arunenigma

def gen_primes():
    D = {}
    q = 2
    while True:
        if q not in D:
            yield q
            D[q * q] = [q]
        else:
            for p in D[q]:
                D.setdefault(p + q, []).append(p)

arunenigma

// C++ this pointer
#include <iostream>
using namespace std;

class MyClass {
    int data;
public:
    MyClass() {
        data = 100;
    }

arunenigma

// Linkedlist implementation using Classes in C++
#include <iostream>
using namespace std;
class Node {
public:
    int data;
    Node* next;
};

class LinkedList{

arunenigma

// Simple Linked List Implementation in C++

#include <iostream>
using namespace std;

void insert(); // function prototype
void display(); // function prototype
void reverseList(); // function prototype

struct node {

arunenigma

// Simple Linked List Implementation in C++

#include <iostream>
using namespace std;

void insert(); // function prototype
void display(); // function prototype

struct node {
    int data;

arunenigma

// struct with pointers C++
#include <iostream>
using namespace std;
struct Person {
    string name;
    int age;
    string sex;
};

int main() {

arunenigma

#include <iostream>
using namespace std;
struct Person {
    string name; // name, age and sex are all public by default compared to class where its private by default
    int age;
    string sex;
    void printDetails();
};

void Person::printDetails() {

arunenigma

#include <iostream>
using namespace std;

double sum(double* a, int size) {
    double total = 0;
    double *p = a;
    for (int i = 0; i < size; i++) {
        total = total + *p;
        p++;
    }

arunenigma

#include<iostream>
using namespace std;

int sum(int a[], int size){
    int total = 0;
    for (int i = 0; i < size; i ++) {
        total = total + a[i];
    }
    return total;
}

arunenigma

// pointer example 1

#include <iostream>
using namespace std;
int main() {
    double chase = 0;
    double discover = 50000;
    double* balance = &chase; // balance is a pointer to chase account
    *balance = 1000; // Initial deposit
    *balance = *balance - 100; // withdraw 100$