Conversion of character string to floating-point number (float type)

[Classification]

Standard library

[Syntax]

#include <stdlib.h>

float __far atoff(const char __near *nptr);

float __far _COM_atoff_f(const char __far *nptr);

[Return value]

If the partial character string has been converted, the resultant value is returned. If the character string could not be converted, 0 is returned.

If an overflow occurs, atoff returns ±∞ and sets macro ERANGE to global variable errno.

If an underflow occurs, atoff returns 0 and sets macro ERANGE to global variable errno.

[Description]

This function converts the first portion of the character string indicated by nptr into a float type representation.