Faylga ixtiyoriy murojaat qilish

cout<

getch();

return 0;

}

• fread() funksiyasi orqali fayldan o’qish

• Misol

• Struktura turidagi massivni faylga yozish

• typedef struct
• {
• char name[4]; int age; int salary;
• } employee;
• int main()
• { int i; char file[256];
• FILE* fp;
• employee ww[3] = {{"AA",1,1},{"BB",2,2},{"CC",3,3}};
• puts("Fayl nomini kiriting:\n");
• if ((fp = fopen(file,"w")) == NULL)
• {
• printf("Faylni ochib bo'lmadi %s\n", file);
• }
• fwrite(&ww[0],sizeof(employee),3,fp);
• fclose(fp);
• }

• Misol

• N natural soni berilgan. Elementlari n ta butun sondan iborat bo’lgan faylni hosil qiluvchi va juft elementlarini 2 marta orttiruvchi dastur tuzing.

• int main(){
• int n, k, i; FILE *f;
• //binar faylni oqish va yozish uchun ochish
• f = fopen("binar", "wb+");
• if (f == NULL) {
• cout <<"Fayl hosil qilishda xatolik";
• return 1;
• }
• cout<<"n = "; cin>>n;
• for (i = 0; i < n; i++)
• {
• cin>>k; fwrite(&k, sizeof(k), 1, f);
• }
• //fayl ko'rsatkichni satr boshiga qo'yish
• rewind(f);

• Misol (davomi)

• while (!feof(f)) // fayl oxiriga bormadimi
• {
• fread(&k, sizeof(k), 1, f);
• if (k % 2 ==0)
• {
• k *= 2;
• // fayl ko'rsatkichni sizeof(int) bayt chapga surish
•