/* Real Estate Key Holder Real estate agents in this area place a locked box on the door handle. Inside this box is a key to the door. The box can be opened with a zero to ten digit code where order doesn't matter. The digits have a on or off switch inside the box. Each digit can be enter once. If all the on digits and none of the off digits are entered the box opens. Your task is two fold. First, randomly pick the on or off state of the digits (zero to nine) and solve the combination with an algorithm. Second, output the combination, the number of tries you made, and the total combinations available. https://code.sololearn.com/cJBUxt9M1CL3 https://www.sololearn.com/post/183430/?ref=app */ #include #include #include #include using namespace std; namespace { // the max size of the key (0-9) digits constexpr int NBITS { 10 }; // Total number of Combinations. If each key represents a bit, then total combinations are 2^10 constexpr int TCOMBS { 1024 }; // display key as numbers from 0 to 9 with positive or negative sign. '+' if keybit is 1, '-' if keybit is 0 void print_key(string_view key) { cout << "The Key is:\n"; for(size_t i{0}; i(tries).to_string()) break; return tries+1; }//end unlock_box }// end namespace int main() { srand(static_cast(time(0))); // generate a random key string const key = bitset( rand()%TCOMBS+1).to_string(); print_key(key); cout << "Number of tries required to" " open the box are " << unlock_box(key) << " out of " << TCOMBS << " Combinations\n"; }

[Challenge] Real_estate_key_holder.cpp