What does a double pointer mean in C?

C++Server Side ProgrammingProgrammingC. A pointer is used to store the address of variables. So, when we define a pointer to pointer, the first pointer is used to store the address of the second pointer. Thus it is known as double pointers.

Why would you use a double pointer?

Double pointers can also be used when we want to alter or change the value of the pointer. In general double pointers are used if we want to store or reserve the memory allocation or assignment even outside of a function call we can do it using double pointer by just passing these functions with ** arg.

What is difference between single pointer and double pointer?

The first pointer is used to store the address of the variable. And the second pointer is used to store the address of the first pointer. That is why they are also known as double pointers.

What is triple pointer in C?

A triple-pointer is a pointer that points to a memory location where a double-pointer is being stored. The triple-pointer itself is just one pointer. Ex. int *** is a pointer, that points to the value of a double pointer, which in turn points to the value of a single pointer, which points to the value of an int.

Can we compare two pointers in C?

How to compare pointers in C/C++? We can compare pointers if they are pointing to the same array. Relational pointers can be used to compare two pointers. Pointers can’t be multiplied or divided.

What is a triple pointer give example?

Up vote -3. Triple pointer is a pointer variable that points to a pointer which in turn points to another pointer. The use of this complex programming technique is that usually in which companies process tons and tons of data at one time .

How do you know if two pointer points are the same?

Relational Operators to the Final Rescue? When two pointers are compared, the result depends on the relative locations in the address space of the objects pointed to. If two pointers to object types both point to the same object, or both point one past the last element of the same array object, they compare equal.

How do you check if two pointers are pointing to the same thing?

Pointers of the same type (after pointer conversions) can be compared for equality. Two pointers of the same type compare equal if and only if they are both null, both point to the same function, or both represent the same address (3.9. 2).