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The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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/* PTRPTR.C: Demonstrate a pointer to a pointer. */
#include <stdio.h>
 
main()
{
   int val = 501;
   int *ptr = &val;
   int **ptr_ptr = &ptr;
   printf( "val = %d\n", **ptr_ptr );
}