[C++] 값에 의한 전달, 주소에 의한 전달, 포인터에 의한 전달 2

[C++] 값에 의한 전달, 주소에 의한 전달, 포인터에 의한 전달 2

수정필요

#include<iostream>
 
 
 
using namespace std;
 
 
 
void Address(int, int, int*, int*);//변수의 주소전달(call by address)
 
void Reference(int, int, int&, int&);//변수에 새로운 이름 부여(call by reference)
 
void value(int , int ,  int , int );//변수에 복사본을 전달(call by value)
 
 
 
void main()
 
{
 
cout <<  "call by reference, address, value의 값과 주소 출력"<< endl<< endl;
 
int a = 10, b = 20;
 
int sum, diff;
 
 
 
cout << " sum과 diff의 주소" << endl;
 
 
 
cout << &sum << "  " <<  &diff << endl;
 
cout << " a 와 b의 주소" << endl;
 
cout << &a << "  " <<&b << endl;
 
 
cout << endl;
 
 
 
 
cout << " Call by value" << endl;
 
value(a, b, sum, diff);
 
cout << &sum << "  " <<  &diff << endl;
 
cout << "main 함수 sum 과 diff의 값" << endl;
 
printf(" %d, %d\n", sum, diff);
 
cout << &sum << "  " <<  &diff << endl;
 
cout << endl;
 
 
 
cout << "Call by address" << endl;
 
cout << " 실행 직전 " << endl;
 
cout << &sum << "  " <<  &diff << endl;
 
Address(a, b, &sum, &diff);
 
cout << " 실행 직후 " << endl;
 
cout << &sum << "  " <<  &diff << endl;
 
printf(" %d, %d\n", sum, diff);
 
cout << &sum << "  " <<  &diff << endl;
 
cout << endl;
 
 
cout << " Call by reference" << endl;
 
Reference(a, b, sum, diff);
 
cout << &sum << "  " <<  &diff << endl;
 
printf(" %d, %d\n", sum, diff);
 
cout << &sum << "  " <<  &diff << endl;
 
 
 
 
 
}
 
void Address(int a, int b, int *s, int*d)
 
{
 
*s = a+b;
 
*d = a-b;
 
 
 
cout << "Address 함수 내의 s 와 d의 주소" << endl;
 
cout << &s << "  " <<&d << endl;
 
cout << "Address 함수 내의 s와 d의 값" << endl;
 
cout << s << "  " << d << endl;
 
cout << "Address 함수 내의 a와 b의 값" << endl;
 
cout << a << "  " << b << endl;
 
 
 
 
 
cout << *s <<"  "  << *d << endl<< endl;
 
 
}
 
 
 
void Reference(int a, int b, int&s, int&d)
 
{
 
 
s = a+b;
 
d = a-b;
 
 
 
cout << "Reference 함수 내의 s 와 d의 주소" << endl;
 
cout << &s << "  " << &d << endl;
 
 
 
}
 
 
 
void value(int a, int b,  int sum, int diff)
 
{
 
sum = a+b;
 
diff = a-b;
 
 
 
cout << "value 함수 내의 s 와 d의 주소" << endl;
 
cout << &sum << "  " << &diff << endl;
 
cout << "value 함수 내의 s와 d의 값" << endl;
 
cout << sum << "  " << diff << endl;
 
cout << "value 함수 내의 a와 b의 값" << endl;
 
cout << a << "  " << b << endl;
 
}