C++数学运算

#include <iostream>
#include <cmath>

using namespace std;

int main () {
   // number deFinition:
   short  s = 10;
   int    i = -1000;
   long   l = 100000;
   float  f = 230.47;
   double d = 200.374;

   // mathematical operations;
   cout << sin(d) : << sin(d) << endl;
   cout << abs(i)  : << abs(i) << endl;
   cout << floor(d) : << floor(d) << endl;
   cout << sqrt(f) : << sqrt(f) << endl;
   cout << pow( d, 2) : << pow(d, 2) << endl;

   return 0;
}