C plus plus program to implement quadratic probing?

Answer 1

Quadratic probing is a collision resolution technique used in hash tables. In C++, you can implement it by defining a hash table class and a hash function, then using a quadratic formula to calculate the next index when a collision occurs. The formula typically used is (hash + i^2) % table_size, where i is the number of attempts. Here's a simple implementation outline:

#include <iostream>
#include <vector>
class QuadraticProbingHashTable {
std::vector<int> table;
int size;
public:
QuadraticProbingHashTable(int s) : size(s), table(s, -1) {}
void insert(int key) {
    int index = key % size;
    int i = 0;
    while (table[index] != -1) {
        index = (index + i * i) % size; // Quadratic probing
        i++;
    }
    table[index] = key;
}

void display() {
    for (int i = 0; i &lt; size; i++)
        std::cout &lt;&lt; i &lt;&lt; &quot;: &quot; &lt;&lt; table[i] &lt;&lt; std::endl;
}

};

This code snippet initializes a hash table, inserts keys using quadratic probing, and displays the table's contents.