View Compilation Error

0_0_23089237_28747.c: In function 'main':
0_0_23089237_28747.c:28:13: error: expected expression before '/' token
             //printf("%d %d\n",sum,num);
             ^
0_0_23089237_28747.c:31:17: error: expected expression before '/' token
                 //printf("1\n");
                 ^