View Compilation Error

0_0_15376626_31545.c: In function 'update':
0_0_15376626_31545.c:66:2: error: expected expression before '/' token
  //printf("l-%d:%d r-%d:%d\n",l,value[l],r,value[r]);
  ^
0_0_15376626_31545.c: In function 'main':
0_0_15376626_31545.c:129:72: error: expected expression before '/' token
   qsort((void *)(&line[1]), index-1, sizeof(struct ele_line),cmp_line);//sort line by x1 
                                                                        ^
0_0_15376626_31545.c:131:10: error: 'i' undeclared (first use in this function)
   for (; i< index; i++)
          ^
0_0_15376626_31545.c:131:10: note: each undeclared identifier is reported only once for each function it appears in