pointer

This is a discussion on pointer within the C Programming forums, part of the General Programming Boards category; We have two programs. First program is whit POINTER and the second program is without the Pointer. Both program print ...

  1. #1
    Registered User
    Join Date
    Oct 2005
    Posts
    16

    pointer

    We have two programs. First program is
    whit POINTER and the second program is without the Pointer.
    Both program print out the same result. but why we should use POINTER.

    Code:
    /*Cube a variable using call-by-reference with a pointeargument*/
    #include <stdio.h>
       void cubeByReference( int *nPtr ); 
       int main()
    {
            int number = 5; 
            printf( "The original value of number is %d", number );
     
            cubeByReference( &number );
            printf( "\nThe new value of number is %d\n", number );
      return 0; 
    } 
    void cubeByReference( int *nPtr )
    {
       *nPtr = *nPtr * *nPtr * *nPtr; 
    }
    Code:
    #include <stdio.h>
    int cubeByValue( int n ); /* prototype */
      int main()
    {
       int number = 5; 
       printf( "The original value of number is %d", number );
       number = cubeByValue( number );
    
       printf( "\nThe new value of number is %d\n", number );
       return 0; 
    } 
    int cubeByValue( int n )
    {
       return n * n * n;   
    
    }

  2. #2
    ... kermit's Avatar
    Join Date
    Jan 2003
    Posts
    1,528
    Well, just as it was mentioned in this thread of yours, that it all depends on what you want to do. Opinions vary, but I would tend to think that if you don't need a pointer, don't use it. On the other hand, if its the easiest way to get the job done, go for it.

  3. #3
    ATH0 quzah's Avatar
    Join Date
    Oct 2001
    Posts
    14,826
    Look at the two functions, and notice a difference in how they work. That's the point of this exercise.


    Quzah.
    Hope is the first step on the road to disappointment.

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