医疗费用（1）
#include <iostream>
using namespace std;
int main ()
{ float x;
cout<<"实际医疗费：";
cin>>x;
if (x<2000) x=0.15*x;
if (x>=2000&&x<4000) x=0.1*x;
if (x>=4000&&x<6000) x=0.08*x;
if (x>=6000) x=0.05*x;
cout<<"应收取医疗费："<<x<<endl;
return 0;
}
（2）
#include <iostream>
using namespace std;
int main ()
{ float x;
int c;
cout<<"实际医疗费："<<endl;
cin>>x;
c=x/1000;
switch(c)
{
case 0:case 1:x=0.15*x;break;
case 2:case 3:x=0.1*x;break;
case 4:case 5:x=0.08*x;break;
default:x=0.05*x;break;
}
cout<<"应收取医疗费："<<x<<endl;
return 0;
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO ;
namespace Chapter7Date515
{
class Program
{
public void writedata()
{
FileStream fs = new FileStream("E:\\a.txt", FileMode.Create, FileAccess.Write);
StreamWriter sw = new StreamWriter(fs);
sw.WriteLine("JJJesse;27;123");
sw.WriteLine("Pinkman;30;234");
sw.WriteLine("Hesinberg;55;789");
sw.Flush();
sw.Close();
fs.Close();
}
public void addetails()
{
FileStream fs = new FileStream("E:\\a.txt", FileMode.Append , FileAccess.Write);
StreamWriter sw = new StreamWriter(fs);
Console.WriteLine("please write the information ");
string s = Console.ReadLine();
sw.WriteLine(s);
sw.Flush();
sw.Close();
fs.Close();
}
public void searchdata(string find)
{
FileStream fs = new FileStream("E:\\a.txt", FileMode.Open, FileAccess.Read);
StreamReader sr = new StreamReader(fs);
sr.BaseStream.Seek(2, SeekOrigin.Begin);
string s = sr.ReadLine();
string[] ss;
while (s != null)
{
ss = s.Split(';');
if (ss[0] == find)
{
Console.WriteLine("The name is: {0}", ss[0]);
Console.WriteLine("The age is: {0}", ss[1]);
Console.WriteLine("The tellphone no is: {0}", ss[2]);
}
s = sr.ReadLine();
}
sr.Close();
fs.Close();
}
public void readdata()
{
FileStream fs = new FileStream("E:\\a.txt", FileMode.Open , FileAccess.Read );
StreamReader sr = new StreamReader(fs);
sr.BaseStream.Seek(2, SeekOrigin.Begin);
string s = sr.ReadLine ();
string[] ss;
while (s != null)
{
ss = s.Split(';');
Console.WriteLine("The name is: {0}" , ss[0]);
Console.WriteLine("The age is: {0}" , ss[1]);
Console.WriteLine("The tellphone no is: {0}" , ss[2]);
s = sr.ReadLine();
}
sr.Close();
fs.Close();
}
public void filehandle(Program p)
{
string ch = "Y";
Console.WriteLine("Do you want to 1:search the data 2:display all details 3:add data");
int i = Convert.ToInt32(Console.ReadLine());
switch (i)
{
case 1: Console.WriteLine("Search:"); p.searchdata(Console.ReadLine()); break;
case 2: p.readdata(); break;
case 3: p.addetails(); break;
}
Console.WriteLine("Do you want to continue ?Y/N");
ch = Console.ReadLine().ToUpper();
if (ch=="Y") filehandle (p);
}
static void Main(string[] args)
{
Program p = new Program();
p.writedata();
p.filehandle(p);
}
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace _6_20OverloadingAnOperator
{
class Distance
{
internal int Length;
public Distance (){Length=0;}
public Distance(int l) { Length = l; }
public static bool operator <(Distance d1,Distance d2)
{
return d1.Length < d2.Length;
}
public static bool operator >(Distance d1, Distance d2)
{
return d1.Length > d2.Length;
}
public Distance Max(Distance d1,Distance d2)
{
if (d1 < d2) return d2;
else return d1;
}
public static Distance operator &(Distance d1,Distance d2)
{
return d1.Length>d2.Length?d1:d2;
}
public static Distance operator +(Distance d1,int value)
{
d1.Length += value ;
return d1;
}
public void DisplayDistance(Distance d1,int Length)
{
Distance Result;
Console.WriteLine("The distance of travel is{0}",d1 .Length );
Console.WriteLine("The distance to reach the destination is{0}",Length);
Result = d1 + Length;
Console.WriteLine("The total distant you need to travel is {0}", Result.Length);
}
}
class EntryPoint
{
static void Main(string[] args)
{
Distance d1 = new Distance(15);
Distance d2 = new Distance(12);
Distance d3 = d1 & d2;
d3.DisplayDistance(d3,0);
// string Location;
// int TravelledDistance;
// Console.WriteLine("Enter the Location you have reached :A,B,C");
// Location = Console.ReadLine().ToUpper();
// if (Location == "A" || Location == "B" || Location == "C")
// {
// Console.WriteLine("Enter the distance you have covered:");
// TravelledDistance = Convert.ToInt32(Console.ReadLine());
// d2.Length = TravelledDistance;
// switch (Location)
// {
// case "A":
// d1.DisplayDistance (d2,15);break;
// case "B":
// d1.DisplayDistance(d2, 20); break;
// case "C":
// d1.DisplayDistance(d2, 25); break;
// default :Console .WriteLine ("The Location cannot be found");
// break;
// }
// }
// else Console.WriteLine ("Incorrect value");
//Console.ReadLine ();
}
}
}