Why does not modulation work. Why if, for example: 5%2 output is an error , but not 5%2 = 1

Question

Чому не працює ділення по модулю.Чому якщо, наприклад: 5%2 виводиться помилка, а не 5%2=1Why does not modulation work. Why if, for example: 5%2 output is an error , but not 5%2 = 1 https://code.sololearn.com/cJ2zllc68ZoH/?ref=app

Answer 1

Line 38, it should be like that:
if((action == '/')||(action == '*')||(action == '+')||(action == '-')||(action == '%'))
The condition “||(action == '%')” was missed.

Answer 2

Oops, how I forgot about it. Thank you very much! Soon I want to add degrees of numbers and square and cubic roots of numbers.