foo.cc: In function 'int main()':
foo.cc:14:3: error: 'else' without a previous 'if'
   14 |   else cout<<"Divided by zero!"<<endl;break;
      |   ^~~~
foo.cc:15:36: error: expected ';' before '}' token
   15 |   default:cout<<"Invalid operator!"
      |                                    ^
      |                                    ;
   16 |  }
      |  ~                                  

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