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// define test


#include <iostream>
using namespace std;

#define PI 3.1459
#define NEWLINE '\n'

int main ()
{
double r=5.0,result,result2,a,b=1,c=result;

result = 2 * PI * r;
cout << result << endl;
cout << NEWLINE;

//take the above result and deduct 1 and give 30.something as result why it bcome 1.8...e - 107 ??

a = c - b;
cout << result2;
cout << NEWLINE;


return 0;
}

// define test


#include <iostream>
using namespace std;

#define PI 3.1459
#define NEWLINE '\n'

//declared the variable
double r=5.0,result,result2,b=1,*a=&result;

int main ()
{

// processess

result = 2 * PI * r;
cout << "result is "; cout << result << endl;
cout << "10PI = 31.459";
cout << NEWLINE << endl;

//declared another variable where the above result being used again

result2 = *a - b;
cout << "result is "; cout << result2 << endl;
cout << "31.459 - 1 = 30.459";
cout << NEWLINE;


return 0;
}