Answer / xxx

Since I assume this is a COBOL question (and not JCL), I have tried below code.
-------------------------------------------------------

OPEN INPUT DASA
OPEN OUTPUT DASB DASC

INITIALIZE WS-NUM.
MOVE 'N' TO WS-EOF-SW.
READ DASA INTO WS-NUM
AT END MOVE 'Y' TO WS-EOF-SW
END-READ

PERFORM UNTIL WS-EOF-SW = 'Y'
DIVIDE WS-NUM BY 2 GIVING WS-Q REMAINDER WS-R
IF WS-R = 1
WRITE DASB-RCD FROM WS-NUM
ELSE
WRITE DASC-RCD FROM WS-NUM
END-IF
READ DASA INTO WS-NUM
AT END MOVE 'Y' TO WS-EOF-SW
END-READ
END-PERFORM


CLOSE DASA DASB DASC

STOP RUN
.

Answer / ranjith kumar

//JOBNAME
//STEP1 EXEC PGM=SORT
//SYSOUT DD SYSOUT=*
//SORTIN DD DSN=INPUT DSN,DISP=SHR
//OUT1 DD DSN=OUTPUT DSN1,DISP=(NEW,CATLG),
// SPACE=(CYL,(5,5)),UNIT=SYSDA
//OUT2 DD DSN=OUTPUT DSN2,DISP=(NEW,CATLG),
// SPACE=(CYL,(5,5)),UNIT=SYSDA
//SYSIN DD *
SORT FIELDS=COPY
OUTFIL FNAMES=(OUT1,OUT2),SPLIT
/*
//

Answer / harsha

For ODD records
//JOBNAME
//STEP1 EXEC PGM=SORT
//SYSOUT DD SYSOUT=*
//SORTIN DD DSN=INPUT DSN,DISP=SHR
//OUT1 DD DSN=OUTPUT DSN1,DISP=(NEW,CATLG),
// SPACE=(CYL,(5,5)),UNIT=SYSDA
//OUT2 DD DSN=OUTPUT DSN2,DISP=(NEW,CATLG),
// SPACE=(CYL,(5,5)),UNIT=SYSDA
//SYSIN DD *
SORT FIELDS=COPY
OUTFIL FNAMES=OUT1,STARTREC=1,SAMPLE=2
/*
//

For EVEN records
OUTFIL FNAMES=OUT2,STARTREC=2,SAMPLE=2

Answer / dimpy19

FILE-CONTROL.
SELECT INP ASSIGN TO INF
ORGANIZATION IS SEQUENTIAL
ACCESS MODE IS SEQUENTIAL.
DATA DIVISION.
FILE SECTION.
FD INP
RECORDING MODE IS F.
01 INP-REC.
10 STUDENT-ID PIC 9(3).
10 STUDENT-NAME PIC X(20).
FILE-CONTROL.
SELECT INP ASSIGN TO INF
ORGANIZATION IS SEQUENTIAL
ACCESS MODE IS SEQUENTIAL.
DATA DIVISION.
FILE SECTION.
FD INP
RECORDING MODE IS F.
01 INP-REC.
10 STUDENT-ID PIC 9(3).
10 STUDENT-NAME PIC X(20).
WORKING-STORAGE SECTION.
01 C PIC 99 VALUE ZEROS.
01 D PIC 99V99 VALUE ZEROS.
01 E PIC 99.99.
01 I PIC 99 VALUE ZEROS.
01 WS-INP-REC.
10 WS-STUDENT-ID PIC 9(3).
10 WS-STUDENT-NAME PIC X(20).
05 EOF PIC X VALUE 'N'.
01 PRINT-CHAR PIC X(20).
PROCEDURE DIVISION.
OPEN INPUT INP.
READ INP INTO WS-INP-REC.
PERFORM UNTIL EOF = 'Y'
ADD 1 TO I
DISPLAY I
DIVIDE 2 INTO I GIVING C REMAINDER D
MOVE D TO E
DISPLAY E
IF (D IS ZERO)THEN
DISPLAY WS-STUDENT-NAME
END-IF
READ INP INTO WS-INP-REC AT END MOVE 'Y' TO EOF
END-READ
END-PERFORM.
CLOSE INP.
GOBACK.

output :
01
01.00
02
00.00
BRPITA
03
01.00
04
00.00
DRPITA
05
01.00
06
00.00
FRPITA

input :
000001 070 ARPITA
000002 080 BRPITA
000003 090 CRPITA
000004 100 DRPITA
000005 110 ERPITA
000006 120 FRPITA

Answer / rajeev darla

The solutions provided are not real time . They are batch
solutions. If you need to do it real time then use program

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