---

Lỗi biên dịch:

Main.c: In function ‘main’:
Main.c:13:18: error: expected ‘)’ before ‘;’ token
     scanf("%d",&r;
                  ^
Main.c:23:1: error: expected ‘;’ before ‘}’ token
 }
 ^
Main.c:7:7: warning: unused variable ‘dem’ [-Wunused-variable]
   int dem  = 0;
       ^~~
Main.c:8:3: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&t);
   ^~~~~~~~~~~~~~
Main.c:12:5: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&l);
     ^~~~~~~~~~~~~~
Main.c:13:5: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&r;
     ^~~~~~~~~~~~~~~
     for (int j = 1 ;j<= i;j++)
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~
     {
     ~~
       for (int k = l; k<= r;k++)
       ~~~~~~~~~~~~~~~~~~~~~~~~~~~
       {
       ~~
         if (k % 4 == 0 || k % 7 == 0 || k %11 == 0)
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    dem = 0;
    ~~~~~~~~~
       }
       ~~
     }
     ~~
     printf("%d",dem);
     ~~~~~~~~~~~~~~~~~~
 }
 ~