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reference parameter vs pointer

Erorri Motrali answered on April 14, 2024 Popularity 1/10 Helpfulness 1/10

answer reference parameter vs pointer

reference parameter vs pointer

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// C++ program to demonstrate differences
// between pointer and reference
#include <iostream>
using namespace std;
 
struct demo {
    int a;
};
 
int main()
{
    int x = 5;
    int y = 6;
    demo d;
 
    int* p;
    p = &x;
    p = &y; // 1. Pointer reinitialization allowed
 
    int& r = x;
    // &r = y;                 // 1. Compile Error
 
    r = y; // 1. x value becomes 6
 
    p = NULL;
    // &r = NULL;             // 2. Compile Error
 
    // 3. Points to next memory location
    p++;
 
    // 3. x values becomes 7
    r++;
 
    cout << &p << " " << &x << '\n'; // 4. Different address
    cout << &r << " " << &x << '\n'; // 4. Same address
 
    demo* q = &d;
    demo& qq = d;
 
    q->a = 8;
    // q.a = 8;                 // 5. Compile Error
    qq.a = 8;
    // qq->a = 8;             // 5. Compile Error
 
    // 6. Prints the address
    cout << p << '\n';
 
    // 6. Print the value of x
    cout << r << '\n';
 
    return 0;
}

Popularity 1/10 Helpfulness 1/10 Language cpp

Source: www.geeksforgeeks.org

Tags: c++ reference

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Contributed on Apr 14 2024

Erorri Motrali

0 Answers Avg Quality 2/10

reference parameter vs pointer

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