#include <80c517.h>

float strtod517 (
  const char *string,      /* string to convert */
  char *ptr);             /* ptr to subsequent characters */

The strtod517 function converts string into a floating-point value. The input string is a sequence of characters that can be interpreted as a floating-point number. Whitespace characters at the beginning of string are skipped.

The value of *ptr is set to point to the first character in string immediately following the converted part of string. If ptr is NULL, no value is assigned to *ptr. If no conversion is possible, *ptr is set to the value of string and the value 0 is returned by the strtod517 function.

The strtod517 function requires string to have the following format:

<[>{+|-}<]> digits <[>.digits<]> <[>{e|E} <[>{+|-}<]> digits<]>

Where

The strtod517 function returns the floating-point value that is produced by interpreting the characters in the string as a floating-point number.

abs, atof, atof517, atoi, atol, strtod, strtol, strtoul

#include <80c517.h>
#include <stdio.h> /* for printf */

void tst_strtod517 (void) {
  float f;
  char s [] = "1.23";

  f = strtod517 (s, NULL);
  printf ("strtod517(%s) = %f\n", s, f);
}