Pointers in C++
How are Pointers used in C++?
Explanation
Pointers refer the memory location of a variable using a reference operator. The reference operator is the "&" symbol, which means the "address of".
Pointers can be used to directly access the value stored in the variable using the "*" operator known as a "dereference operator".Another dereference operator is "->", which dereferences to a structure or union.
Result :
The value is:: 12
In the above example an integer "value" and a pointer "ptr" is declared first. The address of the variable "value" is pointed by the "ptr". Now the values of the "ptr" is assigned to 12.
Pointers can be used to directly access the value stored in the variable using the "*" operator known as a "dereference operator".Another dereference operator is "->", which dereferences to a structure or union.
Example :
| #include <iostream.h> int main () { int value; int * ptr; ptr = &value; *ptr = 12; cout << "The value is:: " << value << endl; return 0; } |
Result :
The value is:: 12
In the above example an integer "value" and a pointer "ptr" is declared first. The address of the variable "value" is pointed by the "ptr". Now the values of the "ptr" is assigned to 12.
