my divison should work, but I have an error with my operator-= when i try to substract reminder-=tmp.nb.

How can I fix it?

This is my code:

//my class Uint.hpp

class Uint { private: string nb; //variable public: // Constructors Uint(); // Default constructeur Uint(size_t n); // Constructeur avec size_t 

Uint& operator*=(const Uint& other);

friend Uint operator*(Uint lhs, const Uint & rhs);

//my file Uint.cpp

Uint::Uint() = default; Uint::Uint(size_t n){ string u; while (n > 0) { if (n % 2 == 0) u.insert(u.begin(), '0'); else u.insert(u.begin(), '1'); n /= 2; } this->nb = u; } 

Uint& Uint::operator/=(const Uint& autre){ Uint remainder; Uint div; Uint tmp=autre; if(nb==tmp.nb){ div.nb+='1'; } else { for (int i = 0; i < nb.size(); i++) { remainder += nb[i]; int w = stoi(remainder.nb, nullptr, 2); int ww = stoi(tmp.nb, nullptr, 2); if (remainder.nb.size() < tmp.nb.size()) { div.nb += "0"; } else if (remainder.nb.size() >= tmp.nb.size() && (w - ww > 0)) { div.nb += "1";  //The problem si here -->>> remainder-=tmp.nb; } else div.nb += '0'; } } div.eraseZero(); return *this=div; }