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atof

Usage

   #include <stdlib.h>
   double atof(const char *nptr);

   ANSI

Description

   This converts the string pointed to by nptr into a double-precision

   floating point number. The string may have leading spaces, tabs, and + or
   -. Conversion stops on the first unrecognized character. If there are no
   recognized characters, the result is 0.

Example 

   #include <stdio.h>
   #include <stdlib.h>

   int main()
   {
       printf("atof function = %e\n",atof("123.5e15"));
       return EXIT_SUCCESS;
   }

Return Value

   Returns the double value derived from converting the string. Zero is
   returned if the input string does not have any recognizable characters.


See Also

   atoi, atol, ecvt, fcvt, strtol, strtod, scanf