foo.cc: In function 'int main()':
foo.cc:16:31: error: expected ')' before ']' token
   16 |         tempi = atoi(a)*atoi(b]);
      |                             ~ ^
      |                               )
foo.cc:30:25: error: expected ';' before '}' token
   30 |         cout<<com[len-4]
      |                         ^
      |                         ;
   31 |     }
      |     ~                    
foo.cc:33:25: error: expected ';' before '}' token
   33 |         cout<<com[len-3]
      |                         ^
      |                         ;
   34 |     }if(com[len-2] != '0'){
      |     ~                    
foo.cc:35:25: error: expected ';' before '}' token
   35 |         cout<<com[len-2]
      |                         ^
      |                         ;
   36 |     }
      |     ~                    

[Hydro](https://hydro.ac)提供评测服务