# I want to use user-defined model with fortran

asked **
2018-02-06 04:56:39 -0500
**

Anonymous

Hello, I want to use user-defined model with fortran

I use PSS/E V34.2.0

and, I want to make user-defined model

So, I will learn about fortran.

but I don't know what fortran version is used in PSS/E after version 33.0

fortran77? fortran90? fortran95?

here is an example fortran source code

# .flx file

```
INTEGER IARG, ISLOT
INTRINSIC MAX
EXTERNAL BADMID
INTEGER I, J, K, JJ, KK,
* IB, IBUS, IBPTR
REAL VERROR, VR, DEL2, FDBK, SS, R_TF_KF
LOGICAL HIGH, LOW, NEW
CHARACTER CB1*6, CB2*6
CHARACTER IM*2, VLTI*4
IF (MODE.EQ.8) GO TO 1500 ! GET DATA DESCRIPTIONS
I=IARG ! MACHINE ARRAY INDEX
J=STRTIN(1,ISLOT) ! STARTING 'CON'
K=STRTIN(2,ISLOT) ! STARenter code hereTING 'STATE'
IF (MODE.GT.4) GO TO 1000
IB=NUMTRM(I) ! RETURN IF OFF-LINE
IF (IB<=0) RETURN ! OR SVS OR INDUCTION MACHINE
```

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I think this example is made by fortran77

so, I have to learn fortran77?

please tell me the answer TT