why isn't calculator working?

Question

https://code.sololearn.com/cPkEM552Z5zQ/?ref=app

Answer 1

Also change b!=0 in line 26

Answer 2

You need to use single quotation marks for char.

char op;
cin>>op

switch(op) {

case '+' : // use single quotation marks
break;

}

Answer 3

Hello Stefan,
Please specify the language relevant to the question & the code (C++) in the tags ☝

https://code.sololearn.com/W3uiji9X28C1/?ref=app