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