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i just try to make this.
writing a program which create an array of of integer numbers and initializes each the elements with the element's index value, multiplid by five.
print the result
and my code is :..
Console.Title = " Arrays ";
Console.BackgroundColor = ConsoleColor.White;
Console.ForegroundColor = ConsoleColor.Black;
Console.Clear();
Console.WriteLine(" This Program Is About Partial Automation Array :-");
Console.WriteLine(" ====================================================");
Console.Write("\n Please Enter The Size Of Array : ");
int n = Convert.ToInt32(Console.ReadLine());
int[] arr1 = new int[n];
Console.WriteLine(" =====================================");
// Multible Process :-
for (int i = 0; i < n; i++)
{
arr1[i] = arr1[i] * 5;
}
// Displaying Process :-
Console.WriteLine(" \nThe Result Is :-");
Console.WriteLine(" ================");
for (int i = 0; i < n; i++)
{
Console.Write(" "+ arr1[i] + "\t");
}
Please change arr1[i] = arr1[i] * 5; to arr1[i] = i * 5;
use linq:
const int N = 10;
var array = Enumerable.Range(0, N)
.Select((x, i) => i * 5)
.ToArray();
foreach (var element in array) {
Console.WriteLine($"Value: {element}");
}
Related
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I'm trying to build a square shape
string BuildSquare(int n)
{
for (int p = 1; p <= n; p++)
{
for (int i = 1; i <= n; i++)
{
Console.Write("+");
}
Console.WriteLine();
}
}
When done, the above error keeps showing not all code paths return a value I've tried returning 0, null, true; but they all fail
BuildSquare must return a string. Your code is not returning anything.
Console.Write/Console.WriteLine is not a way to return anything.
Based on your code I think you need this:
string BuildSquare(int n)
{
var sb = new StringBuilder();
for (int p = 1; p <= n; p++)
{
for (int i = 1; i <= n; i++)
{
sb.Append("+");
}
sb.AppendLine();
}
return sb.ToString();
}
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I'm a newbie.
I have a problem with C#, I don't know why program prints me a "0" at the end of the first row :( Plz halp.
namespace Tabliczka_mnożenia
{
class Program
{
static void NumbersInRow(int x)
{
Console.Write(" ");
for (int i = x; i <= 10; i++)
{
Console.Write(i);
Console.Write(" ");
}
}
static void NumbersInColumn(int y)
{
for (int i = y; i <= 10; i++)
{
Console.WriteLine(i);
Console.Write(" ");
}
}
static void Main(string[] args)
{
int x = 1;
int y = 0;
Console.Write(" ");
NumbersInRow(x);
NumbersInColumn(y);
}
}
https://i.stack.imgur.com/ljsLW.jpg
The 0 is printed intentionally from the NumbersInColumn function. You have just forgotten to print a line break after the NumbersInRow function, like this:
static void NumbersInRow(int x)
{
Console.Write(" ");
for (int i = x; i <= 10; i++)
{
Console.Write(i);
Console.Write(" ");
}
Console.WriteLine("");
}
0 is printed by NumbersInColumn method.
WriteLine methods writes 0(y=0) and moves cursor to a new line.
In your case y starts with 0. You are then calling console.writeline() which writes whatever you want and then goes to the next line.
You should return a new line before starting to iterate through the rows.
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I don't get the correct answer of the factorial the second time I enter a number.
using System;
namespace Outcome2
{
class Program
{
static void Main(string[] args)
{
int t, FactR = 1;
do
{
Console.Write("Enter no.: ");
t = Convert.ToInt32(Console.ReadLine());
if (t < 0)
Console.WriteLine("Factorial of Negative number's can't be found ");
else if (t <= 1)
Console.WriteLine("{0}! = {1}", t, FactR);
else
{
for (int counter = t; counter >= 2; counter--)
{
FactR = FactR * counter;
}
Console.WriteLine("{0}! = {1}", t, FactR);
}
Console.WriteLine("Do you wish to quit? Y/N");
} while (Console.ReadKey().KeyChar != 'Y');
}
}
}
its probably because you don't reset the FactRvariable you can do it like this.
do{
if (t < 0)
Console.WriteLine("Factorial of Negative number's can't be found ");
else if (t <= 1)
Console.WriteLine("{0}! = {1}", t, FactR);
else
{
FactR = 1;
for (int counter = t; counter >= 2; counter--)
{
FactR = FactR * counter;
}
Console.WriteLine("{0}! = {1}", t, FactR);
}
Console.WriteLine("Do you wish to quit? Y/N");
} while (Console.ReadKey().KeyChar != 'Y');
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I want to read 20 items but only 19 are read through console. Any idea why ?
What I'd like my code to do is :
1st : read the interger k from the standard input buffer (console)
2nd : read 20 integers into the array int x[]
static void Main(string[] args)
{
int k ;
int[] x = new int [20];
int[] y = new int [20];
int[] yval = new int[20];
int i;
Console.WriteLine("Enter k value");
k = Console.Read();
Console.WriteLine("Enter x values\n ");
for (i = 0; i <=19 ; i+=1)
{
x[i] = int.Parse(Console.ReadLine());
yval[i] = (x[i] + k) % 26;
}
}
Jon addressed the root of the problem in the comments, but I wanted to try to answer more fully. Console.Read() will only read a single character and return an integer representing the character, probably not what you want. Any characters after that are immediately read on the first pass, probably not what you expected. The issue can be illustrated by inspecting the values:
static void Main(string[] args)
{
int k;
int[] x = new int[20];
int[] y = new int[20];
int[] yval = new int[20];
int i;
Console.WriteLine("Enter k value");
k = Console.Read();
Console.WriteLine("k = {0}", k);
Console.WriteLine("Enter x values\n ");
for (i = 0; i <= 19; i += 1)
{
var input = Console.ReadLine();
x[i] = int.Parse(input);
yval[i] = (x[i] + k) % 26;
Console.WriteLine("x[{0}] = {1}", i, x[i]);
}
Console.WriteLine("Press any key...");
Console.ReadKey();
}
If you enter "12" for k, the output looks like:
Enter k value
12
k = 49
Enter x values
x[0] = 2
The first character '1' is saved to k as int value of 49 (ASCII value for '1'). The buffer still has a '2' and a newline to be read. They get read on the first pass through the loop and stored in the first element of the array.
As Jon said, you probably want k = int.Parse(Console.ReadLine()); instead.
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Closed 9 years ago.
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I need help with a program.
I need to write a program that prints on the console numbers from 1 to N that can't divide in the same time by 3 or 7. I need to parse N so the user inputs a value for it. Here is my code for now, can you tell me what is wrong?
Console.Write("Enter a number: ");
int n = int.Parse(Console.ReadLine());
for (n = 1; n <= 99999; n++) {
//n % (3 * 7) == 0
I thought out how I will check it but I can't think out how to make the other part. I think there is something wrong with my loop too. Can you give me some hints where I am mistaken and what I can do? Thank you!
You're getting N from the user then immediately overwriting it. Use a different variable for your loop:
int n = int.Parse(Console.ReadLine());
for (int i = 1; i <= n; i++)
// do stuff
You can use Modulus %
Console.Write("Enter a number: ");
string input = Console.ReadLine();
int n;
if (int.TryParse(input, out n))
{
for (int i = 1; i < n; i++)
{
if(i % 3 != 0 || i% 7!= 0) Console.WriteLine(i);
}
}
Your loop is wrong because your condition is wrong.It should be i < n, you are getting an input but then you overwriting it's value by n = 1;
Console.Write("Enter a number: ");
int n = int.Parse(Console.ReadLine());
for (int i = 1; i <= n; i++)
{
if (i % 21 != 0) { Console.Write(i + " "); }
}
Example: http://ideone.com/ThASen