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($"Total amount is: {totalCost}");
}
public static void Ex18()
{
int marks = ISSConsole.ReadInt("Please input your Marks: ");
if (marks > 0 && marks < 100)
{
char grade; //Declaring
if (marks >= 80)
{
grade = 'A';
}
else if (marks >= 60)
{
grade = 'B';
}
else if (marks >= 40)
{
grade = 'C';
}
else
{
grade = 'F';
}
Console.WriteLine($"You scored {marks} marks which is {grade} grade.");
}
else
{
Console.WriteLine("**Error**");
}
}
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 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);
}
}
}
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 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");
}
}
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 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}");
}
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();
}
}
}
}
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 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.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 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);
}
//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);
}
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();
}
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($"Squart root of {n} is {g}");
}
public static void Ex21()
{
int x;
do
{
Console.Write("Please key a number: ");
x = ISSConsole.ReadInt();
}while (x != 88);
Console.WriteLine("Lucky you...");
}
static void Main(string[] args)
{
//do while
int number = 0;
do
{
Console.WriteLine("Enter a number");
number = ISSConsole.ReadInt();
} while (number != 88);
Console.WriteLine("Lucky you");
}
static void Main(string[] args)
{
Console.WriteLine("Enter a number for factorial");
int number = ISSConsole.ReadInt();
int factorial = 1;
for (int i = 1; i <= 5; i++)
{
factorial = factorial * i;
}
Console.WriteLine("The factorial is {0}", factorial);
}
static void Main(string[] args)
{
int comp_mind = ISSMath.RNDInt(9);
int yourguess;
int count = 0;
do
{
yourguess = ISSConsole.ReadInt("Guess the number in my mind");
++count;
} while (comp_mind != yourguess);
Console.WriteLine("Congrats. your have made {0} attempts", count);
}
static void Main(string[] args)
{
int factorial = 1;
Console.WriteLine("Enter a number");
int num = ISSConsole.ReadInt();
for (int i = num; i > 0; i--)
{
factorial = factorial * i;
}
Console.WriteLine("The factorial is {0}", factorial);
}
public static void Ex25()
{
int n = ISSConsole.ReadInt("Please insert a number to find it's factorial:");
int factorial = 1;
if (n == 0)
{
factorial = 0;
}
else
{
for (int i = 1; i <= n; i++) //for (int i=n; i>0;i--)
{
factorial *= i;
}
}
Console.WriteLine($"Factorial of {n} is {factorial}");
}
static void Main(string[] args)
{
int n = 0;
Console.WriteLine("Enter a number to find square root");
//Random r = new Random();
//Console.Write("Random"+r.Next(9));
n = ISSConsole.ReadInt();
int g = ISSMath.RNDInt(n);
int sqrt;
while (g * g != n)
{
g = (g + (n / g)) / 2;
}
sqrt = g;
Console.WriteLine("The square root of {0} is {1}", n, sqrt);
}
public static void Ex27()
{
int n = ISSConsole.ReadInt("Please key in a number to check if it is Perfect number: ");
int sum = 0;
for (int i = 1; i < n; i++)
{
if (n % i == 0)
{
sum += i;
}
}
if (sum == n)
{
Console.WriteLine($"{n} is a Perfect Number.");
}
else
{
Console.WriteLine($"{n} is not a Perfect Number.");
}
}
static void Main(string[] args)
{
Console.Write("Enter a number to check prime");
int number = ISSConsole.ReadInt();
bool prime = true;
for (int i = 2; i < number; i++)
{
if (number % i == 0)
{
prime = false;
break;
}
}
if (prime)
{
Console.WriteLine("Prime");
}
else
{
Console.WriteLine("Not Prime");
}
}
static void usingWhile(string[] args)
{
Console.WriteLine("Enter a 3 digit number");
int number = ISSConsole.ReadInt();
int q = number;
int r = 0;
int sum = 0;
while (q != 0)
{
r = q % 10;
q = q / 10;
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");
}
}
public static void Ex34()
{
int maxIndex = 0;
int max;
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($"\t{array[i]}");
}
Console.WriteLine();
max = array[0];
Console.WriteLine("Refined selection sort method progess:");
for (int i = 0; i < n - 1; i++)
{
for (int j = i + 1; j < n; j++)
{
if (array[j] > max)
{
max = array[j];
maxIndex = j;
}
}
//swap:
array[maxIndex] = array[i];
array[i] = max;
for (int l = 0; l < n; l++)
{
Console.Write("\t" + array[l]);
}
Console.WriteLine($"\tMax= {max}");
max = array[i + 1];
maxIndex = i + 1;
}
}
public static void Ex23() //hcf & lcf
{
Console.WriteLine("Please input the 2 numbers to get its LCM and HCF:");
int n1 = ISSConsole.ReadInt("Number 1 = ");
int n2 = ISSConsole.ReadInt("Number 2 = ");
int multiply = n1 * n2;
while (n1 != n2)
{
if (n1 > n2)
{
n1 -= n2;
}
else
{
n2 -= n1;
}
}
int hcf = n1;
int lcm = multiply / hcf;
Console.WriteLine($"LCM = {lcm}");
Console.WriteLine($"HCF = {hcf}");
}
public static void Ex17()
{
Console.Write("Your name: ");
string name = Console.ReadLine();
int age = ISSConsole.ReadInt("Age: ");
Console.Write("Gentle (F/M): ");
char gender = ISSConsole.ReadChar();
if (gender == 'F' || gender == 'f')
{
if (age < 40)
{
Console.WriteLine($"Good morning Ms. {name}");
}
else
{
Console.WriteLine($"Good morning Aunty {name}");
}
}
else if (gender == 'M' || gender == 'm')
{
if (age < 40)
{
Console.WriteLine($"Good morning Mr. {name}");
}
else
{
Console.WriteLine($"Good morning Uncle {name}");
}
}
else
{
Console.WriteLine("Please insert your Gender pls");
}
}
static void Main()
{
Console.Write("Please choose an exercise 15-48: ");
int choose = ISSConsole.ReadInt();
switch (choose)
{
case 15:
Exercise.Ex15();
break;
case 16:
Exercise.Ex16();
break;
case 17:
Exercise.Ex17();
break;
case 18:
Exercise.Ex18();
break;
case 19:
Exercise.Ex19();
break;
case 20:
Exercise.Ex20();
break;
case 21:
Exercise.Ex21();
break;
case 22:
Exercise.Ex22();
break;
case 23:
Exercise.Ex23();
break;
case 24:
Exercise.Ex24();
break;
case 25:
Exercise.Ex25();
break;
case 26:
Exercise.Ex26();
break;
case 27:
Exercise.Ex27();
break;
case 28:
Exercise.Ex28();
break;
case 29:
Exercise.Ex29();
break;
case 30:
Exercise.Ex30();
break;
case 31:
Exercise.Ex31();
break;
case 32:
Exercise.Ex32();
break;
case 33:
Exercise.Ex33();
break;
case 34:
Exercise.Ex34();
break;
case 35:
Exercise.Ex35();
break;
case 36:
Exercise.Ex36();
break;
case 37:
Exercise.Ex37();
break;
case 38:
Exercise.Ex38();
break;
case 40:
Exercise.Ex40();
break;
case 41:
Exercise.Ex41();
break;
case 42:
Exercise.Ex42();
break;
case 43:
Exercise.Ex43();
break;
case 44:
Exercise.Ex44();
break;
#region /* Do not remove this or write codes after this */
ISSConsole.Pause();
#endregion
}
}
