View Compilation Error

0_0_15345171_17708.c: In function 'main':
0_0_15345171_17708.c:42:8: error: expected expression before '/' token
        // printf("c1=%d\n",c1);
        ^
0_0_15345171_17708.c:43:8: error: expected expression before '/' token
        // printf("c2=%d\n",c2);
        ^