ConsolInputOutputHW

//1. Sum of 3 Numbers

using System;

//Write a program that reads 3 real numbers from the console and prints their sum. Examples:

//a     b    c      sum
//3     4    11       18
//-2    0    3        1
//5.5   4.5 20.1     30.1

class Program
{
    static void Main()
    {
        double a = double.Parse(Console.ReadLine());
        double b = double.Parse(Console.ReadLine());
        double c= double.Parse(Console.ReadLine());
        Console.WriteLine(a+b+c);
    }
}

//2. Print Company Information

using System;

//A company has name, address, phone number, fax number, web site and manager. The manager has first name,
//last name, age and a phone number. Write a program that reads the information about a company and its manager
//and prints it back on the console.

//program user

//Company name:       Software University
//Company address:     26 V. Kanchev, Sofia
//Phone number:        +359 899 55 55 92
//Fax number:
//Web site:          http://softuni.bg
//Manager first name:    Svetlin
//Manager last name:     Nakov
//Manager age:              25
//Manager phone:      +359 2 981 981
//
//Software University
//Address:      26 V. Kanchev, Sofia
//Tel. +359 899 55 55 92
//Fax: (no fax)
//Web site: http://softuni.bg
//Manager: Svetlin Nakov (age:
//25, tel. +359 2 981 981)

class Program
{
    static void Main()
    {
        string[] infoList = new string[9] { "Company name: ", "Company addreess: ", "Phone number: ", "Fax number: ",
                                                "Web site: ", "Manager first name: ", "Manager last name: ", "Manager age:",
                                                "Manager phone: " };
        string[] infoFromUser = new string[9];
        for (int i = 0; i < infoList.Length; i++)
        {
            Console.Write(infoList[i]);
            infoFromUser[i] = Console.ReadLine();
        }
        Console.WriteLine("------------------------------");
        string[] infoPrint = new string[8] { "", "Address: ", "Tel. ", "Fax: (no fax)", "Web site: ", "Manager: ", "age.", "tel. "};
        for (int i = 0; i < infoPrint.Length-2; i++)
        {
            Console.WriteLine();
            Console.Write(infoPrint[i]+infoFromUser[i]);
        }
            Console.Write(" "+infoFromUser[6]+"( "+infoPrint[6]+"\n"+infoFromUser[7]+" "+infoPrint[7]+infoFromUser[8]+")");
            Console.WriteLine();
    }
}

// 3. Circle Perimeter and Area

//Write a program that reads the radius r of a circle and prints its perimeter and area formatted with 2 digits after the
//decimal point. Examples:
//r   perimeter area
//2   12.57      12.57
//3.5 21.99      38.48

class Program
{
    static void Main()
    {
        //A = Pi * r^2
        //P = 2 * Pi * r
        Console.WriteLine("Write your radios...");
        double r = double.Parse(Console.ReadLine());
        double perimeter = 2 * Math.PI * r;
        double area = Math.PI * r * r;
        Console.WriteLine("Perimetar = {0}, Area = {1}",perimeter,area);
    }
}

// 4. Number Comparer

using System;

//Write a program that gets two numbers from the console and prints the greater of them. Try to implement this
//without if statements. Examples:

//a       b     greater
//5       6        6
//10      5        10
//0       0         0
//-5     -2        -2
//1.5     1.6       1.6

class Program
{
    static void Main()
    {
        int a = int.Parse(Console.ReadLine());
        int b = int.Parse(Console.ReadLine());
        if (a > b)
        {
            Console.WriteLine(a);
        }
        else if (a < b)
        {
            Console.WriteLine(b);
        }
        else if (a == b)
        {
            Console.WriteLine(a);
        }
    }
}

//5. Formatting Numbers

floating-point c and prints
//them in 4 virtual columns on the console. Each column should have a width of 10 characters. The number a should
//be printed in hexadecimal, left aligned; then the number a should be printed in binary form, padded with zeroes,
//then the number b should be printed with 2 digits after the decimal point, right aligned; the number c should be
//printed with 3 digits after the decimal point, left aligned. Examples:

//a            b              c                       result
//254        11.6            0.5              |FE |0011111110| 11.60|0.500 |
//499       -0.5559         10000             |1F3 |0111110011| -0.56|10000 |
//0           3            -0.1234            |0 |0000000000| 3|-0.123

class Program
{
    static void Main()
    {
        int a = int.Parse(Console.ReadLine());
        double b = double.Parse(Console.ReadLine());
        double c = double.Parse(Console.ReadLine());
        string myHexNumber = a.ToString("X");
        string myBinary = Convert.ToString(a, 2);
        Console.WriteLine("|{0,-10}|{1,10:D10}|{2,10:F2}|{3,-10:F3}|",myHexNumber,myBinary,b,c);
    }
}

//6. Quadratic Equation

using System;

//Write a program that reads the coefficients a, b and c of a quadratic equation ax2 + bx + c = 0 and solves it (prints
//its real roots). Examples:

//a           b          c             roots
//2           5         -3           x1=-3; x2=0.5
//-1          3          0           x1=3; x2=0
//-0.5        4         -8           x1=x2=4
//5           2          8         no real roots

class Program
{
    static void Main()
    {
        //double sqrtpart = b * b - 4 * a * c;
        //answer = (b + Math.Sqrt(sqrtpart)) / 2 * a;
        //textBox4.Text = answer.ToString();
    }
}

//7. Sum of 5 Numbers

using System;

//Write a program that enters 5 numbers (given in a single line, separated by a space), calculates and prints their
//sum. Examples:

//numbers       sum      numbers      sum       numbers            sum
//1 2 3 4 5      15   10 10 10 10 10   50    1.5 3.14 8.2 -1 0    11.84

class Program
{
    static void Main()
    {
        double[] numbersStrem = new double[5];
        double result = 0;
        for (int i = 0; i < numbersStrem.Length; i++)
        {
            numbersStrem[i] = double.Parse(Console.ReadLine());
             result += numbersStrem[i];

        }
        Console.WriteLine(result);

    }
}

//8. Numbers from 1 to n

using System;

//Write a program that reads an integer number n from the console and prints all the numbers in the interval [1..n],
//each on a single line. Note that you may need to use a for-loop. Examples:
//numbers      sum     numbers      sum       numbers      sum
//3               1
//                2
//                3

class Program
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        for (int i = 1; i <= n; i++)
        {
            Console.WriteLine(i);
        }
    }
}


//9. Sum of n Numbers

using System;

//Write a program that enters a number n and after that enters more n numbers and calculates and prints their sum.
//Note that you may need to use a for-loop. Examples:
//numbers sum numbers sum numbers sum

//3
//20
//60
//10
//90 5
//2
//6.5 1
//1
//-1
//-0.5
//4
//2

class Program
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        double sum = 0;
        double[] arr = new double[n];
        for (int i = 0; i < arr.Length; i++)
        {
            arr[i] = double.Parse(Console.ReadLine());
            sum += arr[i];
        }
        Console.WriteLine(sum);
        Console.WriteLine();
    }
}

//10. Fibonacci Numbers

sing System;

class Program
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        int x = 1;
        int y = 0;
        int z = 0;
        int counter = 0;
        for (int i = 0; i < n; i++)
        {
            counter++;
            z = x + y;
            x = y;
            y = z;
            z = x + y;
            Console.WriteLine(z);
        }
        Console.WriteLine("Item: " + counter);
    }
}