#include <stdio.h>
#include <math.h>

int main(int argc, char** argv) {

  float f  = 0.1234567890123456789;
  double d = 0.1234567890123456789;

  int a = 20;
  int b = 6;
  double c_wrong = a / b;
  double c_right = (double)a / (double)b;

  printf("float is %d bytes\n", (int)sizeof(float));
  printf("double is %d bytes\n", (int)sizeof(double));
  printf("\n");

  printf("f = %.20g\n", f);
  printf("             ^ wrong digits start here for float\n\n");

  printf("d = %.20g\n", d);
  printf("                       ^ wrong digits start here for double\n\n");

  printf("c_wrong is %g\n", c_wrong);
  printf("c_right is %g\n", c_right);
  printf("\n");

  printf("sqrt(2.25) is %g\n", sqrt(2.25));
  printf("sqrt(-1) is %g\n", sqrt(-1));
  printf("\n");

  printf("sin of 45 deg is %g\n", sin(45 * M_PI / 180));
  printf("arcsin of %g is %g deg\n", M_SQRT1_2, asin(M_SQRT1_2) * 180 / M_PI);
  printf("arcsin of 10 is %g\n", asin(10));
  printf("\n");

  printf("log of e^3 is %g\n", log(M_E * M_E * M_E));
  printf("log of -1 is %g\n", log(-1)); 
  printf("\n");

  printf("floor(2.2) is %g\n", floor(2.2));
  printf("ceil(2.2) is %g\n", ceil(2.2));
  printf("\n");

  printf("1.0 / 0.0 is %g\n", 1.0 / 0.0);


  return 0;

}