How to make the increment function on a button in a cell that corresponds to today's date?

Question

Google Apps Script

there is a button. Added increment script by 1
function increment() {
SpreadsheetApp.getActiveSheet().getRange('C5').setValue(SpreadsheetApp.getActiveSheet().getRange('C5').getValue() + 1);
}
there is a column with dates (let's say A1-A30) . What should be added to the code so that it does not +1 cell C5, but the cell to the right of the date (B1-B30). And every new day, changes occurred in the cell corresponding to today's date.

Answer 1

1) Get the data B1:C30 (getValues)
2) Loop through them, check:
3) If the date matches, then add 1 in this line
4) Unload the received data back (setValues)