Raqamli texnologiyalar fakulteti dasturiy injiniring yo’nalishi

#include
#include
using namespace std;
int main( )


{
int n1, n2;
ifstream drag("drag.txt", ios::in|ios::binary);
n1 = drag. tellg();
drag.seekg (0, ios::end);
n2 = drag.tellg();
cout<<"Fayl hajmi: " << n2 - n1 << endl;


return 0;
}
Natija:

Fayl hajmi: 58

Binar fayllar. Binar fayllardan o’qish va binar faylga yozish uchun istream::read() va ostream: :write() usullaridan foydalaniladi.

Quyidagi dasturda shu usullardan foydalanib "drag.txt" faylidan, "drag2.txt" fayliga nusxa olinadi.

#include
#include
using namespace std;
int rnain( void )
{
char buffer;
int index = 0;


//fayllar nomlari
const char filename1[] = "drag.txt";
const char filename2[] = "drag2.txt";
//fayllarni ochish
fstream file1(filename1, ios::in);
ifstream file2(filename2, ios::out);


//ko’rsatkich fayl boshiga
file1.seekg(0, ios::beg);
file2.seekp(0, ios::beg);
//birinchi simvolni o’qish
file1.read(&buffer, 1);
//qolgan simvollarni yozish


while(file1.good() && file2.good())
{
file2.write(&buffer, 1);
index++;
file1.seekp(index);
file2.seekg(index);


file1.read(&buffer, 1);
};
//fayllarni yopish
file1.close();
file2.close();
return 0;
}

Hosil qilingan fayl "drag2.txt" mazmuni bo’yicha "drag.txt" faylidan farq qilmaydi.