Write a program to display the following pyramid structure using for loop. 5 44 333 2222 11111

Write a program to display the following pyramid structure using for loop. 

5 

44 

333 

2222 

11111

    #include <iostream>

using namespace std;

int main(){

       int a = 5;

       while (a > 0){

              int b = 5;

              while (b >= a){

                     cout << a;

                     b--;

              }

              cout << endl;

              a--;

       }

       system("pause");

       return 0;

}