ptr_func_eg_1.cpp

#include <iostream>
using namespace std;
int input(int *, int);
void display(int *, int );
int sum(int *, int );
int main()
{
    int n;
    cout << "Enter the number of rows/columns of the array: ";
    cin >> n;

    int a[n];
    int size = sizeof(a) / sizeof(a[0]);
    cout << "Enter the elements of the array: " << endl;

    input(a, size);
    cout << "Displaying  the  matrix: " << endl;
    display(a, size);
    cout << "The sum of the elements of the array is: " << sum(a, size) << endl;

    return 0;
}
int input(int *p, int size)
{
    for (int i = 0; i < size; i++)
    {
        cout << "a[" << i << "]: ";
        cin >> *(p + i);
    }
    return p[size];
}

void display(int *p, int size)
{
    cout << "[";
    for (int i = 0; i < size; i++)
    {
        cout << *(p + i) << " ";
    }
    cout << "]";
    cout << endl;
}

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