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

Dasturning C# dagi ko’rinishi:
using System;
using System.IO;

namespace File_24
{
class Program
{
public static void Main(string[] args)
{
string s,s1;char [] m={' ',','};double b,c=0;
int i,j,n=1;bool l=false,k=false;
Console.Write("Mavjud fayl nomini kiriting: ");
s=Console.ReadLine();
Console.Write("Yaratiladigan fayl nomini kiriting: ");
s1=Console.ReadLine();
string [] h=File.ReadAllLines(@"d:\"+s);
for (i=0;i{
string [] a=h[i].Split(m,StringSplitOptions.RemoveEmptyEntries);
b=Convert.ToDouble(a[0]);
if (i!=0) 
{
if (c>b|(c==b&n!=1)) {if (l){l=false;File.AppendAllText(@"d:\"+s1,n.ToString()+" ");n=1;}n++;k=true;}
if (cif (k){k=false;File.AppendAllText(@"d:\"+s1,n.ToString()+" ");n=1;}n++;l=true;}
}
for (j=0;j{
b=Convert.ToDouble(a[j]);c=Convert.ToDouble(a[j+1]);
if (cif (l){l=false;File.AppendAllText(@"d:\"+s1,n.ToString()+" ");n=1;}n++;k=true;}
if (c>b|(c==b&l)) {if (k){k=false;File.AppendAllText(@"d:\"+s1,n.ToString()+" ");n=1;}n++;l=true;}
}
if (i==h.Length)File.AppendAllText(@"d:\"+s1,n.ToString()+" ");
}
Console.ReadKey(true);
}
}
}
Natija:
File 25. Butun sonlar fayli berilgan. Undagi barcha elementlarini ularning kvadratiga almashtirish dasturi tuzilsin.
Dasturning C# dagi ko’rinishi:
using System;
using System.IO;

namespace File_25
{
class Program
{
public static void Main(string[] args)
{
string s;char [] m={' ',','};int i,j,n=1;
Console.Write("Mavjud fayl nomini kiriting: ");
s=Console.ReadLine();
string [] h=File.ReadAllLines(@"d:\"+s);
File.WriteAllText(@"d:\"+s,"");
for (i=0;i{
string [] a=h[i].Split(m,StringSplitOptions.RemoveEmptyEntries);
for (j=0;j{
n=Convert.ToInt32(a[j]);
File.AppendAllText(@"d:\"+s,(n*n).ToString()+" ");
}
string [] b={"\n"};
File.AppendAllLines(@"d:\"+s,b);
}
Console.ReadKey(true);
}
}
}
Natija:
File 26. Butun sonlar fayli berilgan. Undagi eng kichik va eng kata elementlar o’rnini almashtirish dasturi tuzilsin.
Dasturning C# dagi ko’rinishi:
using System;
using System.IO;

namespace File_25
{
class Program
{
public static void Main(string[] args)
{
string s;char [] m={' ',','};int i,j,n=1,min=0,max=0;
Console.Write("Mavjud fayl nomini kiriting: ");
s=Console.ReadLine();
string [] h=File.ReadAllLines(@"d:\"+s);
File.WriteAllText(@"d:\"+s,"");
for (i=0;i{
string [] a=h[i].Split(m,StringSplitOptions.RemoveEmptyEntries);
for (j=0;j{
n=Convert.ToInt32(a[j]);
if ((i==0&j==0)|min>n) min=n;
if ((i==0&j==0)|max}
}
for (i=0;i{
string [] a=h[i].Split(m,StringSplitOptions.RemoveEmptyEntries);
for (j=0;j{
n=Convert.ToInt32(a[j]);
if (min==n) n=max;else if (max==n) n=min;
File.AppendAllText(@"d:\"+s,n.ToString()+" ");
}
string [] b={"\n"};
File.AppendAllLines(@"d:\"+s,b);
}
Console.ReadKey(true);
}
}
}
Natija:
File 27. elementli butun sonlar fayli berilgan ( undagi elementlar soni). Uning elementlari o’rnini quyidagicha almashtirish dasturi tuzilsin.
Dasturning C# dagi ko’rinishi:
using System;
using System.IO;

namespace File_27
{
class Program
{
public static void Main(string[] args)
{
string s,s1;char [] m={' ',','};int j;
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 (j=0;j{
File.AppendAllText(@"d:\"+s,a[j]+" "+a[a.Length-1-j]+" ");
}
if (j%2==1) File.AppendAllText(@"d:\"+s,a[j/2]+" ");
Console.ReadKey(true);
}
}
}
Natija:
File 28. Haqiqiy sonlar fayli berilgan. Fayldagi birinchi va oxirgi elementdan tashqari hamma elementni uning barcha elementlari o’rta arifmetigiga almashtirish dasturi tuzilsin.
Dasturning C# dagi ko’rinishi:
using System;
using System.IO;

namespace File_28
{
class Program
{
public static void Main(string[] args)
{
string s;char [] m={' ',';'};int i,j,n=0;double S=0;
Console.Write("Mavjud fayl nomini kiriting: ");
s=Console.ReadLine();
string [] h=File.ReadAllLines(@"d:\"+s);
for (i=0;i{
string [] a=h[i].Split(m,StringSplitOptions.RemoveEmptyEntries);
for (j=0;jToDouble(a[j]);
n+=a.Length;
}
S=S/n;
for (i=0;i{
string [] a=h[i].Split(m,StringSplitOptions.RemoveEmptyEntries);
for (j=0;jif (!(i==0&j==0)&!(i==h.Length-1&j==a.Length-1))a[j]=S.ToString();
h[i]=string.Join(" ",a);
}
File.WriteAllLines(@"d:\"+s,h);
Console.ReadKey(true);
}
}
}
Natija:
File 29. Haqiqiy sonlar fayli berilgan. Fayldagi birinchi va oxirgi elementdan tashqari hamma elementni uning barcha elementlari o’rta arifmetigiga almashtirish dasturi tuzilsin.
Dasturning C# dagi ko’rinishi:
using System;
using System.IO;

namespace File_29
{
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);
if (a.Length>50) s1=String.Join(" ",a,(a.Length-50+1)/2,49);
File.WriteAllText(@"d:\"+s,s1);
Console.ReadKey(true);
}
}
}
File 30. Elementlari miqdori juft bo’lgan butun sonlar fayli berilgan. Berilgan fayl elementlaridan ikkinchi yarmini o’chirish dasturi tuzilsin.
Dasturning C# dagi ko’rinishi;
using System;
using System.IO;

namespace File_30
{
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);
s1=String.Join(" ",a,0,(a.Length+1)/2);
File.WriteAllText(@"d:\"+s,s1);
Console.ReadKey(true);
}
}
}
File 31. Elementlari miqdori 50 dan oshiq bo’lgan butun sonlar fayli berilgan. Berilgan fayl elementlarini 50 tagacha kamaytiring, dastlabki elementlarini o’chirib.
Dasturning C# dagi ko’rinishi:
using System;
using System.IO;

namespace File_31
{
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);
if (a.Length>50) s1=String.Join(" ",a,a.Length-49,49);
File.WriteAllText(@"d:\"+s,s1);
Console.ReadKey(true);
}
}
}
File 32. Elementlari juft bo’lgan butun sonlar fayli berilgan. Fayldan birinchi yarmida joylashgan elementlarini o’chirish dasturi tuzilsin.
Dasturning C# dagi ko’rinishi:
using System;
using System.IO;

namespace File_31
{
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);
s1=String.Join(" ",a,((a.Length+1)/2),a.Length/2);
File.WriteAllText(@"d:\"+s,s1);
Console.ReadKey(true);
}
}
}
File 33. Butun sonlar fayli berilgan. Undan barcha juft nomerli elementlarini o’chirish dasturi tuzilsin.
Dasturning C# dagi ko’rinishi:
using System;
using System.IO;

namespace File_33
{
class Program
{
public static void Main(string[] args)
{
string s;char [] m={' ',';'};int i,j,n=0;
Console.Write("Mavjud fayl nomini kiriting: ");
s=Console.ReadLine();
string [] b=File.ReadAllLines(@"d:\"+s);
File.WriteAllText(@"d:\"+s,"");
for (i=0;i{
string [] a=b[i].Split(m,StringSplitOptions.RemoveEmptyEntries);
for (j=1;jAppendAllText(@"d:\"+s,a[j]+" "); 
if (a.Length%2==1) n=0;
else n=1;
}
Console.ReadKey(true);
}
}
}
File 34. Butun sonlar fayli berilgan. Undan barcha manfiy sonlarni o’chirish dasturi tuzilsin.
Dasturning C# dagi ko’rinishi:
using System;
using System.IO;

namespace File_34
{
class Program
{
public static void Main(string[] args)
{
string s,s1;char [] m={' ',';'};int j;
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);