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Pointers in C/C++
Basically, pointers are variables which stores the address of another variable. When we allocate memory to a variable, pointer points to the address of the variable. Unary operator ( * ) is used to declare a variable and it returns the address of the allocated memory.
The following is the syntax of pointers.
datatype *variable_name;
Here,
datatype − The datatype of variable like int, char, float etc.
variable_name − This is the name of variable given by user.
The following is an example of pointers.
Example
#include <stdio.h>
int main () {
int a = 8;
int *ptr;
ptr = &a;
printf("Value of variable : %d\n", a);
printf("Address of variable : %d\n", ptr);
printf("Value pointer variable : %d\n",*ptr);
return 0;
}Output
Value of variable : 8 Address of variable : -201313340 Value pointer variable : 8
In the above program, an integer variable ‘a’ and a pointer variable ‘*ptr’ is declared. The variable value and address stored by the pointer variable are shown as follows −
int a = 8; int *ptr; ptr = &a;
Updated on: 26-Jun-2020
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