C++ double is nan

/* isnan example */
#include <stdio.h>      /* printf */
#include <math.h>       /* isnan, sqrt */

int main()
{
  printf ("isnan(0.0)       : %d\n",isnan(0.0));
  printf ("isnan(1.0/0.0)   : %d\n",isnan(1.0/0.0));
  printf ("isnan(-1.0/0.0)  : %d\n",isnan(-1.0/0.0));
  printf ("isnan(sqrt(-1.0)): %d\n",isnan(sqrt(-1.0)));
  return 0;
}

Source: cplusplus.com

Similar codes

3 votes146 views1 answer
Initializing 2d vector
C++
0 vote129 views1 answer
Sweetalert2 email and password
C++
2 votes140 views1 answer
How to use string variable in switch case in c++
C++
13 votes133 views3 answers
Python remove repeated characters from string
C++
11 votes152 views6 answers
How to take input in 2d vector in c++
C++
3 votes100 views1 answer
2 dimensional array c++ loop
C++
0 vote130 views1 answer
Assign array to array
C++
0 vote162 views1 answer
C++ loop trhought object
C++
0 vote147 views1 answer
Get thread id c++
C++
0 vote131 views1 answer
Function return floatin c++
C++