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