Structure

  struct exception  
  {  
     int       type ;  
     char     *name ; 
     double    arg1 ;  
     double    arg2 ;  
     double    retval ; 
  };
  

Fields

type

Specifies the error type.

The type field contains one of the following values:

Value	Meaning
DOMAIN	A domain error has occurred, such as sqrt (-1e0).
SING	A singularity would result, such as pow (0e0,-2).
OVERFLOW	An overflow would result, such as pow (10e0,100).
UNDERFLOW	An underflow would result, such as pow (10e0,-100).
TLOSS	Total loss of significance would result, such as exp(1000).
PLOSS	Partial loss of significance would result, such as sin(10e70).

name

Points to a string containing the name of the function that detected the error.

arg1

Specifies the first argument to the function.

arg2

Specifies the second argument to the function.

retval

Specifies the default return value. This is the only field that can be changed by a developer-supplied version of matherr.