Convert C++ byte array to a C string

Question

I\'m trying to convert a byte array to a string in C but I can\'t quite figure it out.

I have an example of what works for me in C++ but I need to convert it to C.

Answer 1

C strings are null terminated, so the size of the string will be the size of the array plus one, for the null terminator. Then you could use memcpy() to copy the string, like this:

#include 
#include 
#include 

typedef unsigned char BYTE;

int main(void)
{
  BYTE byteArray[5] = { 0x48, 0x65, 0x6C, 0x6C, 0x6F };

  // +1 for the NULL terminator
  char str[sizeof(byteArray) + 1];
  // Copy contents
  memcpy(str, byteArray, sizeof(byteArray));
  // Append NULL terminator
  str[sizeof(byteArray)] = '\0';

  printf("%s\n", str);    
  return EXIT_SUCCESS;
}

Output:

Hello

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