NAME

get_float - prompts user for a line of text from stdin and returns the equivalent float

SYNOPSIS

#include <cs50.h>

float get_float(const char *format, ...);

DESCRIPTION

Prompts user for a line of text from standard input and returns the equivalent float as precisely as possible; if text does not represent a float or would cause underflow or overflow, user is reprompted.

The prompt is formatted like printf(3).

RETURN VALUE

Returns the float equivalent to the line read from stdin in [FLT_MIN, FLT_MAX), as precisely as possible. If line can’t be read, returns FLT_MAX.

EXAMPLE

 /**
  * Returns the product of two floats, or FLT_MAX on error.
  */
  float multiply_floats(void)
  {
      // read float from stdin
      float f = get_float("Enter a float: ");

      // make sure we read one successfully
      if (f == FLT_MAX)
      {
          return FLT_MAX;
      }

      float g = get_float("What do you want to multiply %f by? ", f);

      if (g == FLT_MAX)
      {
          return FLT_MAX;
      }

      return i * j;

  }

SEE ALSO

get_char(3), get_double(3), get_int(3), get_long(3), get_string(3)