Software Development

software development notes, main category for Cs, Java, and other programming experiences.

System maximums and minimums

Posted on by coder 

   
 
using System;

class Test {

  public static void Main() {
       // First, print out the minimum values
       Console.WriteLine("System Minimums
");
       Console.WriteLine( "MinSByte {0}", System.SByte.MinValue);
       Console.WriteLine( "MinByte {0}", System.Byte.MinValue);
       Console.WriteLine( "MinInt16 {0}", System.Int16.MinValue);
       Console.WriteLine( "MinUInt16 {0}", System.UInt16.MinValue);
       Console.WriteLine( "MinInt32 {0}", System.Int32.MinValue);
       Console.WriteLine( "MinUInt32 {0}", System.UInt32.MinValue);
       Console.WriteLine( "MinInt64 {0}", System.Int64.MinValue);
       Console.WriteLine( "MinUInt64 {0}", System.UInt64.MinValue);
       Console.WriteLine( "MinChar {0}", System.Char.MinValue);
       Console.WriteLine( "MinSingle {0}", System.Single.MinValue);
       Console.WriteLine( "MinDouble {0}", System.Double.MinValue);
       // Console.WriteLine( "MinBoolean {0}", System.Boolean.MinValue);
       Console.WriteLine( "MinDecimal {0}", System.Decimal.MinValue);
    
       Console.WriteLine("
System Maximums
");
       Console.WriteLine( "MaxSByte {0}", System.SByte.MaxValue);
       Console.WriteLine( "MaxByte {0}", System.Byte.MaxValue);
       Console.WriteLine( "MaxInt16 {0}", System.Int16.MaxValue);
       Console.WriteLine( "MaxUInt16 {0}", System.UInt16.MaxValue);
       Console.WriteLine( "MaxInt32 {0}", System.Int32.MaxValue);
       Console.WriteLine( "MaxUInt32 {0}", System.UInt32.MaxValue);
       Console.WriteLine( "MaxInt64 {0}", System.Int64.MaxValue);
       Console.WriteLine( "MaxUInt64 {0}", System.UInt64.MaxValue);
       Console.WriteLine( "MaxChar {0}", System.Char.MaxValue);
       Console.WriteLine( "MaxSingle {0}", System.Single.MaxValue);
       Console.WriteLine( "MaxDouble {0}", System.Double.MaxValue);
       Console.WriteLine( "MaxDecimal {0}", System.Decimal.MaxValue);
  }
}

Test for an Even or Odd Value

Posted on by coder 

   
 
using System;
using System.Data;


class Class1{
        static void Main(string[] args){
           Console.WriteLine(IsEven(0));
           Console.WriteLine(IsEven(3));
           Console.WriteLine(IsOdd(2));
           Console.WriteLine(IsOdd(1));

        }
    public static bool IsEven(int intValue)
    {
      return ((intValue & 1) == 0);
    }

    public static bool IsOdd(int intValue)
    {
      return ((intValue & 1) == 1);
    }
}

Is it a double number

Posted on by coder 

   
 

using System;
using System.Data;
using System.Text.RegularExpressions;

class Class1{
        static void Main(string[] args){
      string IsNotNum = "111west";
      string IsNum = "  +111  ";
      string IsFloat = "  23.11  ";
      string IsExp = "  +23 e+11  ";
      
      Console.WriteLine(IsNumericFromTryParse(IsNum));    // True
      Console.WriteLine(IsNumericFromTryParse(IsNotNum));    // False
      Console.WriteLine(IsNumericFromTryParse(IsFloat));    // True
      Console.WriteLine(IsNumericFromTryParse(IsExp));    // False
        }
    public static bool IsNumericFromTryParse(string str)
    {
      double result = 0;
      return (double.TryParse(str, System.Globalization.NumberStyles.Float, System.Globalization.NumberFormatInfo.CurrentInfo, out result));
    }
}

Converting Fahrenheit to Celsius

Posted on by coder 

   
 

using System;
using System.Data;
using System.Text.RegularExpressions;

class Class1{
        static void Main(string[] args){
            Console.WriteLine(FtoC(0));      
            Console.WriteLine(FtoC(40));      
            Console.WriteLine(FtoC(50));      
            Console.WriteLine(FtoC(-50));
        }
    public static double FtoC(double fahrenheit)
    {
      return ((0.5/0.9) * (fahrenheit - 32));
    }
}

Converting Celsius to Fahrenheit

Posted on by coder 

   
 
using System;
using System.Data;
using System.Text.RegularExpressions;

class Class1{
        static void Main(string[] args){
            Console.WriteLine(CtoF(0));      
            Console.WriteLine(CtoF(40));      
            Console.WriteLine(CtoF(50));      
            Console.WriteLine(CtoF(-50));
        }
    public static double CtoF(double celsius)
    {
      return (((0.9/0.5) * celsius) + 32);
    }
}

Faster way to get number from string

Posted on by coder 

   
 

using System;
using System.Data;
using System.Text.RegularExpressions;

class Class1{
        static void Main(string[] args){
      string IsNotNum = "111west";
      string IsNum = "  +111  ";
      string IsFloat = "  23.11  ";
      string IsExp = "  +23 e+11  ";
      
      Console.WriteLine(GetNumberFromStrFaster(IsNum));    // +111
      Console.WriteLine(GetNumberFromStrFaster(IsNotNum));  // 
      Console.WriteLine(GetNumberFromStrFaster(IsFloat));    // 23.11
      Console.WriteLine(GetNumberFromStrFaster(IsExp));    // 
        }
    public static string GetNumberFromStrFaster(string str)
    {
      str = str.Trim();
      Match m = new Regex(@"^[+-]?d*.?[Ee]?[+-]?d*$", RegexOptions.Compiled).Match(str);
      return (m.Value);
    }

}

Use regular expression to get number from string

Posted on by coder 

   
 
using System;
using System.Data;
using System.Text.RegularExpressions;

class Class1{
        static void Main(string[] args){
      string IsNotNum = "111west";
      string IsNum = "  +111  ";
      string IsFloat = "  23.11  ";
      string IsExp = "  +23 e+11  ";
      
      Console.WriteLine(GetNumberFromStr(IsNum));    // +111
      Console.WriteLine(GetNumberFromStr(IsNotNum));  // 
      Console.WriteLine(GetNumberFromStr(IsFloat));  // 23.11
      Console.WriteLine(GetNumberFromStr(IsExp));    // 
        }
    public static string GetNumberFromStr(string str)
    {
      str = str.Trim();
      Match m = Regex.Match(str, @"^[+-]?d*.?[Ee]?[+-]?d*$");
      return (m.Value);
    }
    
}