fig07_14.c

C程序设计经典教程第5版程序示例,比较适合初级c语言的学生

/* Fig. 7.14: fig07_14.c
   Attempting to modify a constant pointer to constant data. */
#include <stdio.h>

int main( void )
{
   int x = 5; /* initialize x */
   int y;     /* define y */

   /* ptr is a constant pointer to a constant integer. ptr always 
      points to the same location; the integer at that location
      cannot be modified */
   const int *const ptr = &x; 
                                 
   printf( "%d\n", *ptr );

   *ptr = 7; /* error: *ptr is const; cannot assign new value */
   ptr = &y; /* error: ptr is const; cannot assign new address */

   return 0; /* indicates successful termination */

} /* end main */



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