Question

How do i write the following function with cout? My main purpose is to actually print all the values to a file after i know how to use it with cout. std::hex does not work!

void print_hex(unsigned char *bs, unsigned int n)
{
    int i;
    for (i = 0; i < n; i++)
    {
        printf("%02x", bs[i]);
        //Below does not work
        //std::cout << std::hex << bs[i];
    }

}

---

edit:

cout print out values such as : r9{èZ[¶ôÃ

Answer 1

I think adding a cast to int will do what you want:

#include <iostream>
#include <iomanip>

void print_hex(unsigned char *bs, unsigned int n)
{
    int i;
    for (i = 0; i < n; i++)
    {
        std::cout << std::hex << static_cast<int>(bs[i]);
    }

}

int main() {
  unsigned char bytes[] = {0,1,2,3,4,5};
  print_hex(bytes, sizeof bytes);
}

This is needed to force it to print as a number, not a character which is what you were seeing.