Skip to content

Rita Solution #4

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
ritasoludo wants to merge 1 commit into
base: main
Choose a base branch
from
Open

Rita Solution #4

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
366 changes: 366 additions & 0 deletions rita_solution.dart
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,366 @@
Name:Soludo Ucheaku Rita
Tag No:15

import 'dart:math';
import 'displayin.dart';
import 'package:exam2/exam2.dart' as exam2;
class stringManipulator {
String reverseString(String input){
List<String>chars = input.split();
chars = chars.reversed.toList();
return chars.join();
}
}
class Person{
String name;
int age;
// Constructor to initialize the attributes
Person(this.name,this.age);
//Method to display person's information
void displayInfo(){
print("Name: $name,Age: $age");
}
}
class Rectangle {
double lenght;
double width;
//Constructor to initialize the attributes
Rectangle(this.length,this,width);
//Method to calculate the area of the rectangle
double calculateArea(){
return lenght * width;
}
}
class Circle {
double radius;
//Constructor to initialize the attribute
Circle(this.radius);
//Method to calculateCircumference of the circle
double calculateCircumference(){
return 2*3.14159*radius;
}
}
class BankAccount {
double balance;
// Construction to initialize the balance
BankAccount(this.balance);
// Method to deposit money into the account
void deposit(double amount){
if (amount > 0){
balance += amount;
print("Deposited: \$${amount.toStringAsFixed(2)}");
} else{
print("Ïnvalid deposit amount");
}
}
// Method to withdraw money from the account
void withdraw(double amount){
if (amount > 0 && amount <= balance){
balance -= amount;
print("Withdrawn: \$${amount.toStringAsFixed(2)}");
} else {
print("Invalid withdrawal amount or insufficient funds");
}
}
// Method to check the account balance
void checkBalance(){
print("Account Balance: \$${balance.toStringAsFixed(2)}");
}
}
class Student {
String name;
int age;
double grade;
// Constructor to initialize attibrutes
Student(this.name,this.age,this.grade);
// Method to determine if a student passed or failed
void checkPassOrFail(){
if (grade >= 60.0){
print("$name passed!");
} else {
print("$name failed.");
}
}
}
class Calcualtor{
// Method to add two numbers
double add(double num1, double num2){
return num1 + num2;
}
// Method to subtract two numbers
double subtract(double num1, double num2){
return num1 - num2;
}
// Method to multiply two numbers
double multiply(double num1, double num2){
return num1 * num2;
}
// Method to divide two numbers
double divide(double num1, double num2){
if (num2!= 0){
return num1 / num2;
} else {
print("Error:Division by zero is not allowed");
return double.nan; // Return NaN for division by zero
}
}
}
class Car {
bool isStarted = false;
double fuelLevel = 0.0;
// Method to start the car
void start(){
if (!isStarted){
print("Car is starting....");
isStarted = true;
} else {
print("Car is alrready started.");
}
}
// Method to stop the car
void stop(){
if (isStarted){
print("Car is stopping....");
isStarted = false;
} else {
print("Car is already stopped");
}
}
// Method to check the fuel level
void checkFuelLevel(){
print("FuelLevel: ${fuelLevel.toStringAsFixed(2)}gallons");
}
}
class Employee {
String name;
double salary;
// Constructor to initialize attributes
Employee(this.name,this.salary);
// Method to give a bonus to the employee
void giveBonus(double bonusAmount){
if (bonusAmount > 0){
salary += bonusAmount;
print("$name received a bonus of \$${bonusAmount.toStringAsFixed(2)}");
} else {
print("Ivalid bonus amount");
}
}
}
class Triangle {
double base;
double height;
// Constructor to initialize attributes
Triangle(this.base,this.height);
// Method to calculate the area of the triangle
double calcualateArea(){
return 0.5*base*height;
}
}
double calculateTriangleArea(double base, double height){
return 0.5*base*height;
}
double findSquareRoot(double number){
if (number < 0){
print("Cannot calculate the square root of a negative number.");
return double.nan; // Return NaN for invalid input
}
return sqrt(number);
}
void main(){
//define a dart function that takes two parameters(int a,int b)and returns their sum
int sum(int a, int b){
return a + b;
}
//Example usage of the sum function
int result = sum(3,7);
print("The sum is:$result");//Output:The sum is: 10
//2
int factorial(int n){
if (n == 0 || n == 1){
return 1;
} else {
return n* factorial(n-1);
}
}
print(factorial(3));
//3
bool isPrime(int num){
if (num <= 1){
return false; //0 and 1 are not prime numbers
}
for (int i = 2; i <= num /2; i++){
if(num % i == 0){
return false; //The number is divisible by i,so its not prime
}
}
return true; //The number is prime
}
print(isPrime(4));
//4
double celsiusToFahrenheit(double celsius){
return (celsius* 9/5) + 32;
}
print(celsiusToFahrenheit(10));
//5
StringManipulator
sm=StringManipulator();
print(sm.reverseString("end"));
//6 answer
Person
person=Person("rita",42);
person.displayInfo();
//7
Rectangle rectangle=Rectangle(4,4);
double area=rectangle.calculateArea();
print(area);
//8
Circle circle=Circle(5);
print(circle.calculateCircumference());
//9
BankAccount account=BankAccount(1000.0);
account.checkBalance();//Output:Account Balance:$1000.0
account.deposit(500.0);//Output:Deposited: $500.00
account.checkBalance();//Output: Account Balance: $1500.00
account.withdraw(200.00);//Output:Withdraw: $200.00
account.checkBalance();//Output:Account: $1300.00
//10
Student student1 = Student("Älice",20,75.5);
student1.checkPassOrFail(); //Output: Alice passed!
Student student2 = Student ("Bob", 22,45.0);
student2.checkPassOrFail(); //Output:Bob failed.
//10b
Calculator calculator = Calculator();
double resultAdd= calculator.add(5.0,3.0);
print("Addition Result: $resultAdd"); //Output:Addition Result:8.0
double resultSubtract= calculator.subtract(8.0,3.0);
print("Subtraction Result: $resultSubtract"); //Output:Subtraction Result: 5.0
double resultMultiply = calculator.multiply(4.0,2.5);
print("Multiplication Result: $resultMultiply"); //Output: Multiplication Result: 10.0
double resultDoivide = calculator.divide(15.0,3.0);
print("Division Result: $result Divide"); //Output: Division Result: 5.0
double resultDivideByZero = calculator.divide(10.0,0.0); //Output: Error: Division by zero is not allowed
//Division Result:NaN
//11
Car myCar();
myCar.start();
//Output: Car is starting...,
myCar.checkFuelLevel();
//Output:Fuel Level: 0.00 gallons
myCar.stop();
//Output: Car is stopping...
myCar.checkFuelLevel();
//Output: Fuel Level: 0.00 gallons
myCar.start();
//Output: Car is starting...
myCar.checkFuelLevel();
//Output: Fuel Level: 0.00 gallons
myCar.fuelLevel = 20.5;
//Set fuel level to 20.5 gallons
myCar.checkFuelLevel();
//Output: Fuel Level: 20.50 gallons
//12
int findMax(List<int>numbers){
if (numbers.isEmpty){
print("The list is empty.");
}
int max = numbers[0];
for (int number in numbers){
if (number > max){
max = number;
}
}
return max;
}
List<int>numbers = [4,12,5,8,21,3,17];
int maxNumber = findMax(numbers);
//if (maxNumber !=null){
print("The maximum element in the list is $maxNumber");
}
//13
Employee employee1 = Employee("Rita",50000.0);
Employee employee2 = Employee("Mike",60000.0);
employee1.giveBonus(2000.0); //Output: Rita received a bonus of $2000.00
employee2.giveBonus(-1000.0); //Output: Invalid bonus amount.
//Print updated salary after giving bonuses
print("Updated Salary for ${employee1.name}:\$${employee1.salary.toStringAsFixed(2)}");
//14
//Example using the Triangle class Triangle triangle1 = Triangle(6.0, 8.0);
double area1= triangle1.calculateArea();
Triangle triangle2 = Triangle(5.0, 12.0);
double area2 = triangle2.calculateArea();
//Example using the calculate TriangleArea function
double base = 4.0;
double height = 10.0;
double area = calculateTriangleArea(base,height);
//15//
double inputNumber = 25.0;
double result = findSquareRoot(inputNumber);
if ("!result.isNaN"){
print("The square root of $inputNumber is: $result");
}
//16//
List<int>generateFibonacci(int limit){
List<int>fibonacciList = [];
if (limit < 1){
print("Invalid limit.Please provide a positive integer.");
return[];
}
int prev = 0;
int current = 1;
while (current <= limit){
fibonacciList.add(current);
int next = prev + current;
prev = current;
current = next;
}
return fibonacciList;
}
int limit = 50;
List<int>fibonacciNumbers = generateFibonacciList(limit);
if (fibonacciNumbers.isNotEmpty){
print("Fibonacci numbers up to $limit: $fibonacciNumbers");
}
//17//
bool isLeapYear(int year){
if (year % 4 == 0){
if (year % 100 == 0){
// If the year is divisible by 100,it must also be divisible by 400 to be a leap year
return year % 400 == 0;
} else {
// If the year is divisible by 4 but not by 100,it is a leap year
return true;
}
} else {
// If the year is not divisible by 4,it is not a leap year
return false;
}
}
int yearToCheck = 2024;
if (isLeapYear(yearToCheck)){
print("$yearToCheck is a leap year");
} else {
print("$yearToCheck is not a leap year");
}
//18//
int factorial(int n){
if (n == 0 || n == 1){
// Base case: 0! and 1! are both 1 return 1;
}else {
//Recursive case: n! = n* (n-1)!
return n* factorial(n-1);
}
}
int number = 5;
int result = factorial(number);{
print("Factorial of $number is:$result");
}
//19//
List<int> filterEvenNumbers(List<int> numbers){
return numbers.where((number) => number % 2 == 0).toList();
}
void main(){
List<int>evenoriginalList =[1,2,3,4,5,6,7,8,9,10];
List<int>evenNumbers =filterEvenNumbers(originalList);
print("Original List: $originalList");
print("Even Numbers: $evenNumbers");
}