/in/foo.cc: In function 'int main()':
/in/foo.cc:7:14: error: expected ';' before 'char'
    7 |         d=a+b
      |              ^
      |              ;
    8 |     char ch;
      |     ~~~~      
/in/foo.cc:9:26: error: 'ch' was not declared in this scope
    9 |     scanf("%d %s %d",&a,&ch,&b);
      |                          ^~