Hi, can someone help me build a kwh calculator and converter in c++ .

My city has 15.59cents killawatt per hour. Here is what Im looking for down below.

The main menu has 4 options

Main menu

1.Convert kWh 15.59c to your appliance. Enter Killawatts (I enter 3kwh and it tells me that 3 = 46.77cents.)

2.Convert watts to killawatt.

1000 Watts = 1 killawatt.

So I enter enter how many watts & it converts it to killawatt

3.Convert watts to BTU

https://www.rapidtables.com/convert/power/Watt_to_BTU.html#calculator

4.Enter up to 15 appliances and write there kwh next to them and it tells you the total killawatt per hour (kwh) for all appliances

If you have any other ideas to make it better please feel free to apply them. I have g++ and want this to run on cmd.