do while loop [ not working this code in online compiler]

 /******************************************************************************


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*******************************************************************************/

#include <stdio.h>


int main()

{char ch;

do{ printf ("welcome\n");

     printf ("1 - english\n");

      printf ("2 - hindi\n");

       printf ("3- science\n");

        printf ("enter q or Q to exist\n");

        ch = getch();

}while( ( ch!= 'q' && ch !='Q' ));

    printf(" thank you for visiting");


    return 0;

}


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