00010 * TWOPER.CBL NADDOR/SHARKEY JAN 76.
00015	IDENTIFICATION DIVISION.
00020	ENVIRONMENT DIVISION.
00025	INPUT-OUTPUT SECTION.
00030	FILE-CONTROL. SELECT F0,ASSIGN TO DSK,RECORDING MODE ASCII.
00040	DATA DIVISION.
00045	FILE SECTION.
00050	FD  F0,LABEL STANDARD,VALUE ID F
00055	    DATA RECORD A-S1-B-S2.
00060	01  A-S1-B-S2.
00061	    02 S0 PIC X(6)   USAGE DISPLAY-7.
00062	    02 A  PIC A(10)  USAGE DISPLAY-7.
00063	    02 S1 PIC 99V999 USAGE DISPLAY-7.
00064	    02 S0 PIC X(1)   USAGE DISPLAY-7.
00065	    02 B  PIC A(10)  USAGE DISPLAY-7.
00066	    02 S2 PIC 99V999 USAGE DISPLAY-7.
00070	WORKING-STORAGE SECTION.
00075	77  F PIC X(9).
00080	01  C-S.
00081	    02 C PIC A(10).
00082	    02 Y PIC X(2) VALUE SPACES.
00083	    02 S PIC Z9.999.
00090	PROCEDURE DIVISION.
00095	    DISPLAY " ".
00100	100. DISPLAY "FILE? " WITH NO ADVANCING.
00110	    ACCEPT F.
00120	    IF F="STOP" GO TO 999.
00130	    OPEN INPUT F0
00140	    DISPLAY " ".
00200	200. READ F0 AT END GO TO 900.
00220	    IF A>B GO TO 400.
00300	    MOVE A TO C. MOVE S1 TO S. DISPLAY C-S.
00310	    MOVE B TO C. MOVE S2 TO S. DISPLAY C-S.
00320	    GO TO 500.
00400	400. MOVE B TO C. MOVE S2 TO S. DISPLAY C-S.
00410	    MOVE A TO C. MOVE S1 TO S. DISPLAY C-S.
00500	500. DISPLAY " ".
00510	    MOVE "AVERAGE   " TO C. COMPUTE S=(S1 + S2)/2. DISPLAY C-S.
00520	    DISPLAY " ". DISPLAY " ". GO TO 200.
00900	900. CLOSE F0. GO TO 100.
00999	999. STOP RUN.