Get an int-address of void*/LPVOID?

I'm writing a DLL that I'm going to "inject" into a process. I'm awful with C++, but I've tried to do as much research as possible before giving up and asking for help. Being inside a DLL in a program without viewable output, I can't use cout/printf and their formatting, and running the program under a debugger isn't an option. I have a void pointer to an important address in memory, and I need to see what the address is. What are my options? Thanks in advance.