C Tutorial/math.h/isnormal
int isnormal(fpval): Returns nonzero if fpval is a normal value.
<source lang="cpp">#include <stdio.h>
- include <math.h>
int main(void) {
printf("isnormal(-1.0) %d\n", isnormal(-1.0));
printf("isnormal(1.0) %d\n", isnormal(1.0));
printf("isnormal(0.0) %d\n", isnormal(0.0));
return 0;
}</source>
isnormal(-1.0) 1 isnormal(1.0) 1 isnormal(0.0) 0
