C67. const pointer and pointer to a constant
In this video we are going to discuss about const pointer and pointer to a constnat in C.
Summary :
Const Pointer means we cannot change pointer to point to another variable.
int i = 10;
int j = 20;
int *const ptr = &i; // ptr is a const pointer to an int
*ptr = 30; // Valid, can change value pointed by pointer
ptr = &j; // Invalid, cannot point to another variable
Pointer to a const means we cannot change value pointed by pointer.
int i = 10;
int j = 20;
const int *ptr = &i; // ptr is a pointer to a const int
*ptr = 30; // Invalid, cannot change value pointed by pointer
ptr = &j; // Valid, can point to another variable
Const Pointer to a const means we cannot change value pointed by pointer.
Also we can not change pointer to point to another variable.
int i = 10;
int j = 20;
const int *const ptr = &i; // ptr is a const pointer to a const int
*ptr = 30; // Invalid, cannot change value pointed by pointer
ptr = &j; // InValid, cannot point to another variable
Audio language : Hindi
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