pusty prostokąt z gwiazdek

#include <iostream>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */
using namespace std;
int main(int argc, char** argv) {
    int a,b,h;
    cout<<"podaj wysokosc "<<endl;
    cin>>h;
    cout<<"szerokosc" <<endl;
    cin>>a;
    for (int i=1;i<=a;i++)
    cout<<"*";
    cout<<endl;
    for (int i=1 ; i<=h ; i++){
        cout<<"*";
        for(int j=1 ; j<=(a-2);j++)
        cout<<" ";
        cout<<"*"<<endl;
    }
    for (int i=1;i<=a ;i++)
    cout<<"*";

    return 0;
}