C/math.h/isfinite

int isfinite(fpval): Returns nonzero if fpval is finite

<source lang="cpp">

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

int main(void) {

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

}

/* isfinite(-1.0) 1 isfinite(1.0) 1 isfinite(1.0/0.0) 0

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