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Walter, Wolfgang
PROG-material-public
Commits
a325df81
Commit
a325df81
authored
7 years ago
by
Felix Hilsky
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einfuhrung zu interfaces durch Modul ergänzt
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quaternionen.f95
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a325df81
MODULE
quaternionen
IMPLICIT
NONE
INTEGER
,
PARAMETER
::
pr
=
SELECTED_REAL_KIND
(
P
=
15
,
R
=
307
)
INTEGER
,
PARAMETER
::
intsize
=
SELECTED_INT_KIND
(
20
)
TYPE
quat
! Quaternionen, sowas aehnliches wie komplexe Zahlen mit 4 Dimensionen
REAL
(
kind
=
pr
)
::
reell
,
imag
,
jmag
,
kmag
END
TYPE
INTERFACE
OPERATOR
(
+
)
MODULE
PROCEDURE
add
END
INTERFACE
INTERFACE
OPERATOR
(
*
)
MODULE
PROCEDURE
mul
,
realmul
,
intmul
END
INTERFACE
TYPE
(
quat
),
PARAMETER
::
eins
=
quat
(
1
,
0
,
0
,
0
)
TYPE
(
quat
),
PARAMETER
::
i
=
quat
(
0
,
1
,
0
,
0
)
TYPE
(
quat
),
PARAMETER
::
j
=
quat
(
0
,
0
,
1
,
0
)
TYPE
(
quat
),
PARAMETER
::
k
=
quat
(
0
,
0
,
0
,
1
)
CONTAINS
FUNCTION
add
(
a
,
b
)
TYPE
(
quat
),
INTENT
(
IN
)
::
a
,
b
TYPE
(
quat
)
::
add
add
%
reell
=
a
%
reell
+
b
%
reell
add
%
imag
=
a
%
imag
+
b
%
imag
add
%
jmag
=
a
%
jmag
+
b
%
jmag
add
%
kmag
=
a
%
kmag
+
b
%
kmag
END
FUNCTION
FUNCTION
mul
(
a
,
b
)
TYPE
(
quat
),
INTENT
(
IN
)
::
a
,
b
TYPE
(
quat
)
::
mul
mul
%
reell
=
a
%
reell
*
b
%
reell
&
&
-
a
%
imag
*
b
%
imag
&
&
-
a
%
jmag
*
b
%
jmag
&
&
-
a
%
kmag
*
b
%
kmag
mul
%
imag
=
a
%
reell
*
b
%
imag
&
&
+
a
%
imag
*
b
%
reell
&
&
+
a
%
jmag
*
b
%
kmag
&
&
-
a
%
kmag
*
b
%
jmag
mul
%
jmag
=
a
%
reell
*
b
%
jmag
&
&
-
a
%
imag
*
b
%
kmag
&
&
+
a
%
jmag
*
b
%
reell
&
&
+
a
%
kmag
*
b
%
imag
mul
%
kmag
=
a
%
reell
*
b
%
kmag
&
&
+
a
%
imag
*
b
%
jmag
&
&
-
a
%
jmag
*
b
%
imag
&
&
+
a
%
kmag
*
b
%
reell
END
FUNCTION
FUNCTION
realmul
(
skalar
,
a
)
REAL
(
kind
=
pr
),
INTENT
(
IN
)
::
skalar
TYPE
(
quat
),
INTENT
(
IN
)
::
a
TYPE
(
quat
)
::
realmul
realmul
=
quat
(
skalar
*
a
%
reell
,
skalar
*
a
%
imag
,
skalar
*
a
%
jmag
,
skalar
*
a
%
kmag
)
END
FUNCTION
FUNCTION
intmul
(
skalar
,
a
)
INTEGER
(
kind
=
intsize
),
INTENT
(
IN
)
::
skalar
TYPE
(
quat
),
INTENT
(
IN
)
::
a
TYPE
(
quat
)
::
intmul
intmul
=
quat
(
skalar
*
a
%
reell
,
skalar
*
a
%
imag
,
skalar
*
a
%
jmag
,
skalar
*
a
%
kmag
)
END
FUNCTION
END
MODULE
PROGRAM
quattest
USE
quaternionen
IMPLICIT
NONE
TYPE
(
quat
)
::
q
q
=
add
(
eins
,
i
)
WRITE
(
*
,
*
)
q
q
=
eins
+
i
WRITE
(
*
,
*
)
q
q
=
3.0_pr
*
eins
+
5_intsize
*
i
! _pr und _intsize muss angefuegt werden, damit die Typen in realmul und intmul passen
write
(
*
,
*
)
q
END
PROGRAM
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