Using System. Io; namespace File 1 { class Program { public

using System;
using System.IO;

namespace File_37
{
class Program
{
public static void Main(string[] args)
{
string s,s1;char [] m={' ',';'};
Console.Write("Mavjud fayl nomini kiriting: ");
s=Console.ReadLine();
StreamReader b=File.OpenText(@"d:\"+s);
s1=b.ReadToEnd();b.Close();
string [] a=s1.Split(m,StringSplitOptions.RemoveEmptyEntries);
for (int i=a.Length-1;i>=0;i--) 
File.AppendAllText(@"d:\"+s," "+a[i]+" ");
Console.ReadKey(true);
}
}
}
File 38. Butun sonlar fayli berilgan. Uning juft nomerli elementlarini faylga qayta yozish dasturi tuzilsin.
Dasturning C# dagi ko’rinishi:
using System;
using System.IO;

namespace File_38
{
class Program
{
public static void Main(string[] args)
{
string s,s1;char [] m={' ',';'};
Console.Write("Mavjud fayl nomini kiriting: ");
s=Console.ReadLine();
StreamReader b=File.OpenText(@"d:\"+s);
s1=b.ReadToEnd();b.Close();
string [] a=s1.Split(m,StringSplitOptions.RemoveEmptyEntries);
for (int i=0;iFile.AppendAllText(@"d:\"+s," "+a[i]+" ");
Console.ReadKey(true);
}
}
}
File 39. Butun sonlar fayli berilgan. Uning barcha 5-10 diapozonga tegishli bo’lgan elementlarini qayta yozish dasturi tuzilsin.
Dasturning C# dagi ko’rinishi:
using System;
using System.IO;

namespace File_39
{
class Program
{
public static void Main(string[] args)
{
string s,s1;char [] m={' ',';'};int i,n;
Console.Write("Mavjud fayl nomini kiriting: ");
s=Console.ReadLine();
StreamReader b=File.OpenText(@"d:\"+s);
s1=b.ReadToEnd();b.Close();
string [] a=s1.Split(m,StringSplitOptions.RemoveEmptyEntries);
for (i=0;i{
n=Convert.ToInt32(a[i]);
if (n>=5&n<=10) File.AppendAllText(@"d:\"+s," "+a[i]+" ");
}
Console.ReadKey(true);
}
}
}
File 40. Butun sonlar fayli berilgan. Undagi har bir juft nomerli elementni 2 ta nolga almashtirish dasturi tuzilsin.
Dasturning C# dagi ko’rinishi:
using System;
using System.IO;

namespace File_40
{
class Program
{
public static void Main(string[] args)
{
string s,s1;char [] m={' ',';'};int i,n;
Console.Write("Mavjud fayl nomini kiriting: ");
s=Console.ReadLine();
StreamReader b=File.OpenText(@"d:\"+s);
s1=b.ReadToEnd();b.Close();
File.WriteAllText(@"d:\"+s,"");
string [] a=s1.Split(m,StringSplitOptions.RemoveEmptyEntries);
for (i=0;i{
if (i%2==0) File.AppendAllText(@"d:\"+s,"0 0 ");
else File.AppendAllText(@"d:\"+s,a[i]+" ");
}
Console.ReadKey(true);
}
}
}
File 41. Butun sonlar fayli berilgan. Undagi har bir musbat elementni 3 ta nolga almashtirish dasturi tuzilsin.
Dasturning C# dagi ko’rinishi:
using System;
using System.IO;

namespace File_41
{
class Program
{
public static void Main(string[] args)
{
string s,s1;char [] m={' ',';'};int i,n;
Console.Write("Mavjud fayl nomini kiriting: ");
s=Console.ReadLine();
StreamReader b=File.OpenText(@"d:\"+s);
s1=b.ReadToEnd();b.Close();
File.WriteAllText(@"d:\"+s,"");
string [] a=s1.Split(m,StringSplitOptions.RemoveEmptyEntries);
for (i=0;i{
n=Convert.ToInt32(a[i]);
if (n>0) File.AppendAllText(@"d:\"+s,"0 0 0 ");
else File.AppendAllText(@"d:\"+s,a[i]+" ");
}
Console.ReadKey(true);
}
}
}
File 42. Ixtiyoriy tipli 2 ta fayl berilgan. Fayllar ichidagi ma’lumotlarni almashtirish dasturi tuzilsin.
Dasturning C# dagi ko’rinishi:
using System;
using System.IO;

namespace File_42
{
class Program
{
public static void Main(string[] args)
{
string s,s1,s2,S;
Console.Write("1-fayl nomini kiriting: ");
s1=Console.ReadLine();
Console.Write("2-fayl nomini kiriting: ");
s2=Console.ReadLine();
StreamReader b=File.OpenText(@"d:\"+s1);
s=b.ReadToEnd();b.Close();
StreamReader a=File.OpenText(@"d:\"+s2);
S=a.ReadToEnd();a.Close();
File.WriteAllText(@"d:\"+s1,S);File.WriteAllText(@"d:\"+s2,s);
Console.ReadKey(true);
}
}
}
File 43. Ixtiyoriy tipli 2 ta fayl berilgan. Fayllar ichidagi ma’lumotlarni almashtirish dasturi tuzilsin.
Dasturning C# dagi ko’rinishi:
using System;
using System.IO;

namespace File_43
{
class Program
{
public static void Main(string[] args)
{
string s,s1;
Console.Write("Mavjud fayl nomini kiriting: ");
s=Console.ReadLine();
Console.Write("Yangi fayl nomini kiriting: ");
s1=Console.ReadLine();
File.Copy(@"d:\"+s,@"d:\"+s1);
Console.ReadKey(true);
}
}
}
File 44. 3 ta bir xil tipli, lekin har xil razmerli fayllar berilgan. Uzunligi eng katta bo’lga faylni uzunligi eng kichik bo’lgan faylga almashtirish dasturi tuzilsin.
Dasturning C# dagi ko’rinishi:
using System;
using System.IO;

namespace File_44
{
class Program
{
public static void Main(string[] args)
{
string s1,s2,s3,d,f,h;
Console.Write("1-fayl nomini kiriting: ");
s1=Console.ReadLine();
Console.Write("2-fayl nomini kiriting: ");
s2=Console.ReadLine();
Console.Write("2-fayl nomini kiriting: ");
s3=Console.ReadLine();
StreamReader b=File.OpenText(@"d:\"+s1);
d=b.ReadToEnd();b.Close();
StreamReader a=File.OpenText(@"d:\"+s2);
f=a.ReadToEnd();a.Close();
StreamReader c=File.OpenText(@"d:\"+s1);
h=c.ReadToEnd();c.Close();
if (d.Length>f.Length)
{
if (f.Length>h.Length) File.WriteAllText(@"d:\"+s1,h);
else if (d.Length>h.Length) File.WriteAllText(@"d:\"+s1,f);
else File.WriteAllText(@"d:\"+s3,f);
}
else 
{
if (d.Length>h.Length)File.WriteAllText(@"d:\"+s2,h);
else if (f.Length>h.Length)File.WriteAllText(@"d:\"+s2,d);
else File.WriteAllText(@"d:\"+s3,d);
}
Console.ReadKey(true);
}
}
}
File 45. 3 ta bir xil tipli, lekin har xil razmerli fayllar berilgan. Uzunligi eng kichik bo’lga faylni uzunligi eng katta bo’lgan faylga almashtirish dasturi tuzilsin.
Dasturning C# dagi ko’rinishi:
using System;
using System.IO;

namespace File_45
{
class Program
{
public static void Main(string[] args)
{
string s1,s2,s3,d,f,h;
Console.Write("1-fayl nomini kiriting: ");
s1=Console.ReadLine();
Console.Write("2-fayl nomini kiriting: ");
s2=Console.ReadLine();
Console.Write("2-fayl nomini kiriting: ");
s3=Console.ReadLine();
StreamReader b=File.OpenText(@"d:\"+s1);
d=b.ReadToEnd();b.Close();
StreamReader a=File.OpenText(@"d:\"+s2);
f=a.ReadToEnd();a.Close();
StreamReader c=File.OpenText(@"d:\"+s1);
h=c.ReadToEnd();c.Close();
if (d.Length>f.Length)
{
if (f.Length>h.Length) File.WriteAllText(@"d:\"+s3,d);
else if (d.Length>h.Length) File.WriteAllText(@"d:\"+s2,d);
else File.WriteAllText(@"d:\"+s2,h);
}
else 
{
if (d.Length>h.Length)File.WriteAllText(@"d:\"+s3,f);
else if (f.Length>h.Length)File.WriteAllText(@"d:\"+s1,f);
else File.WriteAllText(@"d:\"+s1,h);
}
Console.ReadKey(true);
}
}
}
File 46. 3 ta bir xil tipli, lekin har xil razmerli fayllar berilgan. Uzunligi eng kichik bo’lga faylni uzunligi eng katta bo’lgan faylga almashtirish dasturi tuzilsin.
Dasturning C# dagi ko’rinishi: