public static void Ex20()
{
Console.WriteLine("Please place your order: ");
int tv = ISSConsole.ReadInt("Quantity of TV: ");
int dvd = ISSConsole.ReadInt("Quantity of DVD: ");
int mp3 = ISSConsole.ReadInt("Quantity of MP3: ");
double discount;
int firstCost = tv * 900 + dvd * 500 + mp3 * 700;
if (firstCost >= 10000)
{
discount = 0.15;
}
else if (firstCost >= 5000)
{
discount = 0.1;
}
else
{
discount = 0;
}
double totalCost = (tv * 900 + dvd * 500) * (discount + 1) + mp3 * 700;
Console.WriteLine($"Total amount is: {totalCost}");
}
static void Main(string[] args)
{
Console.WriteLine("Enter your name");
string username = ISSConsole.ReadString();
Console.WriteLine("Enter your gender");
char gender = ISSConsole.ReadChar();
Console.WriteLine("Enter your age");
int age = ISSConsole.ReadInt();
if (gender == 'M')
{
if (age >= 40)
{
Console.WriteLine("Good morning Uncle {0}", username);
}
else
{
Console.WriteLine("Good morning Mr {0}", username);
}
}
else
{
if (age >= 40)
{
Console.WriteLine("Good morning Aunty {0}", username);
}
else
{
Console.WriteLine("Good morning Ms. {0}", username);
}
}
}
public static void Ex15()
{
Console.Write("Please insert a number to check if it is Armstrong number: ");
string a = ISSConsole.ReadString();
int num = Convert.ToInt32(a);
double sum = 0;
/*for (int i = 0; i < 3; i++)
* {
* char b = a[i];
* int c = Convert.ToInt32(new string(b, 1));
* sum += c * c * c;
* }*/
int digits = a.Length;
for (int i = num; i > 0; i /= 10)
{
int rem = i % 10;
sum += Math.Pow(rem, digits);
}
if (sum == num)
{
Console.WriteLine($"{a} is an Armstrong number.");
}
else
{
Console.WriteLine($"{a} is not an Armstrong number.");
}
}
public static void Ex18()
{
int marks = ISSConsole.ReadInt("Please input your Marks: ");
if (marks > 0 && marks < 100)
{
char grade; //Declaring
if (marks >= 80)
{
grade = 'A';
}
else if (marks >= 60)
{
grade = 'B';
}
else if (marks >= 40)
{
grade = 'C';
}
else
{
grade = 'F';
}
Console.WriteLine($"You scored {marks} marks which is {grade} grade.");
}
else
{
Console.WriteLine("**Error**");
}
}
static void Main(string[] args)
{
Console.Write("Enter the ordered quantity of TV");
int q_tv = ISSConsole.ReadInt();
Console.Write("Enter the ordered quantity of DVD");
int q_dvd = ISSConsole.ReadInt();
Console.Write("Enter the ordered quantity of MP3");
int q_mp3 = ISSConsole.ReadInt();
int price_tv = 900;
int price_dvd = 500;
int price_mp3 = 700;
double tv_orderedAmount = price_tv * q_tv;
double dvd_orderAmount = price_dvd * q_dvd;
double mp3_orderAmount = price_mp3 * q_mp3;
double totalOrderAmount = tv_orderedAmount + dvd_orderAmount + mp3_orderAmount;
Console.WriteLine("The total ordered amount without discount=" + totalOrderAmount);
if (totalOrderAmount > 5000 && totalOrderAmount < 10000)
{
totalOrderAmount = totalOrderAmount - totalOrderAmount * 0.1;
}
else if (totalOrderAmount > 10000)
{
totalOrderAmount = totalOrderAmount - totalOrderAmount * 0.15;
}
Console.WriteLine("The total ordered amount with discount=" + totalOrderAmount);
}
public static void Ex33()
{
int temp;
int n = ISSConsole.ReadInt("Please insert length of array: ");
int[] array = new int[n];
for (int i = 0; i < n; i++)
{
array[i] = ISSMath.RNDInt(100);
Console.Write($"\t{array[i]}");
}
Console.WriteLine();
Console.WriteLine("Simplified seclection sort method progess:");
for (int i = 0; i < n - 1; i++)
{
for (int j = i + 1; j < n; j++)
{
if (array[i] < array[j])
{
temp = array[i];
array[i] = array[j];
array[j] = temp;
for (int l = 0; l < n; l++)
{
Console.Write($"\t{array[l]}");
}
Console.WriteLine();
}
}
}
}
public static void Ex32()
{
int[] sales = new int[12];
for (int i = 0; i < 12; i++)
{
sales[i] = ISSConsole.ReadInt($"Please enter sales of month {i}: ");
}
int min = sales[0], max = sales[0];
int monthMin = 0, monthMax = 0;
int sum = sales[0];
for (int i = 1; i < 12; i++)
{
sum += sales[i];
if (sales[i] < min)
{
min = sales[i];
monthMin = i;
}
if (sales[i] > max)
{
max = sales[i];
monthMax = i;
}
}
Console.WriteLine($"The month with Maximum sales is {monthMax}");
Console.WriteLine($"The month with Minimum sales is {monthMin}");
Console.WriteLine($"The average monthly sales is {(double)sum/12:c}");
}
static void Main(string[] args)
{
Console.Write("Enter a number to find whether it is perfect");
int number = ISSConsole.ReadInt();
int pn = 0;
// findOdd();
for (int i = 1; i < number; i++)
{
if (number == 6)
{
pn = pn + i;
if (pn == number)
{
System.Console.WriteLine("Perfect number");
break;
}
}
else
{
for (int k = 1; k < 30; k++)
{
if (k % 2 != 0)
{
pn = pn + (int)Math.Pow(k, 3);
if (pn == number)
{
System.Console.WriteLine("Perfect number");
break;
}
}
}
}
}
}
static void Main(string[] args)
{
int comp_mind = ISSMath.RNDInt(9);
Console.WriteLine("In my mind=" + comp_mind);
int yourguess;
int count = 0;
do
{
if (count >= 1)
{
Console.WriteLine("Try again");
}
yourguess = ISSConsole.ReadInt("Guess the number in my mind");
++count;
} while (comp_mind != yourguess);
if (count <= 2)
{
Console.WriteLine("Congrats. you have made {0} attempts", count);
Console.WriteLine("You are a wizard");
}
else if (count >= 3 && count <= 5)
{
Console.WriteLine("You are a good guess");
}
else
{
Console.WriteLine("Your are lousy");
}
}
public static void Ex22()
{
int RandomInteger = ISSMath.RNDInt(10);
Console.WriteLine("Welcome to the Guess the Number Game!!");
Console.WriteLine("Please insert a number (0~9): ");
int count = 0;
int guess;
do
{
guess = ISSConsole.ReadInt();
if (guess != RandomInteger)
{
Console.WriteLine("Please try again!");
count++;
}
else
{
if (count <= 1)
{
Console.WriteLine("You are a Wizard!");
}
else if (count <= 4)
{
Console.WriteLine("You are a good guess!");
}
else if (count <= 9)
{
Console.WriteLine("You are lousy!");
}
}
}while (guess != RandomInteger);
}
static void Main(string[] args)
{
Console.WriteLine("Enter your name");
string username = ISSConsole.ReadString();
Console.WriteLine("Good morning " + username);
}
static void Main(string[] args)
{
Console.WriteLine("Enter your score");
int score = ISSConsole.ReadInt();
// char grade;
if (score >= 80 && score <= 100)
{
Console.WriteLine("You scored {0} marks which is A grade", score);
}
else if (score >= 60 && score <= 79)
{
Console.WriteLine("You scored {0} marks which is B grade", score);
}
else if (score >= 40 && score <= 59)
{
Console.WriteLine("You scored {0} marks which is C grade", score);
}
else if (score >= 0 && score <= 40)
{
Console.WriteLine("You scored {0} marks which is F grade", score);
}
else if (score < 0)
{
Console.WriteLine("**Error**");
}
else if (score > 100)
{
Console.WriteLine("**Error**");
}
}
public static void Ex26()
{
int n = ISSConsole.ReadInt("Please key in a number to check if it is Prime: ");
string result = " ";
while (n < 0)
{
Console.WriteLine("Please insert a positive number...");
n = ISSConsole.ReadInt();
}
if (n == 1 || n == 2)
{
result = "Prime.";
}
else
{
for (int i = 2; i <= n / 2; i++)
{
if (n % i == 0)
{
result = "Not Prime.";
}
else
{
result = "Prime.";
}
}
}
Console.WriteLine(result);
}
static void Main(string[] args)
{
Console.WriteLine("Enter a 3 digit number");
int number = ISSConsole.ReadInt();
int q = number;
int r = 0;
int sum = 0;
q = number / 100;
r = number % 100;
sum = (int)Math.Pow(q, 3);
q = r / 10;
r = r % 10;
sum = sum + (int)Math.Pow(q, 3);
sum = sum + (int)Math.Pow(r, 3);
if (sum == number)
{
System.Console.WriteLine("The number is an armstrong number");
}
else
{
System.Console.WriteLine("The number is not an armstrong number");
}
}
static void Main(string[] args)
{
int tempa, tempb;
Console.WriteLine("Enter 2 numbers");
int a = tempa = ISSConsole.ReadInt();
int b = tempb = ISSConsole.ReadInt();
int hcf = 0;
while (a != b)
{
if (b > a)
{
b = b - a;
hcf = b;
}
else
{
a = a - b;
hcf = a;
}
}
Console.WriteLine("HCF={0}", hcf);
Console.WriteLine("LCM={0}", tempa * tempb / hcf);
}
static void Main(string[] args)
{
Console.WriteLine("Enter a double precision number");
double number = ISSConsole.ReadDouble();
double squareRootOfNumber = Math.Sqrt(number);
Console.WriteLine("The square root of the number" + squareRootOfNumber);
}
static void Main(string[] args)
{
Console.WriteLine("Enter a double precision number");
double doubleNumber = ISSConsole.ReadDouble();
double squareDouble = doubleNumber * doubleNumber;
Console.WriteLine("the square of double precision number is =" + squareDouble);
}
static void Main(string[] args)
{
Console.WriteLine("Enter the km");
double kmsTravelled = ISSConsole.ReadDouble();
double fare = 2.40 + kmsTravelled * 0.4;
Console.WriteLine("The fare is {0:##.#0}", Math.Round(fare, 1));
}
static void Main(string[] args)
{
Console.WriteLine("Enter the value of x");
double x = ISSConsole.ReadDouble();
double y = 5 * Math.Pow(x, 2) - 4 * x + 3;
Console.WriteLine("The value of y is " + y);
}
static void Main(string[] args)
{
Console.WriteLine("Enter the centigrade");
double C = ISSConsole.ReadDouble();
double fahrenheit = 1.8 * C + 32;
Console.WriteLine("The fahrenheit is " + fahrenheit);
}
public static void Ex44() //Character replacement program
{
string s = ISSConsole.ReadString("Please insert string: ");
char c1 = ISSConsole.ReadChar("Character to be replaced: ");
char c2 = ISSConsole.ReadChar("Character chosen to replace: ");
substitute(s, c1, c2);
}
static void Main(string[] args)
{
Console.WriteLine("Enter an integer");
int number = ISSConsole.ReadInt();
double sqrtInt = Math.Sqrt(number);
Console.WriteLine("The square root of {0} is {1}", number, sqrtInt);
ISSConsole.Pause();
}
//Can we write string args[]?
static void Main(string[] args)
{
Console.WriteLine("Enter an integer");
int number = ISSConsole.ReadInt();
//We have Math.pow
int squareOfNumber = number * number;
Console.WriteLine("square of the number is=" + squareOfNumber);
}
// ------------------ STRING MANIPULATION TEEHEE --------------------------------//
public static void Ex36() //PALINDROME
{
string s = ISSConsole.ReadString("Please insert a string to check if it is a Palindrome:");
s = s.ToLower(); //Properties to convert all to lower
int n = s.Length; //Assign to a length of the string to a variable
bool check = true;
string r = "";
for (int i = 0; i < n; i++)
{
string letter = s.Substring(i, 1); //First parameter determines the starting index and strings starts with [0],
//the second parameter determines the amount of char to concatenate
//this step breaks it down into individual letters and assign it to letter
if (letter.CompareTo("a") >= 0 && letter.CompareTo("z") <= 0) //method instance ** Clarify this part from StackOverflow
{
r += letter;
}
}
//Program
for (int i = 0; i < r.Length; i++)
{
if (r[n - 1 - i] != r[i])
{ //if
check = false;
}
}
if (check != false)
{
Console.WriteLine($"{s} is a Palindrome.");
}
else
{
Console.WriteLine($"{s} is not a Palindrome.");
}
//more elegant code
//public static boolean Palindrom(char[] word)
//{
// int i1 = 0;
// int i2 = word.length - 1;
// while (i2 > i1)
// {
// if (word[i1] != word[i2])
// {
// return false;
// }
// ++i1;
// --i2;
// }
// return true;
//}
}
static void Main(string[] args)
{
Console.WriteLine("Enter a double precision number to find square root and round to 3 decimals");
double number = ISSConsole.ReadDouble();
double sqrt = Math.Sqrt(number);
double round3 = Math.Round(sqrt);
Console.WriteLine("The square root of " + number + " is " + sqrt + " \n" + "It is rounded of to 3 decimals as {0:##.###}", sqrt);
// Console.WriteLine("The square root of " + number + " is " + sqrt);
//Console.WriteLine("The rounded value is {0:##.000}" , sqrt);
}
public static void Ex21()
{
int x;
do
{
Console.Write("Please key a number: ");
x = ISSConsole.ReadInt();
}while (x != 88);
Console.WriteLine("Lucky you...");
}
public static void Ex24()
{
int n = ISSConsole.ReadInt("Please input number to find it's squart root: ");
double g = ISSMath.RND();
while (g * g != n)
{
g = (g + n / g) / 2;
}
Console.WriteLine($"Squart root of {n} is {g}");
}
static void Main(string[] args)
{
Console.WriteLine("Enter a number for factorial");
int number = ISSConsole.ReadInt();
int factorial = 1;
for (int i = 1; i <= 5; i++)
{
factorial = factorial * i;
}
Console.WriteLine("The factorial is {0}", factorial);
}
static void Main(string[] args)
{
//do while
int number = 0;
do
{
Console.WriteLine("Enter a number");
number = ISSConsole.ReadInt();
} while (number != 88);
Console.WriteLine("Lucky you");
}
static void Main(string[] args)
{
int comp_mind = ISSMath.RNDInt(9);
int yourguess;
int count = 0;
do
{
yourguess = ISSConsole.ReadInt("Guess the number in my mind");
++count;
} while (comp_mind != yourguess);
Console.WriteLine("Congrats. your have made {0} attempts", count);
}
