#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>

int main(int argc, char* argv[]) {
    //unsigned char u_ch = 0xaa;
    //unsigned char u_ch = 170;
    unsigned char u_ch = '\xaa';

    printf("u_ch == '%c'   // using %%c -- NOT USEFUL!!!\n", u_ch);
    printf("u_ch == 0x%02x   // using 0x%%02x -- GOOD\n", u_ch);
    printf("'\\xaa' == 0x%02x   // without typecast\n",
            '\xaa');
    printf("(unsigned char) '\\xaa' == 0x%02x   // using typecast\n", 
            (unsigned char) '\xaa');
    
    return EXIT_SUCCESS;
}
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