[Tự học C++] Tổng hợp các bài tập về File và Hệ thống bạn nên biết khi học C/C++(Full đáp án hay nhất)

1. Xóa 1 file dùng Remove

/**
* Cafedev.vn - Kênh thông tin IT hàng đầu Việt Nam
*
* @author cafedevn
* Contact: cafedevn@gmail.com
* Fanpage: https://www.facebook.com/cafedevn
* Instagram: https://instagram.com/cafedevn
* Twitter: https://twitter.com/CafedeVn
* Linkedin: https://www.linkedin.com/in/cafe-dev-407054199/
*/
 
#include <stdio.h>
     
    int main()
    {
    remove("d:/urls1.dat");
     
    return 0;
    }

2. Xóa 1 File dùng Unlink

/**
* Cafedev.vn - Kênh thông tin IT hàng đầu Việt Nam
*
* @author cafedevn
* Contact: cafedevn@gmail.com
* Fanpage: https://www.facebook.com/cafedevn
* Instagram: https://instagram.com/cafedevn
* Twitter: https://twitter.com/CafedeVn
* Linkedin: https://www.linkedin.com/in/cafe-dev-407054199/
*/
   
 #include <stdio.h>
     
    int main()
    {
    remove("C:/pete.txt");
     
    return 0;
    }

3. Cho biết thông tin FAT

/**
* Cafedev.vn - Kênh thông tin IT hàng đầu Việt Nam
*
* @author cafedevn
* Contact: cafedevn@gmail.com
* Fanpage: https://www.facebook.com/cafedevn
* Instagram: https://instagram.com/cafedevn
* Twitter: https://twitter.com/CafedeVn
* Linkedin: https://www.linkedin.com/in/cafe-dev-407054199/
*/

    
    #include <stdio.h>
    #include <dos.h>
     
    void main(void)
    {
    struct fatinfo fat;
     
    getfatd(&fat);
     
    printf("Sectors per cluster %d\n", fat.fi_sclus);
    printf("Clusters per disk %u\n", fat.fi_nclus);
    printf("Bytes per cluster %d\n", fat.fi_bysec);
    printf("Disk type %x\n", fat.fi_fatid & 0xFF);
    }

4. Đếm tần suất 1 kí tự trong 1 file

5. Đọc nội dung 1 file

/**
* Cafedev.vn - Kênh thông tin IT hàng đầu Việt Nam
*
* @author cafedevn
* Contact: cafedevn@gmail.com
* Fanpage: https://www.facebook.com/cafedevn
* Instagram: https://instagram.com/cafedevn
* Twitter: https://twitter.com/CafedeVn
* Linkedin: https://www.linkedin.com/in/cafe-dev-407054199/
*/

    
    #include <stdio.h>
     
    void main(void)
    {
    FILE *fp;
    char ch;
     
    fp = fopen("websites.txt","r");
    ch = getc(fp);
    while(ch!=EOF)
    {
    putchar(ch);
    ch = getc(fp);
    }
    printf("\n\n");
    }

6. Chọn ổ đĩa trong DOS

    /**
* Cafedev.vn - Kênh thông tin IT hàng đầu Việt Nam
*
* @author cafedevn
* Contact: cafedevn@gmail.com
* Fanpage: https://www.facebook.com/cafedevn
* Instagram: https://instagram.com/cafedevn
* Twitter: https://twitter.com/CafedeVn
* Linkedin: https://www.linkedin.com/in/cafe-dev-407054199/
*/

    #include <stdio.h>
    #include <dir.h>
     
    void main(void)
    {
    int drives;
     
    drives = setdisk(3);
    printf("The number of available drives is %d\n", drives);
    }

7. Chọn ổ đĩa trong WINS

8. Cho biết kích thước 1 file

   /**
* Cafedev.vn - Kênh thông tin IT hàng đầu Việt Nam
*
* @author cafedevn
* Contact: cafedevn@gmail.com
* Fanpage: https://www.facebook.com/cafedevn
* Instagram: https://instagram.com/cafedevn
* Twitter: https://twitter.com/CafedeVn
* Linkedin: https://www.linkedin.com/in/cafe-dev-407054199/
*/


    #include <stdio.h>
    #include <io.h>
    #include <fcntl.h>
    #include <sys\stat.h>
     
    int main()
    {
    int fp;
     
    long file_size;
     
    if ((fp = open("f:/cprojects/urls.txt", O_RDONLY)) == -1)
    printf("Error opening the file \n");
    else
    {
    file_size = filelength(file_handle);
    printf("The file size in bytes is %ld\n", file_size);
    close(fp);
    }
    return 0;
    }