예시1번
#include <iostream>
using namespace std;
int main() {
int x = 4;
int *p;
cout << endl << "(1)[address of x: " << &x << "]" << "[value of x: " << x << "]";
p = &x;
cout << endl << "(2)[address of x: " << &x << "]" << "[value of x: " << x << "]";
cout << endl << "(2)[pointed by p: " << p << "]" << "[value of pointed p: " << *p << "]";
*p = 7;
cout << endl << "(3)[address of x: " << &x << "]" << "[value of x: " << x << "]";
cout << endl << "(3)[pointed by p: " << p << "]" << "[value of pointed p: " << *p << "]";
return 0;
}
>>>
(1)[address of x: 0116F86C][value of x: 4]
(2)[address of x: 0116F86C][value of x: 4]
(2)[pointed by p: 0116F86C][value of pointed p: 4]
(3)[address of x: 0116F86C][value of x: 7]
(3)[pointed by p: 0116F86C][value of pointed p: 7]
예시2번
void swap(int* a, int* b) {
int temp = *a;
*a = *b;
*b = temp;
}
int main() {
int var1 = 5, var2 = 19;
std::cout<< "var1 = " << var1 << ", var2 = " << var2 << '\n';
swap(&var1, &var2);
std::cout << "var1 = " << var1 << ", var2 = " << var2 << '\n';
}
>>>
var1 = 5, var2 = 19
var1 = 19, var2 = 5
예시 3번
void swap(int* a, int* b) {
int temp = *a;
cout << "a= " << a << "(" << *a << "), " << "b= " << b << "(" << *b << ")" << '\n';
*a = *b;
*b = temp;
cout << "a= " << a << "(" << *a << "), " << "b= " << b << "(" << *b << ")" << '\n';
}
int main() {
int var1 = 5, var2 = 19;
cout << "var1= " << var1 << "(" << &var1 << "), "
<< "var2= " << var2 << "(" << &var2 << ")" << '\n';
swap(&var1, &var2);
cout << "var1= " << var1 << "(" << &var1 << "), "
<< "var2= " << var2 << "(" << &var2 << ")" << '\n';
}
>>>
var1= 5(0053F6EC), var2= 19(0053F6E0)
a= 0053F6EC(5), b= 0053F6E0(19)
a= 0053F6EC(19), b= 0053F6E0(5)
var1= 19(0053F6EC), var2= 5(0053F6E0)
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