C/math.h/fpclassify

int fpclassify(fpval)

<source lang="cpp">

Returns:

FP_INFINITE 
FP_NAN 
FP_NORMAL 
FP_SUBNORMAL 
FP_ZERO 
 
       

1. include <stdio.h>
2. include <math.h>

int main(void) {

 printf("fpclassify(-1.0) %d\n", fpclassify(-1.0));
 printf("fpclassify(1.0) %d\n", fpclassify(1.0));
 printf("fpclassify(1.0/0.0) %d\n", fpclassify(1.0/0.0));
 return 0;

}

/* fpclassify(-1.0) 1024 fpclassify(1.0) 1024 fpclassify(1.0/0.0) 1280

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