Cant get 2 analog input readouts correctly

[jwut]

@GolamMostafa

@jwut

pinMode(A3, INPUT_PULLUP); // sensor 0

The following diagram (Fig-1) will help you to understand that it is not possible (and also no need) to connect internal-pull-up resistor (Rip) when using A3-line (A4) as an analog channel for the internal ADC.

Moreover, while executing this code: ananlogRead(A3), the A3-line is automatically configured as an input line; therefore, you also don't need to include this line : pinMode(A3, INPUT_PULLUP) in the sketch. The similar argument also applies for A4-line.

Figure-1:

I think this is the solution besides correcting pointer-related problem and deleting those lines gave me correct readouts. Thank you all for commitment