AMAZON ORDER

#include <iostream>

#include<algorithm>

#include<vector>

#include<list>

#include<map>

#include<unordered_map>

 using namespace std;

 class inventory{

    public:

map<string,int>m;

inventory(){

m.emplace("TV",100);

m.emplace("HDTV",75);

m.emplace("HP LAPTOP",45);

m.emplace("PLAYSTATION 5",30);

m.emplace("NINTENDO SWITCH 2",60);

}

 string toUpper(string str) {

        transform(str.begin(), str.end(), str.begin(), ::toupper);

        return str;

 }

void order( ){

    while(true){

    cout<<" what do you want to order ?"<<endl;

    string s;

    cin >> ws; // remove leading spaces

        getline(cin, s); // allow spaces in product names

        s = toUpper(s);

        if(s=="EXIT"){

            cout<<" thank you for shopping "<<endl;

            exit(0);

        }

    if(m.find(s)!=m.end()){

    cout<<" your order is "<<s<<endl;

    }

    else{

        cout<<" your order is invalid "<<endl;

    }

cout<<" enter the quantity of your order "<<endl;

int q;

cin>>q;

if(q<=0){

    cout<<" invalid quantity "<<endl;

    return;

}

if(q>m[s]){

    cout<<"Sorry we have "<<m[s]<<" stock only ";

    return;

}

m[s] -= q;

            cout << "Quantity of your order is " << q << endl;

            cout << "Remaining quantity is " << m[s] << endl;

}

}

 };

 int main() {

    inventory I;

    I.order();

 return 0;

 }

STUDENT DATABASE

 #include <iostream>

#include<vector>

#include<list>

#include<map>

#include<unordered_map>

using namespace std;

template<class T1,class T2>

class students{

    public:

    int n;

    map<T1, T2> m;

    students(){

    cout<<" enter the no of students "<<endl;

    cin>>n;

    }

    void input(){

    for(int i=0;i<n;i++){

        T1 name;

        T2 value;

        cin>>name>>value;

        m[name]=value;

    }

    }

    void display(){

        for(auto&p:m){

            cout<<" name of student is "<<p.first<<endl;

             cout<<" ID of student is "<<p.second<<endl;

        }

    }

};

 

 int main() {

 students<string,int>s;

 s.input();

 s.display();

 return 0;

 }

CURRENCY CONVERTER 2.0

 #include <iostream>

#include<map>

#include<string>

using namespace std;

class currency{

    map<pair<string,string>,double>converter;

public:

currency(){

    converter[{"USD", "INR"}] = 83.12;

        converter[{"INR", "USD"}] = 0.012;

        converter[{"USD", "KWD"}] = 0.31;

        converter[{"KWD", "USD"}] = 3.25;

        converter[{"GBP", "INR"}] = 105.6;

        converter[{"INR", "GBP"}] = 0.0094;

        converter[{"AED", "USD"}] = 0.27;

        converter[{"USD", "AED"}] = 3.67;

}

void convert(){

    string fromCurrency,toCurrency;

    float amount;

    cout<<"\navailable currencies:USD,INR,KWD,GBP,AED\n";

    cout<<" enter from currency code "<<endl;

    cin>>fromCurrency;

    cout<<" enter to currency code "<<endl;

    cin>>toCurrency;

    cout<<" enter amount "<<endl;

    cin>>amount;

    pair<string,string>key={fromCurrency,toCurrency};

    if(converter.find(key)!=converter.end()){

        float rate=converter[key];

        float result=rate*amount;

        cout << amount << " " << fromCurrency << " = " << result << " " << toCurrency << endl;

    }else {

            cout << "Conversion rate not found.\n";

        }      

}

};

 

 int main() {

 currency c;

    char choice;

    do {

        c.convert();

        cout << "\nDo you want to convert again? (y/n): ";

        cin >> choice;

    } while (choice == 'y' || choice == 'Y');

    cout << "Thank you for using the Currency Converter.\n";

    return 0;

}

 

 

CURRENCY CONVERTER IN C++

#include <iostream>

 using namespace std;

 class currency{

    float Amount;

int choice;

    public:

currency(float c  ){

    Amount=c;

    cout<<" the money in your account is "<<Amount<<endl;

    if(Amount<0){

cout<<"invalid amount entered"<<endl;

exit(0);

}

}

void selection(){

    cout<<" select your currency "<<endl;

    cout<<" available currencies are -: \n 1.Dollar\n 2.rupee\n 3.pound\n4.Dinar\n5.Dirham\n ";

    cin>>choice;

    if(choice==1){

        cout<<" you have "<<Amount<<" dollars "<<endl;

        DOLLAR();

    }

    if(choice==2){

        cout<<" you have "<<Amount<<" rupees "<<endl;

        RUPEES();

    }

    if(choice==3){

        cout<<" you have "<<Amount<<" pounds "<<endl;

        POUNDS();

    }

    if(choice==4){

        cout<<" you have "<<Amount<<" dinars "<<endl;

        DINARS();

    }

    if(choice==5){

        cout<<" you have "<<Amount<<" darahim "<<endl;

        DIRHAM();

    }

}

void DOLLAR(){

    int a;

    cout<<" select currency to convert into \n1.Rupees\n2.Pounds\n3.Dinar\n4.Dirham\n";

    cin>>a;

    if(a==1){

        cout<<" you have "<<Amount*87.81<<" rupees "<<endl;

    }

    if(a==2){

        cout<<" you have "<<Amount*0.75<<" pounds "<<endl;

    }

    if(a==3){

        cout<<" you have "<<Amount*0.306<<" dinar "<<endl;

    }

if(a==4){

        cout<<" you have "<<Amount*3.67<<" dirham "<<endl;

    }

}

void RUPEES(){

    int b;

    cout<<" select currency to convert into \n1.Dollar\n2.Pounds\n3.Dinar\n4.Dirham\n";

    cin>>b;

    if(b==1){

        cout<<" you have "<<Amount*0.011<<" dollars "<<endl;

    }

    if(b==2){

        cout<<" you have "<<Amount*0.0086<<" pounds "<<endl;

    }

    if(b==3){

        cout<<" you have "<<Amount*0.0035<<" dinar "<<endl;

    }

if(b==4){

        cout<<" you have "<<Amount*0.042<<" dirham "<<endl;

    }

}

void POUNDS(){

    int c;

    cout<<" select currency to convert into \n1.Dollars\n2.Rupees\n3.Dinar\n4.Dirham\n";

    cin>>c;

    if(c==1){

        cout<<" you have "<<Amount*1.33<<" dollars "<<endl;

    }

    if(c==2){

        cout<<" you have "<<Amount*116.82<<" rupees "<<endl;

    }

    if(c==3){

        cout<<" you have "<<Amount*0.41<<" dinar "<<endl;

    }

if(c==4){

        cout<<" you have "<<Amount*4.88<<" dirham "<<endl;

    }

}

void DINARS(){

    int d;

    cout<<" select currency to convert into \n1.Dollars\n2.Rupees\n3.Pounds\n4.Dirham\n";

    cin>>d;

    if(d==1){

        cout<<" you have "<<Amount*3.27<<" dollars "<<endl;

    }

    if(d==2){

        cout<<" you have "<<Amount*287.29<<" rupees "<<endl;

    }

    if(d==3){

        cout<<" you have "<<Amount*2.46<<" pounds "<<endl;

    }

if(d==4){

        cout<<" you have "<<Amount*12.02<<" dirham "<<endl;

    }}

void  DIRHAM(){

    int e;

    cout<<" select currency to convert into \n1.Dollar\n2.Rupees\n3.Pounds\n4.Dinar\n";

    cin>>e;

    if(e==1){

        cout<<" you have "<<Amount*0.27<<" dollar "<<endl;

    }

    if(e==2){

        cout<<" you have "<<Amount*23.91<<" rupees "<<endl;

    }

    if(e==3){

        cout<<" you have "<<Amount*0.20<<" pounds "<<endl;

    }

if(e==4){

        cout<<" you have "<<Amount*0.083<<" dirham "<<endl;

    }

}

 };

 int main() {

    currency A(5);

    A.selection();

 return 0;

 

 }

HYBRID CALCULATOR WITH TEMPLATES(C++)

#include <iostream>

#include<cmath>

 using namespace std;

 template <class T>

  class calculator{//making base class

public:

T sum(T a,T b){

return a+b;

}

T difference(T a,T b){

   

    return a-b;

}

T product(T a,T b){

    return a*b;

}

T quotient(T a,T b){

   

    return a/b;

}

T remainder(T a,T b){

   

return a%b;

}

 virtual void display(T a,T b){//displaying main arithemetic operations-addition,subtraction,division and multiplication

    cout<<" the sum of two numbers "<<a<<" and " <<b<<" is "<<sum(a,b)<<endl;

    cout<<" the difference of two numbers " <<a<<" and "<< b<< " is "<<difference(a,b)<<endl;

    cout<<" the product of two numbers "<<a<< " and "<< b<<" is "<<product(a,b)<<endl;

    cout<<" the quotient of two numbers "<<a<<" and "<< b<<" is  "<<quotient(a,b)<<endl;

    cout<<" the remainder of two numbers "<<a<<" and "<< b<<" is "<<remainder(a,b)<<endl;

}

 };

 template <class T>

 class scientificCalcualtor:virtual public calculator<T>{//making derived class

public:

T square(T a){

    return pow(a,2);

}

T cube(T a){

    return pow(a,3);

}

T squareroot(T a){

return sqrt(a);

}

void display(T a){//displaying sceintific operations implemented using cmath

cout<<" the square of "<<a<<" is "<<square(a)<<endl;

cout<<" the cube of " <<a<<" is "<<cube(a)<<endl;

cout<<" the squareroot of "<<a<< " is "<<squareroot(a)<<endl;

}

void display(T a,T b){//drawing from base class

    calculator<T>::display(a,b);

}

 };

 template <class T>

 class hybridCalc:virtual public calculator<T>,virtual public scientificCalcualtor<T>{//multilevelinheritance

    public:

void display(T a,T b){//using display function from display classes

calculator<T>::display(a,b);

scientificCalcualtor<T>::display(a);

scientificCalcualtor<T>::display(b);

}

 };

 

 int main(){

hybridCalc<int> H;

H.display(76,45);

 return 0;

 }

CALCULATOR(WITH TEMPLATES) IN C++

 #include <iostream>

 using namespace std;

 template <class T>

class sum{

T c;

    public:

 sum (T a,T b){

     c=a+b;

   

}

T display(){

    cout<<" value of c is "<<c<<endl;

    T d=c*c;

    cout<<"Value of c's square is "<<d<<endl;

    return d ;

 }

};

template <class T>

class calculator{

T a;

T b;

public:

T sum(T c,T d){

    a=c;

    b=d;

    return a+b;

}

T difference(T c,T d){

    a=c;

    b=d;

    return a-b;

}

T product(T c,T d){

    a=c;

    b=d;

    return a*b;

}

T quotient(T c,T d){

    a=c;

    b=d;

    return a/b;

}

void display(T c,T d){

    a=c;

    b=d;

    cout<<" the sum of a and b is "<<sum(c,d)<<endl;

    cout<<" the difference of a and b is "<<difference(c,d)<<endl;

    cout<<" the product of a and b is "<<product(c,d)<<endl;

    cout<<" the quotient of a and b is "<<quotient(c,d)<<endl;

}

};

 int main() {

 calculator<double> c;

 c.display(5,6);

 return 0;

 }

TEXT ADVENTURE GAME(IN JAVA)

import java.util.*; //importing for user input

public class GAME2 {

    static Scanner s = new Scanner(System.in);

    static int playerHp;

    static String playerName;

    static String playerWeapon;

    static Random rc = new Random();

    static int monsterHp = rc.nextInt(6) + 5; // Random HP between 5 and 10

    static int siverRing;

    public static void main(String[] args) {

        playerSetup();

        TownGate(); // Start game at town gate

    }

    public static void playerSetup() {

        playerHp = 10;

        playerWeapon = "AXE"; // Remove extra spaces for string matching

        System.out.println("YOUR HP IS " + playerHp);

        System.out.println("YOUR WEAPON IS " + playerWeapon);

        System.out.println("ENTER YOUR NAME PLEASE");

        playerName = s.nextLine();

        System.out.println("Hello, " + playerName + ". Let's start your adventure!");

    }

// starting of game

    public static void TownGate() {

        System.out.println("\n-----------------------------------------\n");

        System.out.println("You are at the town gate.");

        System.out.println("A guard is in front of the gate.");

        System.out.println("What do you want to do?");

        System.out.println("1. Talk to the guard");

        System.out.println("2. Attack the guard");

        System.out.println("3. Leave");

        int choice = s.nextInt();

        s.nextLine();

        if (choice == 1) {

            System.out.println("Guard: Hello there, stranger. So, your name is " + playerName + "?\nSorry, we cannot let a stranger enter our town.");

            TownGate();

        } else if (choice == 2) {

            playerHp -= 1;

            System.out.println("Guard: What the hell?! Don't be stupid!");

            System.out.println("The guard hits you hard. You lose 1 HP.");

            System.out.println("Your HP: " + playerHp);

            TownGate();

        } else if (choice == 3) {

            CrossRoad();

        } else {

            TownGate();

        }

    }

//At crossroad

    public static void CrossRoad() {

        System.out.println("\n-----------------------------------------\n");

        System.out.println("You are at a crossroad.");

        System.out.println("1. Go north");

        System.out.println("2. Go south");

        System.out.println("3. Go east");

        System.out.println("4. Go west");

        int option = s.nextInt();

        s.nextLine(); // consume newline

        if (option == 1) {

            north();

        } else if (option == 2) {

            south();

        } else if (option == 3) {

            east();

        } else if (option == 4) {

            west();

        } else {

            CrossRoad();

        }

    }

//going to north and hp retaining mechanism

    public static void north() {

        System.out.println("\n-----------------------------------------\n");

        System.out.println("You find a peaceful river. You rest and drink some water.");

        if (playerHp < 10) {

            playerHp += 1;

            System.out.println("You have recovered 1 HP. Your HP is now " + playerHp);

        } else {

            System.out.println("Your HP is already full.");

        }

        System.out.println("1. Go back to the crossroad");

        System.out.println("2. Stay here ");

        int choice = s.nextInt();

        s.nextLine();

        if (choice == 1) {

            CrossRoad();

        } else {

            north();

        }

    }

//go to south and visit town again

    public static void south() {

        TownGate();

    }

//finding new weapon in east 

    public static void east() {

        System.out.println("\n-----------------------------------------\n");

        System.out.println("You walked into a forest and found a Long Sword!");

        playerWeapon = "Long Sword";

        System.out.println("Your new weapon is: " + playerWeapon);

        System.out.println("1. Go back to the crossroad");

        int choice = s.nextInt();

        s.nextLine();

        if (choice == 1) {

            CrossRoad();

        } else {

            east();

        }

    }

//fighting enemy in west

    public static void west() {

        System.out.println("\n-----------------------------------------\n");

        System.out.println("You encounter a goblin!");

        System.out.println("1. Fight");

        System.out.println("2. Run");

        int choice = s.nextInt();

        s.nextLine();

        if (choice == 1) {

            fight();

        } else if (choice == 2) {

            CrossRoad();

        } else {

            west();

        }

    }

    public static void fight() {

        System.out.println("\n-----------------------------------------\n");

        System.out.println("Your HP: " + playerHp);

        System.out.println("Goblin HP: " + monsterHp);

        System.out.println("1. Attack");

        System.out.println("2. Run");

        int choice = s.nextInt();

        s.nextLine();

        if (choice == 1) {

            attack();

        } else if (choice == 2) {

            CrossRoad();

        } else {

            fight();

        }

    }

//attack and fighting mechanism

    public static void attack() {

        int weaponDamage = 0;

        if (playerWeapon.equals("AXE")) {

            weaponDamage = rc.nextInt(5) + 1; // 1-5

        } else if (playerWeapon.equals("Long Sword")) {

            weaponDamage = rc.nextInt(6) + 4; // 4-9

        }

        System.out.println("You attack the goblin and deal " + weaponDamage + " damage.");

        monsterHp -= weaponDamage;

        if (monsterHp < 1) {

            win();

            return;

        }

        System.out.println("Goblin HP is now: " + monsterHp);

        // Monster counterattacks

        int monsterDamage = rc.nextInt(5) + 1;

        playerHp -= monsterDamage;

        System.out.println("The goblin attacks you back and deals " + monsterDamage + " damage.");

        System.out.println("Your HP is now: " + playerHp);

        s.nextLine();

        if (playerHp < 1) {

            lose();

        } else {

            fight();

        }

    }

//on defeating goblin

    public static void win() {

        System.out.println("\n-----------------------------------------\n");

        System.out.println("You defeated the goblin!");

        System.out.println("He dropped a ring");

        System.out.println("You got a siver ring");

        siverRing=1;

        System.out.println("1.go south to town");

        int choice=s.nextInt();

        if(choice==1) {

        Town();

        }else {

        win();

        }

        monsterHp = rc.nextInt(6) + 5; // Reset for another fight if needed

        CrossRoad();

    }

    

//on getting defeated by goblin

public static void lose() {

        System.out.println("\n-----------------------------------------\n");

        System.out.println("You have been defeated by the goblin...");

        System.out.println("GAME OVER");

        System.exit(0);

    }//after defeating goblin and arriving at town

public static void Town() {

System.out.println("\n-----------------------------------------\n");

System.out.println("you go to town and go to guard ");

System.out.println("Would you like to:\n1.show your ring\n2.leave");

int choice=s.nextInt();

if(choice==1) {

TownElder();

}

else if(choice==2) {

CrossRoad();

}else {

Town();

}

System.out.println("\n-----------------------------------------\n");

}

public static void TownElder() {

System.out.println("You show silver ring to guard \n he looks surprised!!!!!!!!!!!!!!!");

System.out.println("He takes you directly to TownELder,te head of town");

System.out.println("TownElder sees your ring and says\n\"this ring is very imprtant for us as it was crafted by our ancestors\nand it has been preserved by us for generations");

System.out.println("Recently,a very powerful goblin stole it from us and we could not get it back");

System.out.println("We would like you to become out town's protector,so say,what was your name again?" +playerName+ " yeah,so "+playerName+" ,would you like to be our protector");

System.out.println("what would you do?\n1.become the protector\n2.leave the town");

int choice=s.nextInt();

if(choice==1) {

ending();

}

else if(choice==2) {

CrossRoad();

}

else {

TownElder();

}

System.out.println("\n-----------------------------------------\n");

}

//ending of game

public static void ending() {

System.out.println("So,from here now you will be given your title according to your choice,choose one");

System.out.println("Choose one from them-:\n1.The Silver Lion of Valor\n2.Knight of the Eternal Oath\n3.Warden of the Broken Sigil\n4.The Crimson Bladebearer\n5.Champion of the Hollow Crown");

String playerTitle="";

int choice=s.nextInt();

switch(choice) {

case 1:playerTitle="The Silver Lion of Valor";

break;

case 2:playerTitle="Knight of the Eternal Oath";

break;

case 3:playerTitle="Warden of the Broken Sigil";

break;

case 4:playerTitle="The Crimson Bladebearer";

break;

case 5:playerTitle="Champion of the Hollow Crown";

break;

default:

System.out.println("Could not decide one,huh!,well I have a name for you,you get the title of Spadidus,meaning\"descending from sparda\" ,the warrior who founded this town  ");

playerTitle="Spadidus";

}

System.out.println("So,now you hold the title of "+playerTitle);

System.out.println("congratulations,you won " +playerName+ " with the title of "+playerTitle);

System.out.println("GAME OVER");

System.exit(0);

}

}