#include <stdio.h>
#include <iostream> 
#define p 3.1415926
#define n "Number = "
using namespace std;
void main()
{
  system("cls");
  cout << p << "\n";           // 3.141593
  printf("%5.4f \n",p);        // 3.1416
  printf("%s %5.9f \n",n,p);   // Number = 3.141592600
  getchar();
}