警告:format '%c'期望类型'int'，但参数2有类型'char *'

I'm trying to print all characters stored in hex array to the screen, one by one, but I get this strange error in line 16. As far as I know, %c should be expecting a char, not an int. Why I'm getting this error? Below is my code, thanks.I'm trying to print all characters stored in he