How easy to Create bug with unsigned/NSUInteger in C/C++ and Objective-C 


        unsigned num = 10;
        int negative = -10;
        if(negative < num)
            cout << "Ok"<< endl;
        else
            cout << "Bug" << endl;

 


        unsigned n = 0;
        cout << "n-1=" << n-1<< endl;
        if(n - 1 < 0)
            cout << "Ok" << endl;
        else
            cout << "Bug" << endl;

 


        std::vector < int> v1 = {};
        for(unsigned i=0; i < v1.size()-1; i++){
            cout << "v1[" << i << "]=" << v1[i] << endl;
        }

        for(size_t i=0; i < v1.size()-1; i++){
            cout << "v1[" << i << "]=" << v1[i] << endl;
        }





    Unsigned int and abs() function, abs() is not defined in Unsigned int type




    vector v1 = {1, 2};
    vector v2 = {1, 2, 3};
    unsigned int x = abs(v1.size(), v2.size());
    // Compiler ERROR: call ambiguous abs()