Pointer Arithmatics : Decrementing Pointer Variable in C Programming

Decrementation of Pointer Variable Depends Upon :

• data type of the Pointer variable

Formula : ( After incrementing )

new value = ( current address in Pointer ) - i * size_of ( data type )

Example : 

Data Type	Older Address stored in pointer	Next Address stored in pointer after incrementing (ptr--)
int	1000	0998
float	1000	0996
char	1000	0999

 

Explanation : 

• Decrementing a pointer to an integer data will cause its value to be decremented by 2
• This differs from compiler to compiler as memory required to store integer vary compiler to compiler
  

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Tags / Keywords : | Pointer : Decrementation

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