!>
!> SGET04 computes the difference between a computed solution and the
!> true solution to a system of linear equations.
!>
!> RESID =  ( norm(X-XACT) * RCOND ) / ( norm(XACT) * EPS ),
!> where RCOND is the reciprocal of the condition number and EPS is the
!> machine epsilon.
!> 

N

!>          N is INTEGER
!>          The number of rows of the matrices X and XACT.  N >= 0.
!> 

NRHS

!>          NRHS is INTEGER
!>          The number of columns of the matrices X and XACT.  NRHS >= 0.
!> 

X

!>          X is REAL array, dimension (LDX,NRHS)
!>          The computed solution vectors.  Each vector is stored as a
!>          column of the matrix X.
!> 

LDX

!>          LDX is INTEGER
!>          The leading dimension of the array X.  LDX >= max(1,N).
!> 

XACT

!>          XACT is REAL array, dimension( LDX, NRHS )
!>          The exact solution vectors.  Each vector is stored as a
!>          column of the matrix XACT.
!> 

LDXACT

!>          LDXACT is INTEGER
!>          The leading dimension of the array XACT.  LDXACT >= max(1,N).
!> 

RCOND

!>          RCOND is REAL
!>          The reciprocal of the condition number of the coefficient
!>          matrix in the system of equations.
!> 

RESID

!>          RESID is REAL
!>          The maximum over the NRHS solution vectors of
!>          ( norm(X-XACT) * RCOND ) / ( norm(XACT) * EPS )
!> 

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