Условия и решения на задачите от лекция “Console Input Output”
Задача 1. Print Sum Of Three Integers
Условие: Write a program that reads 3 integer numbers from the console and prints their sum.
Решение:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace _1.PrintSumOfThreeIntegers
{
class Program
{
static void Main()
{
int a, b, c;
Console.Write("Enter the first number a:");
bool isaInt = int.TryParse(Console.ReadLine(), out a);
Console.Write("Enter the second number b:");
bool isbInt = int.TryParse(Console.ReadLine(), out b);
Console.Write("Enter the third number c:");
bool iscInt = int.TryParse(Console.ReadLine(), out c);
if (isaInt & isbInt & iscInt)
{
Console.WriteLine("sum={0}",a+b+c);
}
else
{
Console.WriteLine("Not a valid entry! Some of the numbers are not integer!");
}
}
}
}
Задача 2. Print Perimeter And Area Of A Circle
Условие: Write a program that reads the radius r of a circle and prints its perimeter and area.
Решение:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace _2.PrintPerimeterAndAreaOfACircle
{
class Program
{
static void Main()
{
double r;
Console.Write("Enter the radius r:");
bool isrInt = double.TryParse(Console.ReadLine(), out r);
if (isrInt)
{
Console.WriteLine("Perimeter={0}", 2 * Math.PI * r);
Console.WriteLine("Area={0}", Math.PI * r * r);
}
else
{
Console.WriteLine("Not a valid entry! r is not integer!");
}
}
}
}
Задача 3. Print Company Info
Условие: 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 them on the console.
Решение:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace _3.PrintCompanyInfo
{
class Program
{
static void Main()
{
//has name, address, phone number, fax number, web site and manager. The manager has first name, last name, age and a phone number
string companyName,address,phoneNumber,faxNumber,webSite,managerFirstName,managerLastName,managerPhoneNumber;
byte managerAge;
Console.Write("Enter the name of the company:");
companyName= Console.ReadLine();
Console.Write("Enter the address of the company:");
address = Console.ReadLine();
Console.Write("Enter the phone number of the company:");
phoneNumber = Console.ReadLine();
Console.Write("Enter the fax number of the company:");
faxNumber = Console.ReadLine();
Console.Write("Enter the web site of the company:");
webSite = Console.ReadLine();
Console.Write("Enter the first name of the manager:");
managerFirstName = Console.ReadLine();
Console.Write("Enter the last name of the manager:");
managerLastName = Console.ReadLine();
Console.Write("Enter the age of the manager:");
bool isAgeByte = byte.TryParse(Console.ReadLine(), out managerAge);
Console.Write("Enter the phone number of the manager:");
managerPhoneNumber = Console.ReadLine();
if (isAgeByte)
{
Console.WriteLine();
Console.WriteLine("Company name:".PadRight(23,' ')+"{0,30}".PadRight(30,' '),companyName);
Console.WriteLine("Address:".PadRight(23, ' ') + "{0,30}".PadRight(30, ' '), address);
Console.WriteLine("Phone number:".PadRight(23, ' ') + "{0,30}".PadRight(30, ' '), phoneNumber);
Console.WriteLine("Fax number:".PadRight(23, ' ') + "{0,30}".PadRight(30, ' '), faxNumber);
Console.WriteLine("Web site:".PadRight(23, ' ') + "{0,30}".PadRight(30, ' '), webSite);
Console.WriteLine("Manager:".PadRight(23, ' ') + "{0,30}".PadRight(30, ' '), managerFirstName + " " + managerLastName);
Console.WriteLine("Manager's age:".PadRight(23, ' ') + "{0,30}".PadRight(30, ' '), managerAge);
Console.WriteLine("Manager's phone number:".PadRight(23, ' ') + "{0,30}".PadRight(30, ' '), managerPhoneNumber);
}
else
{
Console.WriteLine("Not a valid entry! Manager's age is not a byte number!");
}
}
}
}
Задача 4. Print Number Of Devision By 5 Numbers
Условие: Write a program that reads two positive integer numbers and prints how many numbers p exist between them such that the reminder of the division by 5 is 0 (inclusive). Example: p(17,25) = 2.
Решение:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace _4.PrintNumberOfDevisionBy5Numbers
{
class Program
{
static void Main()
{
uint a, b;
uint p=0;
Console.Write("Enter the first number a:");
bool isaUint = uint.TryParse(Console.ReadLine(), out a);
Console.Write("Enter the second number b:");
bool isbUint = uint.TryParse(Console.ReadLine(), out b);
if (isaUint & isbUint)
{
if (a < b)
{
for (uint i = a; i <= b; i++) { if (i % 5 == 0) { p = p + 1; } } } else if (a > b)
{
for (uint i = b; i <= a; i++)
{
if (i % 5 == 0)
{
p = p + 1;
}
}
}
else
{
if (a % 5 == 0)
{
p = p + 1;
}
}
Console.WriteLine("p({0},{1})={2}",a,b,p);
}
else
{
Console.WriteLine("Not a valid entry! Some of the numbers are not unsigned integer!");
}
}
}
}
Задача 5. Print The Greater Number
Условие: Write a program that gets two numbers from the console and prints the greater of them. Don’t use if statements.
Решение:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace _5.PrintTheGreaterNumber
{
class Program
{
static void Main()
{
double a, b;
Console.Write("Enter the first number a:");
bool isaDouble = double.TryParse(Console.ReadLine(), out a);
Console.Write("Enter the second number b:");
bool isbDouble = double.TryParse(Console.ReadLine(), out b);
if (isaDouble & isaDouble)
{
Console.WriteLine("The greater number is:{0}", Math.Max(a,b));
}
else
{
Console.WriteLine("Not a valid entry! Some of the numbers are not double!");
}
}
}
}
Задача 6. Quadratic Equation Solution
Условие: 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).
Решение:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Globalization;
namespace _6.QuadraticEquationSolution
{
class Program
{
static void Main()
{
Thread.CurrentThread.CurrentCulture =CultureInfo.InvariantCulture;
double a, b, c, discriminant,x1,x2;
Console.Write("Enter the first coefficient a:");
bool isaDouble = double.TryParse(Console.ReadLine(), out a);
Console.Write("Enter the second coefficients b:");
bool isbDouble = double.TryParse(Console.ReadLine(), out b);
Console.Write("Enter the third coefficients c:");
bool iscDouble = double.TryParse(Console.ReadLine(), out c);
if (isaDouble & isbDouble & iscDouble)
{
discriminant = (b * b) - (4 * a * c);
if (discriminant > 0)
{
x1 = (-b + Math.Sqrt(discriminant)) / 2 * a;
x2 = (b + Math.Sqrt(discriminant)) / 2 * a;
Console.WriteLine("The real roots are:");
Console.WriteLine("x1={0}", x1);
Console.WriteLine("x2={0}", x2);
}
else if (discriminant == 0)
{
x1 = x2 = -b / 2 * a;
Console.WriteLine("The real roots are:");
Console.WriteLine("x1={0}", x1);
Console.WriteLine("x2={0}", x2);
}
else
{
Console.WriteLine("There are no real roots!");
}
}
else
{
Console.WriteLine("Not a valid entry! Some of the numbers are not double!");
}
}
}
}
Задача 7. Get Number N From Console
Условие: Write a program that gets a number n and after that gets more n numbers and calculates and prints their sum.
Решение:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Globalization;
namespace _7.GetNumberNFromConsole
{
class Program
{
static void Main()
{
Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture;
uint n;
double sum=0;
double inputNumber;
bool isValidEntry=true;
Console.Write("Enter the number n:");
bool isnInt = uint.TryParse(Console.ReadLine(), out n);
if (isnInt)
{
for (int i = 0; i < n; i++)
{
bool isInputNumberDouble = double.TryParse(Console.ReadLine(), out inputNumber);
if (isInputNumberDouble)
{
sum = sum + inputNumber;
}
else
{
Console.WriteLine("Not a number entry!");
isValidEntry = false;
break;
}
}
if (isValidEntry)
{
Console.WriteLine("sum={0}", sum);
}
}
else
{
Console.WriteLine("Not a valid entry! The number n is not integer!");
}
}
}
}
Задача 8. Print N Numbers
Условие: 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.
Решение:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace _8.PrintNNumbers
{
class Program
{
static void Main()
{
int n;
Console.Write("Enter the first number n:");
bool isnInt = int.TryParse(Console.ReadLine(), out n);
if (isnInt)
{
for (int i = 1; i <= n; i++)
{
Console.WriteLine(i);
}
}
else
{
Console.WriteLine("Not a valid entry! n is not an integer!");
}
}
}
}
Задача 9. Fibonacci Sequence
Условие: Write a program to print the first 100 members of the sequence of Fibonacci: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, …
Решение:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Numerics;
namespace _9.FibonacciSequence
{
class Program
{
static void Main()
{
BigInteger newElement;
BigInteger[] sequenceMembers = { 0, 1 };
Console.Write("{0},\n{1},\n", sequenceMembers[0], sequenceMembers[1]);
for (int i = 0; i < 98; i++)
{
newElement = sequenceMembers[0] + sequenceMembers[1];
Console.WriteLine("{0},",newElement);
sequenceMembers[0] = sequenceMembers[1];
sequenceMembers[1] = newElement;
}
}
}
}
Задача 10. Calculate The Sum
Условие: Write a program to calculate the sum (with accuracy of 0.001): 1 + 1/2 – 1/3 + 1/4 – 1/5 + …
Решение:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace _10.CalculateTheSum
{
class Program
{
static void Main()
{
float i=2;
float newMembre;
float sum=1;
do
{
if (i % 2 == 0)
{
newMembre = 1 / i;
}
else
{
newMembre = - 1 / i;
}
i++;
sum = sum + newMembre;
} while (Math.Abs(newMembre)>0.0001f);
Console.WriteLine("sum={0:F3}",sum);
}
}
}
Задача 11. Falling Rocks
Условие: Implement the „Falling Rocks“ game in the text console. A small dwarf stays at the bottom of the screen and can move left and right (by the arrows keys). A number of rocks of different sizes and forms constantly fall down and you need to avoid a crash.
Rocks are the symbols ^, @, *, &, +, %, $, #, !, ., ;, – distributed with appropriate density. The dwarf is (O). Ensure a constant game speed by Thread.Sleep(150).
Implement collision detection and scoring system.
Решение:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.IO;
using System.Data;
namespace _11.FallingRocks
{
class Program
{
static void WriteOnPosition(int x, int y, char symbol, ConsoleColor color = ConsoleColor.White)
{
Console.SetCursorPosition(x, y);
Console.ForegroundColor = color;
Console.Write(symbol);
}
static void WriteStringOnPosition(int x, int y, string Message, ConsoleColor color = ConsoleColor.White)
{
Console.SetCursorPosition(x, y);
Console.ForegroundColor = color;
Console.Write(Message);
}
struct Rock
{
public int x;
public int y;
public ConsoleColor color;
public char symbol;
}
struct Dwarf
{
public int x1;
public int x2;
public int x3;
public int y;
public ConsoleColor color;
public char firstSymbol;
public char secondSymbol;
public char thirdSymbol;
}
static void Main(string[] args)
{
char[] rockSymbols = { '^', '@', '*', '&', '+', '%', '$', '#', '!', '.', ';', '-' };
String[] lightColorNames = { "Cyan", "Gray", "Green", "Magenta", "Red", "White", "Yellow" };
char randomRockSymbol;
string userName;
int score = 0;
Console.BufferHeight = Console.WindowHeight = 30;
Console.BufferWidth = Console.WindowWidth = 60;
int playfildWidth = 35;
Dwarf dwarf = new Dwarf();
int lives = 3;
int rockWidth;
bool lifeTaken = false;
dwarf.x1 = 23;
dwarf.x2 = 24;
dwarf.x3 = 25;
dwarf.y = Console.WindowHeight - 1;
dwarf.firstSymbol = '(';
dwarf.secondSymbol = '0';
dwarf.thirdSymbol = ')';
dwarf.color = ConsoleColor.White;
string[] Names = new string[10];
int[] gameScores = new int[10];
Random randomGenerator = new Random();
List Rocks = new List();
do
{
Console.WriteLine("Please enter your name(maximum 10symbols):");
userName = Console.ReadLine();
}
while (userName.Length > 10);
while (true)
{
Rock newRock = new Rock();
ConsoleColor consoleColor = new ConsoleColor();
string randomColorName = lightColorNames[randomGenerator.Next(lightColorNames.Length)];
consoleColor = (ConsoleColor)Enum.Parse(typeof(ConsoleColor), randomColorName);
rockWidth = randomGenerator.Next(1, 5);
randomRockSymbol = rockSymbols[randomGenerator.Next(rockSymbols.Length)];
newRock.color = consoleColor;
newRock.x = randomGenerator.Next(0, playfildWidth - 1);
newRock.y = 0;
newRock.symbol = randomRockSymbol;
for (int i = 0; i < rockWidth; i++)
{
Rocks.Add(newRock);
if (newRock.x < playfildWidth - 1) { newRock.x++; } } if (Console.KeyAvailable) { ConsoleKeyInfo pressedKey = Console.ReadKey(true); while (Console.KeyAvailable) { Console.ReadKey(true); } if (pressedKey.Key == ConsoleKey.LeftArrow) { if (dwarf.x1 - 1 >= 0)
{
dwarf.x1--;
dwarf.x2--;
dwarf.x3--;
}
}
else if (pressedKey.Key == ConsoleKey.RightArrow)
{
if (dwarf.x3 + 1 <= playfildWidth - 1)
{
dwarf.x1++;
dwarf.x2++;
dwarf.x3++;
}
}
}
List newList = new List();
for (int i = 0; i < Rocks.Count; i++)
{
Rock oldRock = Rocks[i];
Rock rock = new Rock();
rock.x = oldRock.x;
rock.y = oldRock.y + 1;
rock.symbol = oldRock.symbol;
rock.color = oldRock.color;
if ((rock.x == dwarf.x1 || rock.x == dwarf.x2 || rock.x == dwarf.x3) && rock.y == dwarf.y)
{
if (lifeTaken == false)
{
lives--;
lifeTaken = true;
}
rock.symbol = 'x';
rock.color = ConsoleColor.Red;
}
if (rock.y < Console.WindowHeight)
{
newList.Add(rock);
}
}
Rocks = newList;
Console.Clear();
for (int i = 0; i < Console.WindowHeight; i++)
{
WriteOnPosition(playfildWidth, i, '|', ConsoleColor.Yellow);
}
WriteOnPosition(dwarf.x1, dwarf.y, dwarf.firstSymbol, dwarf.color);
WriteOnPosition(dwarf.x2, dwarf.y, dwarf.secondSymbol, dwarf.color);
WriteOnPosition(dwarf.x3, dwarf.y, dwarf.thirdSymbol, dwarf.color);
foreach (Rock rock in Rocks)
{
WriteOnPosition(rock.x, rock.y, rock.symbol, rock.color);
}
if (lifeTaken)
{
Rocks.Clear();
Thread.Sleep(300);
}
WriteStringOnPosition(playfildWidth + 10, Console.WindowHeight - 29, "Lives:");
WriteStringOnPosition(playfildWidth + 17, Console.WindowHeight - 29, Convert.ToString(lives));
WriteStringOnPosition(playfildWidth + 2, Console.WindowHeight - 26, userName + ":");
WriteStringOnPosition(playfildWidth + userName.Length + 3, Console.WindowHeight - 26, Convert.ToString(score));
if (lives < 1)
{
if (!File.Exists("scoring.txt"))
{
var scoringFile = File.Create("scoring.txt");
scoringFile.Close();
TextWriter writeInScoringFile = new StreamWriter("scoring.txt", true);
writeInScoringFile.Write("{0}:", userName);
writeInScoringFile.Write(Convert.ToString(score, 10).PadLeft(6, '0'));
writeInScoringFile.Close();
}
else
{
TextWriter writeInScoringFile = new StreamWriter("scoring.txt", true);
writeInScoringFile.Write("\n{0}:", userName);
writeInScoringFile.Write(Convert.ToString(score, 10).PadLeft(6, '0'));
writeInScoringFile.Close();
}
DataTable NamesScoresTable = new DataTable();
NamesScoresTable.Columns.Add("Names");
NamesScoresTable.Columns.Add("Scores");
string[] scores = System.IO.File.ReadAllLines("scoring.txt");
int i;
for (i = 0; i < scores.Length; i++) { string[] nameAndScore = scores[i].Split(':'); DataRow row = NamesScoresTable.NewRow(); row["Names"] = nameAndScore[0]; row["Scores"] = nameAndScore[1]; NamesScoresTable.Rows.Add(row); } DataView dataView = NamesScoresTable.DefaultView; dataView.Sort = "Scores desc"; DataTable sortedTable = dataView.ToTable(); int printPosition = 0; DataRow[] rows = sortedTable.Select(string.Empty); WriteStringOnPosition(playfildWidth + 2, Console.WindowHeight - 20, "Game over!", ConsoleColor.Red); WriteStringOnPosition(playfildWidth + 2, Console.WindowHeight - 13, "Score statistics:", ConsoleColor.Green); foreach (DataRow row in rows) { string scoreInfo; if (printPosition > 8)
{
scoreInfo = String.Format("{0}.{1}{2}", printPosition + 1, row["Names"].ToString().PadRight(9, ' '), Convert.ToString(int.Parse(row["Scores"].ToString())).PadLeft(9, ' '));
WriteStringOnPosition(playfildWidth + 2, Console.WindowHeight - 12 + printPosition, scoreInfo);
}
else
{
scoreInfo = String.Format("{0}.{1}{2}", printPosition + 1, row["Names"].ToString().PadRight(10, ' '), Convert.ToString(int.Parse(row["Scores"].ToString())).PadLeft(9, ' '));
WriteStringOnPosition(playfildWidth + 2, Console.WindowHeight - 12 + printPosition, scoreInfo);
}
printPosition++;
if (printPosition > 9)
{
break;
}
}
break;
}
lifeTaken = false;
score++;
Thread.Sleep(150);
}
WriteStringOnPosition(playfildWidth + 2, Console.WindowHeight - 19, "Press any key to exit.");
Console.ReadKey();
}
}
}