199: Find the number of pairs of integers in a given array of integers whose sum is equal to a specified number

 

// Find the number of pairs of integers in a given array of integers whose sum is equal to a specified number

#include <iostream>
using namespace std;
int main()
{
    int size;
    cout << "Enter the size of array: ";
    cin >> size;
    int array[size];
    for (int i = 0; i < size; i++)
    {
        cout << "Enter a string for index " << i << ": ";
        cin >> array[i];
    }
    int num;
    cout << "Enter a number: ";
    cin >> num;
    system("cls");
    cout << "Array elements pair whose sum = " << num << ':';
    for (int i = 0; i < size; i++)
    {
        for (int j = i + 1; j < size; j++)
        {
            if (array[i] + array[j] == num)
            {
                cout << endl << array[i] << ' ' << array[j];
            }
        }
    }

    return 0;
}


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