()
    {
        string out;
        out = to_string(x) + "*i, " + to_string(y) + "*j, " + to_string(z) + "*k ";
        return out;
    }
};
 
 
#pragma endregion
    private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) {
        double ax, ay, az, bx, by, bz, AB, BC, AC;
        ax = Convert::ToDouble(textBox1->Text);
        ay = Convert::ToDouble(textBox2->Text);
        az = Convert::ToDouble(textBox3->Text);
        bx = Convert::ToDouble(textBox4->Text);
        by = Convert::ToDouble(textBox5->Text);
        bz = Convert::ToDouble(textBox6->Text);
 
        vector a(ax, ay, az);
        vector b(bx, by, bz);
 
        vector sumC = a + b;
        vector c = sumC * a;
        double d = a % b;
        AB = a / b;
        BC = b / c;
        AC = a / c;
        
        textBox8->Text = Convert::ToString(d);
        textBox9->Text = Convert::ToString(AB);
        textBox10->Text = Convert::ToString(BC);
        textBox11->Text = Convert::ToString(AC);
        textBox7->Text = gcnew String((c.print()).c_str());
        
    }
private: System::Void button2_Click(System::Object^ sender, System::EventArgs^ e) {
    Close();
}
 
};
}

#include <sstream>
#include <iomanip>
 
// ...
 
class vector
{
// ...
    std::string print() {
        std::ostringstream ss;
        ss << std::setprecision(3) << x << "*i, " << y << "*j, " << z << "*k";
        return ss.str();
    }
};