Converting an int to a 2 byte hex value in C

Question

I need to convert an int to a 2 byte hex value to store in a char array, in C. How can I do this?

Answer 1

char s[5];  // 4 chars + '\0'
int x = 4660;
sprintf(s, "%04X", x);

You'll probably want to check sprintf() documentation. Be careful that this code is not very safe. If x is larger than 0xFFFF, the final string will have more than 4 characters and won't fit. In order to make it safer, look at snprintf().