#include #include #include #include //for advance class book{ friend std::ostream &operator << (std::ostream &out, const book &rhs); std::string title; int price; public: book(): title{"Unknown"}, price{0}{}//will be used in resizing of forward_list book(std::string title,int price) :title{title},price{price}{} bool operator<(const book &rhs) const{ return price < rhs.price; } bool operator==(const book &rhs) const{ return (title==rhs.title) && (price==rhs.price); } }; std::ostream &operator << (std::ostream &out, const book &rhs){ out< void display(const std::forward_list &l){ std::cout<<"[ "; for(auto n: l){ std::cout< l1 {1,2,3,4,5,6}; display(l1); std::forward_list l3; l3 = {2,4,6,8,10}; display(l3); l3.push_front(-1);//push_front display(l3); l3.pop_front();//pop_front display(l3); std::forward_list l4(10,5);//ten 5s display(l4); } //.max_size(),.front(),.clear() void func2(){ std::cout<<"=====================func2======================"< l1 {1,2,3,4,5,6,7,8,9,10}; display(l1); std::cout<<"l1.max_size() : "<< l1.max_size() < l1 {1,2,3,4,5,6,7,8,9,10}; display(l1); l1.resize(5); display(l1); l1.resize(10); display(l1); std::forward_list l2; l2.resize(5);//default ctor will be called for 5 objects display(l2);//observe the o/p, analyze for how } //.insert_after(it,n) or .insert_after(it, forward_list),advance(it,+-n), .erase_after(it) void func4(){ std::cout<<"=====================func4======================"< l1 {1,2,3,4,5,6,7,8,9,10}; display(l1); auto it = std::find(l1.begin(), l1.end(), 5);//iterator to 5 if(it != l1.end()) l1.insert_after(it, 100);//insert 100 after 5, it will point to 5 display(l1); std::forward_list l2 {1000,2000,3000}; l1.insert_after(it, l2.begin(), l2.end());//insert forward_list l2 after 5 display(l1); std::advance(it, 4);//point at 100 l1.erase_after(it);//after 100,i.e. 6 erased: it become invalid display(l1); } //.emplace_after(obj) void func5(){ std::cout<<"=====================func5======================"< l1 { {"Physics",75}, {"Chemistry",45}, {"Math",105} }; display(l1); //insert Art after Chemistry //find chemistry first auto it = std::find(l1.begin(), l1.end(), book{"Chemistry",45}); if(it != l1.end()){ l1.emplace_after(it, "Art", 30);//default ctor called and inserted after Chemistry } display(l1); } //.sort() : issue void func6(){ std::cout<<"=====================func6======================"< l1 { {"Physics", 75}, {"Chemistry", 45}, {"Math", 105}, {"Art", 35}, {"Biology", 65} }; display(l1); l1.sort();//overloaded < is used here display(l1); } int main(){ func1(); std::cout<

STL forward_list