nan
nan, nanf, nanl
Defined in header <math.h> | ||
---|---|---|
float nanf( const char* arg ); | (since C99) | |
double nan( const char* arg ); | (since C99) | |
long double nanl( const char* arg ); | (since C99) |
Converts the implementation-defined character string arg
into the corresponding quiet NaN value, as if by calling 登录查看完整内容