Exercise 5.9

#include<iostream>using namespace std;int main(){    cout << "Enter number of rows:";    int n;    cin >> n;    for(int i = 0;i < n;i++)    {        for(int k = 0;k < n - i - 1;k++)            cout << ".";        for(int j = 0;j <= i;j++)            cout << "*";        cout << endl;    }    return 0;}