edit andcoin.conf file at c:\user\yuruser\appdata\roaming\AndCoinV2

# You must set rpcuser and rpcpassword to secure the JSON-RPC api
rpcuser=yourrpcusername
rpcpassword=yourrpcpassward

# By default, only RPC connections from localhost are allowed.  Specify
# as many rpcallowip= settings as you like to allow connections from
# other hosts (and you may use * as a wildcard character):

rpcallowip=127.0.0.1

# Listen for RPC connections on this TCP port:
port=35444
rpcport=35422

goto cpuminer-qt folder and run command on cmd

./core/minerd -o stratum+tcp://127.0.0.1:35222 -u yourrpcusername -p yourrpcpassward

after 25 april 2018 the algo swicth to a5av2, cant mine again using cpuminer. only mineable for mobile miner via pools