Conversion from Byte to ASCII in C

Question

Can anyone suggest means of converting a byte array to ASCII in C? Or converting byte array to hex and then to ASCII?

[04/02][Edited]: To rephrase it, I wish to convert bytes to hex and store the converted hex values in a data structure. How should go about it?

Regards, darkie

Answer 1

Well, if you interpret an integer as a char in C, you'll get that ASCII character, as long as it's in range.

int i = 97;
char c = i;

printf("The character of %d is %c\n", i, c);

Prints:

The character of 97 is a

Note that no error checking is done - I assume 0 <= i < 128 (ASCII range).

Otherwise, an array of byte values can be directly interpreted as an ASCII string:

char bytes[] = {97, 98, 99, 100, 101, 0};

printf("The string: %s\n", bytes);

Prints:

The string: abcde

Note the last byte: 0, it's required to terminate the string properly. You can use bytes as any other C string, copy from it, append it to other strings, traverse it, print it, etc.