포인터는 변수의 주소를 저장하는 데 사용됩니다. C/C++에서 포인터 변수를 선언하려면 이름 앞에 별표(*)를 사용합니다.
선언
*pointer_name
C에서
예시
#include <stdio.h> int main() { // A normal integer variable int a = 7; // A pointer variable that holds address of a. int *p = &a; // Value stored is value of variable "a" printf("Value of Variable : %d\n", *p); //it will print the address of the variable "a" printf("Address of Variable : %p\n", p); // reassign the value. *p = 6; printf("Value of the variable is now: %d\n", *p); return 0; }
출력
Value of Variable : 7 Address of Variable : 0x6ffe34 Value of the variable is now: 6
C++에서
예시
#include <iostream> using namespace std; int main() { // A normal integer variable int a = 7; // A pointer variable that holds address of a. int *p = &a; // Value stored is value of variable "a" cout<<"Value of Variable : "<<*p<<endl; //it will print the address of the variable "a" cout<<"Address of Variable : "<<p<<endl; // reassign the value. *p = 6; cout<<"Value of the variable is now: "<<*p<<endl; return 0; }
출력
Value of Variable : 7 Address of Variable : 0x6ffe34 Value of the variable is now: 6