selection C++

#include<iostream.h>
class selection{
int * ar , size;

public:
    void getInput();
    void s_sort();
    void display();
};

void selection::getInput(){
    cout << "Enter the size of array:\n";
    cin >> size;
    ar = new int[size];

    cout << "Enter the data into array:\t";
    for(int i=0;i<size;i++)
    cin >>ar[i];
}

void selection::s_sort(){
    int t;
    for(int k=0; k<size-1; k++)
    for(int m=k+1; m<size; m++)
    if(ar[k] > ar[m]){
        t = ar[k];
        ar[k] = ar[m];
        ar[m] = t;
    }
}

void selection::display(){
    cout << "Data of array after sorting = \n";
    for(int i=0;i<size;i++)
    cout << ar[i] << endl;
}

int main(){
    selection *s = new selection();
    s->getInput();
    s->s_sort();
    s->display();

    return 0;
}