nrows (IT WORKS)

#include <iostream>
using namespace std; 

void printRow (int, int);

int main()
{
	int nrows;

		cout<<"Enter number of rows (>0): ";
		cin>>nrows;
		while (nrows < 0){
		cout<<"Invalid entry - try again! \nEnter a positive integer: ";
		cin>>nrows;
	}
    
    for( int r = 1 ; r <= nrows ; r++ ) {
    printRow( r, nrows ) ;	
	}
   
    return (0);
}

void printRow( int r, int nrows ) 
{
    int stars = r*2 - 1 ;
    int blanks = nrows - r ;

    for( int i = 0 ; i < blanks ; i++ ){
		cout << " " ;
}
    for( int i = 0 ; i < stars ; i++ ){
		cout << "*" ;
}
    cout << endl ; 
}