View Compilation Error

0_0_14175095_9313.c: In function 'main':
0_0_14175095_9313.c:21:35: error: expected expression before '/' token
      sum=a[k1]-48+b[k2]-48+bit;   //
                                   ^
0_0_14175095_9313.c:22:35: error: expected expression before '/' token
      bit=sum/10;                  //
                                   ^