1_feclearexcept
2_fedisableexcept
3_feenableexcept
4_fegetenv
5_fegetexcept
6_fegetexceptflag
7_fegetround
8_feholdexcept
9_feraiseexcept
10_fesetenv
11_fesetexceptflag
12_fesetround
13_fetestexcept
14_feupdateenv
15feclearexcept
16fedisableexcept
17feenableexcept
18fegetenv
19fegetexcept
20fegetexceptflag
21fegetround
22feholdexcept
23feraiseexcept
24fesetenv
25fesetexceptflag
26fesetround
27fetestexcept
28feupdateenv
29