using System;
namespace Calculatelnterst
{
class Program
{
static void Main()
{
Console.Write("Enter principal: ");
string sPrincipal = Console.ReadLine();
decimal mPrincipal = Convert.ToDecimal(sPrincipal);
if (mPrincipal < 0)
{
Console.WriteLine("Principal cannot be negative");
mPrincipal = 0;
}
Console.Write("Enter interest");
string slnterest = Console.ReadLine();
decimal mlnterest = Convert.ToDecimal(slnterest);
if (mPrincipal < 0)
{
Console.WriteLine("Principal cannot be negative");
mPrincipal = 0;
}
decimal mlnterestPaid;
mlnterestPaid = mPrincipal * (mlnterest / 100);
decimal mTotal = mPrincipal + mlnterestPaid;
Console.WriteLine();
Console.WriteLine("Principal = " + mPrincipal);
Console.WriteLine("Interest = " + mlnterest + "%");
Console.WriteLine();
Console.WriteLine("lnterest paid = " + mlnterestPaid);
Console.WriteLine("Total = " + mTotal);
Console.WriteLine("Press Enter to terminate...");
Console.Read();
}
}
}
โปรแกรมที่ 5.13
using System;
namespace CalculatelnterestTableMoreForgiving
{
class Program
{
static void Main(string[] args)
{
int nMaximumlnterest = 50; //กำหนดค่าดอกเบี้ยสูงสุด
decimal mPrincipal;
while (true) //วนลูปปรับเงินต้นที่มีค่าเป็นบวก
{
Console.WriteLine("Enter principal : ");
string sPrincipal = Console.ReadLine();
mPrincipal = Convert.ToDecimal(sPrincipal);
if (mPrincipal >= 0)
{
break; //ถ้าหากมีค่าเป็นบวกออกมาจากวนลูป
}
Console.WriteLine("Principal cannot be negatine");
Console.WriteLine("Try agian");
Console.WriteLine();
}
decimal mlnterest;
while (true) //วนลูปปรับอัตราดอกเบี้ยที่มีค่าเป็นบวกและไม่เกินค่าสูงสุด
{
Console.Write("Enter interest");
string slnterest = Console.ReadLine();
mlnterest = Convert.ToDecimal(slnterest);
if (mlnterest > 0 && mlnterest <= nMaximumlnterest)
{
break; //ถ้าหากมีค่าเป็นบวกและน้อยกว่าค่าสูงสุดจะออกจากลูป
}
Console.WriteLine("lnterest cannot be negative" +
"or greater than " + nMaximumlnterest);
Console.WriteLine("Try again");
Console.WriteLine();
}
Console.Write("Enter number of year: ");
string sDuration = Console.ReadLine();
int nDuration = Convert.ToInt32(sDuration);
Console.WriteLine();
Console.WriteLine("Principal = " + mPrincipal);
Console.WriteLine("lnterest = " + mlnterest + "%");
Console.WriteLine("Duration = " + nDuration + "year");
Console.WriteLine();
int nYear = 1;
while (nYear <= nDuration)
{
decimal mlnterestPaid;
mlnterestPaid = mPrincipal * (mlnterest / 100);
mPrincipal = mPrincipal + mlnterestPaid;
mPrincipal = decimal.Round(mPrincipal, 2);
Console.WriteLine(nYear + " - " + mPrincipal);
nYear = nYear + 1;
}
Console.WriteLine("Prees Enter to terminate...");
Console.Read();
}
}
}
โปรแกรมที่7.7
using System;
namespace studentname
{
class student
{
private int idNumber;
private string lastName;
private double gradePointAversge;
public int getld()
{
return idNumber;
}
public string getName()
{
return lastName;
}
public double getGPA()
{
return gradePointAversge;
}
public void setLd(int id)
{
idNumber = id;
}
public void setName(string name)
{
lastName = name;
}
public void setGPA(double gpa)
{
gradePointAversge = gpa;
}
class Program
{
static void Main()
{
student st = new student();
st.setLd(9353);
st.setName("Teerawat");
st.setGPA(3.98);
Console.WriteLine("Student name {0} has ID # {1} and gpa of{2}",
st.getName(), st.getld(), st.getGPA());
Console.ReadLine();
}
}
}
}
โปรแกรมที่8.6
using System;
namespace UserPredefineMethods
{
static class Program
{
static void Main ()
{
double[] waterDepht = { 45, 19, 2, 16.8, 190, 0.8, 510, 6, 18 };
string outputMsg = "";
string caption = "System.Array Methods IIIustrated";
double[] w = new double[20];
outputMsg += "waterDepth Array\n\n";
foreach (double wVal in waterDepht)
outputMsg += wVal + "\n";
MessageBox.Show(outputMsg, caption);
Array.Copy(waterDepht, 2, w, 0, 5);
Array.Sort(w);
outputMsg = "Array w Sorted\n\n";
foreach (double wVal in w)
{
if (wVal > 0)
outputMsg += wVal + "\n";
}
MessageBox.Show(outputMsg, caption);
Array.Reverse(w);
outputMsg = "Array w Reversed\n\n";
foreach (double wVal in w)
{
if (wVal > 0)
outputMsg += wVal + "\n";
}
MessageBox.Show(outputMsg, caption);
}
}
}
