module ac_con(output heater_on,cooler_on,fan_on, input temp_low,emp_high,auto_temp,manual_heat,manual_cool,manual_fan);
assign heater_on=(temp_low & auto_temp) | manual_heat;
assign cooler_on=(temp_high & auto_temp) | manual_cool;
assign fan_on=(heater-on | cooler_on | manual_fan;
endmodule