using System;
namespace Hello
{
class Program
{
static void Main()
{
Console.WriteLine("Hello , World ");
Console.WriteLine("Computer Programing");
Console.WriteLine("Praphai Saylam");
Console.ReadLine();
}
}
}
Test 2
using System;
namespace DemoEscapeSequences{
class Program {
static void Main() {
Console.WriteLine("This line \tcontains two \ttabs");
Console.WriteLine("This statement\ncontains a new line");
Console.WriteLine("This statement sound three alerts\a\a\a");
Console.ReadLine();
}
}
}
4.1โปรแกรมการแสดงค่าสูงสุดต่ำสุดของเลขจำนวนเต็ม
using System;
namespace IntegerRange
{
class Program
{
static void Main()
{
Console.WriteLine("min sbyte = " + SByte.MinValue);
Console.WriteLine("max sbyte = " + SByte.MaxValue);
Console.WriteLine("min byte = " + Byte.MinValue);
Console.WriteLine("min byte = " + Byte.MaxValue);
Console.WriteLine("min short = " + Int16.MinValue);
Console.WriteLine("max short = " + Int16.MaxValue);
Console.WriteLine("min ushort = " + UInt16.MinValue);
Console.WriteLine("max ushort = " + UInt16.MaxValue);
Console.WriteLine("min int = " + Int32.MinValue);
Console.WriteLine("max int = " + Int32.MaxValue);
Console.WriteLine("min uint = " + UInt32.MinValue);
Console.WriteLine("max uint = " + UInt32.MaxValue);
Console.WriteLine("min long = " + Int64.MinValue);
Console.WriteLine("max long = " + Int64.MaxValue);
Console.WriteLine("min ulong = " + UInt64.MinValue);
Console.WriteLine("max ulong = " + UInt64.MaxValue);
Console.ReadLine();
}
}
}
4.2 ตัวอย่างการนำตัวแปรมาแสดงผล
namespace DisplaySomeMoney {
class Program {
static void Main() {
double someMoney = 39.45;
Console.Write("The money is ");
Console.WriteLine(someMoney);
double someMoney1= 39.46;
Console.Write("The money is ");
Console.WriteLine(someMoney1);
double someMoney2= 39.47;
Console.Write("The money is ");
Console.WriteLine(someMoney2);
double someMoney3= 39.48;
Console.Write("The money is ");
Console.WriteLine(someMoney3);
double someMoney4= 39.49;
Console.Write("The money is ");
Console.WriteLine(someMoney4);
double someMoney5= 39.50;
Console.Write("The money is ");
Console.WriteLine(someMoney5);
Console.ReadLine();
}
}
}
4.4 ตัวอย่างการใช้ตัวดำเนินการเปรียบเที่ยบกับตัวแปรที่เก็บตัวเลข
using System;
namespace Relation {
class Program
{
static void Main(string[] args)
{
int x = 17;
int y = 5;
Console.WriteLine("{0} == {1} = {2}", x, y, x == y);
Console.WriteLine("{0} != {1} = {2}", x, y, x != y);
Console.WriteLine("{0} < {1} = {2}", x, y, x < y);
Console.WriteLine("{0} <= {1} = {2}", x, y, x <= y);
Console.WriteLine("{0} > {1} = {2}", x, y, x > y);
Console.WriteLine("{0} >= {1} = {2}", x, y, x >= y);
Console.ReadLine();
}
}
}
4.5จะนำตัวดำเนินการแบบ short-circuit มาใช้
using System;
namespace ShortCircuit {
class Program
{
static void Main(string[] args)
{
int x = 4;
int y = 5;
Console.WriteLine("x = {0},y = {1}", x, y);
bool result = true || (++x == y);
Console.WriteLine("result = {0}", result);
Console.WriteLine("x = {0},y = {1}", x, y);
result = true && (++x == y);
Console.WriteLine("resule = {0}", result);
Console.WriteLine("x = {0},y = {1}", x, y);
Console.ReadLine();
}
}
}
