How to write a binary integer to binary file | c [closed]

by

Seems that you want to convert a binary to decimal:

#include <stdio.h>

int main(void)
{
    unsigned char c = 0;
    int x = 10101011;
    int rem, i;

    for (i = 0; i < 8; i++) {
        rem = x % 10;
        if (rem == 1) {
            c |= 1U << i;
        }
        x /= 10;
    }
    printf("0x%x\n", c);
    return 0;
}

Output:

0xab

Note that you can’t use more than 8 digits for x

More Related Contents:

  1. Unsuccessful fread() of int stored in binary file, segmentation fault [closed]
  2. C write in the middle of a binary file without overwriting any existing content
  3. Why does ‘fopen’ return a NULL pointer?
  4. how to get hexdump of a structure data
  5. Writing and reading (fwrite – fread) structures with pointers
  6. 2GB limit on file size when using fwrite in C?
  7. ‘ ‘, ‘\n’ , scanf() and output screen
  8. error C2143: syntax error : missing ‘;’ before ‘type’ [closed]
  9. C store digit and spaces in char array [closed]
  10. warning: suggest parentheses around assignment used as truth value [closed]
  11. How should character arrays be used as strings?
  12. C non-blocking keyboard input
  13. How can I get the size of an array from a pointer in C?
  14. Find most significant bit (left-most) that is set in a bit array
  15. How can I compare strings in C using a `switch` statement?
  16. Reading the whole text file into a char array in C
  17. bit shifting with unsigned long type produces wrong results
  18. Grabbing output from exec
  19. Tell gcc to specifically unroll a loop
  20. Writing binary number system in C code [duplicate]
  21. How do you implement a circular buffer in C?
  22. Linux: is there a read or recv from socket with timeout?
  23. How to call MATLAB code from C?
  24. Difference between scanf(“%c”, &c) and scanf(” %c”, &c) [duplicate]
  25. Is there a good reason for always enclosing a define in parentheses in C?
  26. What is the difference between getch() and getchar()?
  27. Read and write to binary files in C?
  28. Why does scanf() need & operator (address-of) in some cases, and not others? [duplicate]
  29. How to print the name of the symbols of ELF files like the nm?
  30. What are the most common naming conventions in C?

Leave a Comment